1
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Arnold SR, Jain S, Dansie D, Kan H, Williams DJ, Ampofo K, Anderson EJ, Grijalva CG, Bramley AM, Pavia AT, Edwards KM, Nolan VG, McCullers JA, Kaufman RA. Association of Radiology Findings with Etiology of Community Acquired Pneumonia among Children. J Pediatr 2023; 261:113333. [PMID: 36736585 DOI: 10.1016/j.jpeds.2023.01.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 01/24/2023] [Accepted: 01/24/2023] [Indexed: 02/05/2023]
Abstract
OBJECTIVE To evaluate the association between consolidation on chest radiograph and typical bacterial etiology of childhood community acquired pneumonia (CAP) in the Etiology of Pneumonia in the Community study. STUDY DESIGN Hospitalized children <18 years of age with CAP enrolled in the Etiology of Pneumonia in the Community study at 3 children's hospitals between January 2010 and June 2012 were included. Testing of blood and respiratory specimens used multiple modalities to identify typical and atypical bacterial, or viral infection. Study radiologists classified chest radiographs (consolidation, other infiltrates [interstitial and/or alveolar], pleural effusion) using modified World Health Organization pneumonia criteria. Infiltrate patterns were compared according to etiology of CAP. RESULTS Among 2212 children, there were 1302 (59%) with consolidation with or without other infiltrates, 910 (41%) with other infiltrates, and 296 (13%) with pleural effusion. In 1795 children, at least 1 pathogen was detected. Among these patients, consolidation (74%) was the most frequently observed pattern (74% in typical bacterial CAP, 58% in atypical bacterial CAP, and 54% in viral CAP). Positive and negative predictive values of consolidation for typical bacterial CAP were 12% (95% CI 10%-15%) and 96% (95% CI 95%-97%) respectively. In a multivariable model, typical bacterial CAP was associated with pleural effusion (OR 7.3, 95% CI 4.7-11.2) and white blood cell ≥15 000/mL (OR 3.2, 95% CI 2.2-4.9), and absence of wheeze (OR 0.5, 95% CI 0.3-0.8) or viral detection (OR 0.2, 95% CI 0.1-0.4). CONCLUSIONS Consolidation predicted typical bacterial CAP poorly, but its absence made typical bacterial CAP unlikely. Pleural effusion was the best predictor of typical bacterial infection, but too uncommon to aid etiology prediction.
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Affiliation(s)
- Sandra R Arnold
- Department of Pediatrics, University of Tennessee Health Sciences Center, Memphis, TN.
| | - Seema Jain
- Centers for Disease Control and Prevention, Atlanta, GA
| | - David Dansie
- Department of Radiology, University of Utah Health Science Center, Salt Lake City, UT
| | - Herman Kan
- Department of Radiology, Vanderbilt University School of Medicine, Nashville, TN; Department of Radiology, Baylor College of Medicine, Houston, TX
| | - Derek J Williams
- Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, TN
| | - Krow Ampofo
- Department of Pediatrics, University of Utah Health Science Center, Salt Lake City, UT
| | - Evan J Anderson
- Departments of Pediatrics and Medicine, Emory University School of Medicine, Atlanta, GA
| | - Carlos G Grijalva
- Department of Health Policy, Vanderbilt University Medical Center, Nashville, TN
| | | | - Andrew T Pavia
- Department of Pediatrics, University of Utah Health Science Center, Salt Lake City, UT
| | - Kathryn M Edwards
- Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, TN
| | - Vikki G Nolan
- Division of Epidemiology, School of Public Health, University of Memphis, Memphis, TN
| | - Jonathan A McCullers
- Department of Pediatrics, University of Tennessee Health Sciences Center, Memphis, TN; Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN
| | - Robert A Kaufman
- Department of Diagnostic Imaging, St. Jude Children's Research Hospital, Memphis, TN
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2
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Self WH, Wunderink RG, DiNubile MJ, Stossel TP, Levinson SL, Williams DJ, Anderson EJ, Bramley AM, Jain S, Edwards KM, Grijalva CG. Low Admission Plasma Gelsolin Concentrations Identify Community-acquired Pneumonia Patients at High Risk for Severe Outcomes. Clin Infect Dis 2020; 69:1218-1225. [PMID: 30561561 DOI: 10.1093/cid/ciy1049] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Accepted: 12/05/2018] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Plasma gelsolin (pGSN) is an abundant circulating protein that neutralizes actin exposed by damaged cells, modulates inflammatory responses, and enhances alveolar macrophage antimicrobial activity. We investigated whether adults with low pGSN at hospital admission for community-acquired pneumonia (CAP) were at high risk for severe outcomes. METHODS Admission pGSN concentrations in 455 adults hospitalized with CAP were measured using enzyme-linked immunosorbent assay. Patients were grouped into the following 4 hierarchical, mutually exclusive categories based on maximum clinical severity experienced during their hospitalization: general floor care without intensive care unit (ICU) admission, invasive respiratory or vasopressor support (IRVS), or death; ICU care without IRVS or death; IRVS without death; or death. Admission pGSN concentrations were compared across these discrete outcome categories. Additionally, outcomes among patients in the lowest quartile of pGSN concentration were compared to those in the upper 3 quartiles. RESULTS Overall, median (interquartile range) pGSN concentration was 38.1 (32.1, 45.7) μg/mL. Patients with more severe outcomes had lower pGSN concentrations (P = .0001); median values were 40.3 μg/mL for floor patients, 36.7 μg/mL for ICU patients, 36.5 μg/mL for patients receiving IRVS, and 25.7 μg/mL for patients who died. Compared to patients with higher pGSN concentrations, patients in the lowest quartile (pGSN ≤ 32.1 μg/mL) more often required IRVS (21.2% vs 11.7%, P = .0114) and died (8.8% vs 0.9%, P < .0001). CONCLUSIONS Among adults hospitalized with CAP, lower pGSN concentrations were associated with more severe clinical outcomes. Future studies are planned to investigate possible therapeutic benefits of recombinant human pGSN in this population.
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Affiliation(s)
- Wesley H Self
- Department of Emergency Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Richard G Wunderink
- Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | | | | | | | - Derek J Williams
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Evan J Anderson
- Department of Medicine, Emory University School of Medicine, Atlanta, Georgia
| | - Anna M Bramley
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Seema Jain
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Kathryn M Edwards
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Carlos G Grijalva
- Department of Health Policy, Vanderbilt University Medical Center, Nashville, Tennessee
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Kutty PK, Jain S, Taylor TH, Bramley AM, Diaz MH, Ampofo K, Arnold SR, Williams DJ, Edwards KM, McCullers JA, Pavia AT, Winchell JM, Schrag SJ, Hicks LA. Mycoplasma pneumoniae Among Children Hospitalized With Community-acquired Pneumonia. Clin Infect Dis 2020; 68:5-12. [PMID: 29788037 DOI: 10.1093/cid/ciy419] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 05/14/2018] [Indexed: 12/22/2022] Open
Abstract
Background The epidemiology of Mycoplasma pneumoniae (Mp) among US children (<18 years) hospitalized with community-acquired pneumonia (CAP) is poorly understood. Methods In the Etiology of Pneumonia in the Community study, we prospectively enrolled 2254 children hospitalized with radiographically confirmed pneumonia from January 2010-June 2012 and tested nasopharyngeal/oropharyngeal swabs for Mp using real-time polymerase chain reaction (PCR). Clinical and epidemiological features of Mp PCR-positive and -negative children were compared using logistic regression. Macrolide susceptibility was assessed by genotyping isolates. Results One hundred and eighty two (8%) children were Mp PCR-positive (median age, 7 years); 12% required intensive care and 26% had pleural effusion. No in-hospital deaths occurred. Macrolide resistance was found in 4% (6/169) isolates. Of 178 (98%) Mp PCR-positive children tested for copathogens, 50 (28%) had ≥1 copathogen detected. Variables significantly associated with higher odds of Mp detection included age (10-17 years: adjusted odds ratio [aOR], 10.7 [95% confidence interval {CI}, 5.4-21.1] and 5-9 years: aOR, 6.4 [95% CI, 3.4-12.1] vs 2-4 years), outpatient antibiotics ≤5 days preadmission (aOR, 2.3 [95% CI, 1.5-3.5]), and copathogen detection (aOR, 2.1 [95% CI, 1.3-3.3]). Clinical characteristics were non-specific. Conclusions Usually considered as a mild respiratory infection, Mp was the most commonly detected bacteria among children aged ≥5 years hospitalized with CAP, one-quarter of whom had codetections. Although associated with clinically nonspecific symptoms, there was a need for intensive care in some cases. Mycoplasma pneumoniae should be included in the differential diagnosis for school-aged children hospitalized with CAP.
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Affiliation(s)
- Preeta K Kutty
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Seema Jain
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Thomas H Taylor
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Anna M Bramley
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Maureen H Diaz
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Krow Ampofo
- University of Utah Health Sciences Center, Salt Lake City
| | - Sandra R Arnold
- Le Bonheur Children's Hospital, Memphis.,University of Tennessee Health Science Center, Memphis
| | - Derek J Williams
- Vanderbilt University Medical Center, Nashville.,Monroe Carell Jr Children's Hospital at Vanderbilt, Nashville
| | - Kathryn M Edwards
- Vanderbilt University Medical Center, Nashville.,Monroe Carell Jr Children's Hospital at Vanderbilt, Nashville
| | - Jonathan A McCullers
- Le Bonheur Children's Hospital, Memphis.,University of Tennessee Health Science Center, Memphis.,St Jude Children's Research Hospital, Memphis, Tennessee
| | - Andrew T Pavia
- University of Utah Health Sciences Center, Salt Lake City
| | | | | | - Lauri A Hicks
- Centers for Disease Control and Prevention, Atlanta, Georgia
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4
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Nolan VG, Arnold SR, Bramley AM, Ampofo K, Williams DJ, Grijalva CG, Self WH, Anderson EJ, Wunderink RG, Edwards KM, Pavia AT, Jain S, McCullers JA. Etiology and Impact of Coinfections in Children Hospitalized With Community-Acquired Pneumonia. J Infect Dis 2019; 218:179-188. [PMID: 29228381 PMCID: PMC7108488 DOI: 10.1093/infdis/jix641] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Accepted: 12/05/2017] [Indexed: 12/22/2022] Open
Abstract
Background Recognition that coinfections are common in children with community-acquired pneumonia (CAP) is increasing, but gaps remain in our understanding of their frequency and importance. Methods We analyzed data from 2219 children hospitalized with CAP and compared demographic and clinical characteristics and outcomes between groups with viruses alone, bacteria alone, or coinfections. We also assessed the frequency of selected pairings of codetected pathogens and their clinical characteristics. Results A total of 576 children (26%) had a coinfection. Children with only virus detected were younger, more likely to be black, and more likely to have comorbidities such as asthma, compared with children infected with typical bacteria alone. Children with virus-bacterium coinfections had a higher frequency of leukocytosis, consolidation on chest radiography, parapneumonic effusions, intensive care unit admission, and need for mechanical ventilation and an increased length of stay, compared with children infected with viruses alone. Virus-virus coinfections were generally comparable to single-virus infections, with the exception of the need for oxygen supplementation, which was higher during the first 24 hours of hospitalization in some virus-virus pairings. Conclusions Coinfections occurred in 26% of children hospitalized for CAP. Children with typical bacterial infections, alone or complicated by a viral infection, have worse outcomes than children infected with a virus alone.
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Affiliation(s)
- Vikki G Nolan
- Division of Epidemiology, School of Public Health, University of Memphis
| | - Sandra R Arnold
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis
| | - Anna M Bramley
- Centers for Disease Control and Prevention, Emory University School of Medicine, Atlanta, Georgia
| | - Krow Ampofo
- Department of Pediatrics, University of Utah Health Sciences Center, Salt Lake City
| | - Derek J Williams
- Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Carlos G Grijalva
- Department of Health Policy, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Wesley H Self
- Department of Emergency Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Evan J Anderson
- Departments of Pediatrics and Medicine, Emory University School of Medicine, Atlanta, Georgia
| | - Richard G Wunderink
- Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - Kathryn M Edwards
- Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Andrew T Pavia
- Department of Pediatrics, University of Utah Health Sciences Center, Salt Lake City
| | - Seema Jain
- Centers for Disease Control and Prevention, Emory University School of Medicine, Atlanta, Georgia
| | - Jonathan A McCullers
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis
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5
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Fritz CQ, Edwards KM, Self WH, Grijalva CG, Zhu Y, Arnold SR, McCullers JA, Ampofo K, Pavia AT, Wunderink RG, Anderson EJ, Bramley AM, Jain S, Williams DJ. Prevalence, Risk Factors, and Outcomes of Bacteremic Pneumonia in Children. Pediatrics 2019; 144:peds.2018-3090. [PMID: 31217309 PMCID: PMC6615516 DOI: 10.1542/peds.2018-3090] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/03/2019] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND Previous studies examining bacteremia in hospitalized children with pneumonia are limited by incomplete culture data. We sought to determine characteristics of children with bacteremic pneumonia using data from a large prospective study with systematic blood culturing. METHODS Children <18 years hospitalized with pneumonia and enrolled in the multicenter Etiology of Pneumonia in the Community study between January 2010 and June 2012 were eligible. Bivariate comparisons were used to identify factors associated with bacteremia. Associations between bacteremia and clinical outcomes were assessed by using Cox proportional hazards regression for length of stay and logistic regression for ICU admission and invasive mechanical ventilation or shock. RESULTS Blood cultures were obtained in 2143 (91%) of 2358 children; 46 (2.2%) had bacteremia. The most common pathogens were Streptococcus pneumoniae (n = 23, 50%), Staphylococcus aureus (n = 6, 13%), and Streptococcus pyogenes (n = 4, 9%). Characteristics associated with bacteremia included male sex, parapneumonic effusion, lack of chest indrawing or wheezing, and no previous receipt of antibiotics. Children with bacteremia had longer lengths of stay (median: 5.8 vs 2.8 days; adjusted hazard ratio: 0.79 [0.73-0.86]) and increased odds of ICU admission (43% vs 21%; adjusted odds ratio: 5.21 [3.82-6.84]) and invasive mechanical ventilation or shock (30% vs 8%; adjusted odds ratio: 5.28 [2.41-11.57]). CONCLUSIONS Bacteremia was uncommonly detected in this large multicenter cohort of children hospitalized with community-acquired pneumonia but was associated with severe disease. S pneumoniae was detected most often. Blood culture was of low yield in general but may have greater use in those with parapneumonic effusion and ICU admission.
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Affiliation(s)
- Cristin Q. Fritz
- Monroe Carell Jr. Children’s Hospital at
Vanderbilt, Nashville, Tennessee
| | - Kathryn M. Edwards
- Monroe Carell Jr. Children’s Hospital at
Vanderbilt, Nashville, Tennessee;,School of Medicine, Vanderbilt University, Nashville,
Tennessee;,Vanderbilt Vaccine Research Program, Nashville,
Tennessee
| | - Wesley H. Self
- School of Medicine, Vanderbilt University, Nashville,
Tennessee
| | | | - Yuwei Zhu
- School of Medicine, Vanderbilt University, Nashville,
Tennessee
| | - Sandra R. Arnold
- Le Bonheur Children’s Hospital, Memphis,
Tennessee;,University of Tennessee Health Science Center,
Memphis, Tennessee
| | - Jonathan A. McCullers
- Le Bonheur Children’s Hospital, Memphis,
Tennessee;,University of Tennessee Health Science Center,
Memphis, Tennessee;,St. Jude Children’s Research Hospital,
Memphis, Tennessee
| | - Krow Ampofo
- University of Utah Health Sciences Center, Salt Lake
City, Utah
| | - Andrew T. Pavia
- University of Utah Health Sciences Center, Salt Lake
City, Utah
| | | | | | - Anna M. Bramley
- Centers for Disease Control and Prevention, Atlanta,
Georgia
| | - Seema Jain
- Centers for Disease Control and Prevention, Atlanta,
Georgia
| | - Derek J. Williams
- Monroe Carell Jr. Children’s Hospital at
Vanderbilt, Nashville, Tennessee;,School of Medicine, Vanderbilt University, Nashville,
Tennessee;,Vanderbilt Vaccine Research Program, Nashville,
Tennessee
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6
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Bellew S, Grijalva CG, Williams DJ, Anderson EJ, Wunderink RG, Zhu Y, Waterer GW, Bramley AM, Jain S, Edwards KM, Self WH. Pneumococcal and Legionella Urinary Antigen Tests in Community-acquired Pneumonia: Prospective Evaluation of Indications for Testing. Clin Infect Dis 2019; 68:2026-2033. [PMID: 30265290 PMCID: PMC7182343 DOI: 10.1093/cid/ciy826] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Accepted: 09/26/2018] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Adult, community-acquired pneumonia (CAP) guidelines from the Infectious Diseases Society of America (IDSA) and American Thoracic Society (ATS) include indications for urinary antigen tests (UATs) for Streptococcus pneumoniae (SP) and Legionella pneumophila (LP). These recommendations were based on expert opinions and have not been rigorously evaluated. METHODS We used data from a multicenter, prospective, surveillance study of adults hospitalized with CAP to evaluate the sensitivity and specificity of the IDSA/ATS UAT indications for identifying patients who test positive. SP and LP UATs were completed on all included patients. Separate analyses were completed for SP and LP, using 2-by-2 contingency tables, comparing the IDSA/ATS indications (UAT recommended vs not recommended) and UAT results (positive vs negative). Additionally, logistic regression was used to evaluate the association of each individual criterion in the IDSA/ATS indications with positive UAT results. RESULTS Among 1941 patients, UATs were positive for SP in 81 (4.2%) and for LP in 32 (1.6%). IDSA/ATS indications had 61% sensitivity (95% confidence interval [CI] 49-71%) and 39% specificity (95% CI 37-41%) for SP, and 63% sensitivity (95% CI 44-79%) and 35% specificity (95% CI 33-37%) for LP. No clinical characteristics were strongly associated with positive SP UATs, while features associated with positive LP UATs were hyponatremia, fever, diarrhea, and recent travel. CONCLUSIONS Recommended indications for SP and LP urinary antigen testing in the IDSA/ATS CAP guidelines have poor sensitivity and specificity for identifying patients with positive tests; future CAP guidelines should consider other strategies for determining which patients should undergo urinary antigen testing.
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Affiliation(s)
- Shawna Bellew
- Vanderbilt University Medical Center, Nashville, Tennessee
| | | | | | | | | | - Yuwei Zhu
- Vanderbilt University Medical Center, Nashville, Tennessee
| | | | - Anna M Bramley
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Seema Jain
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | | | - Wesley H Self
- Vanderbilt University Medical Center, Nashville, Tennessee
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7
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Pratt CQ, Zhu Y, Grijalva CG, Wunderink RG, Mark Courtney D, Waterer G, Levine MZ, Jefferson S, Self WH, Williams DJ, Finelli L, Bramley AM, Edwards KM, Jain S, Anderson EJ. Serological response to influenza vaccination among adults hospitalized with community-acquired pneumonia. Influenza Other Respir Viruses 2018; 13:208-212. [PMID: 30485702 PMCID: PMC6379631 DOI: 10.1111/irv.12622] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2018] [Revised: 11/18/2018] [Accepted: 11/24/2018] [Indexed: 11/26/2022] Open
Abstract
Ninety‐five adults enrolled in the Etiology of Pneumonia in the Community study with negative admission influenza polymerase chain reaction (PCR) tests received influenza vaccination during hospitalization. Acute and convalescent influenza serology was performed. After vaccination, seropositive (≥1:40) hemagglutination antibody titers (HAI) were achieved in 55% to influenza A(H1N1)pdm09, 58% to influenza A(H3N2), 77% to influenza B (Victoria), and 74% to influenza B (Yamagata) viruses. Sixty‐six (69%) patients seroconverted (≥4‐fold HAI rise) to ≥1 strain. Failure to seroconvert was associated with diabetes, bacterial detection, baseline seropositive titers for influenza B (Yamagata), and influenza vaccination in the previous season.
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Affiliation(s)
| | - Yuwei Zhu
- Department of Biostatistics, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Carlos G Grijalva
- Department of Health Policy, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Richard G Wunderink
- Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - D Mark Courtney
- Department of Emergency Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
| | - Grant Waterer
- Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA.,University of Western Australia, Perth, WA, Australia
| | - Min Z Levine
- Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Stacie Jefferson
- Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Wesley H Self
- Department of Emergency Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Derek J Williams
- Division of Hospital Medicine, Monroe Carell Jr. Children's Hospital, Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Lynn Finelli
- Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Anna M Bramley
- Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Kathryn M Edwards
- Division of Infectious Diseases, Monroe Carell Jr. Children's Hospital, Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Seema Jain
- Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Evan J Anderson
- Departments of Pediatrics and Medicine, Emory University School of Medicine, Atlanta, Georgia, USA
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8
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Bozio CH, Flanders WD, Finelli L, Bramley AM, Reed C, Gandhi NR, Vidal JE, Erdman D, Levine MZ, Lindstrom S, Ampofo K, Arnold SR, Self WH, Williams DJ, Grijalva CG, Anderson EJ, McCullers JA, Edwards KM, Pavia AT, Wunderink RG, Jain S. Use of Multiple Imputation to Estimate the Proportion of Respiratory Virus Detections Among Patients Hospitalized With Community-Acquired Pneumonia. Open Forum Infect Dis 2018; 5:ofy061. [PMID: 29946553 DOI: 10.1093/ofid/ofy061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Accepted: 03/14/2018] [Indexed: 11/14/2022] Open
Abstract
Background Real-time polymerase chain reaction (PCR) on respiratory specimens and serology on paired blood specimens are used to determine the etiology of respiratory illnesses for research studies. However, convalescent serology is often not collected. We used multiple imputation to assign values for missing serology results to estimate virus-specific prevalence among pediatric and adult community-acquired pneumonia hospitalizations using data from an active population-based surveillance study. Methods Presence of adenoviruses, human metapneumovirus, influenza viruses, parainfluenza virus types 1-3, and respiratory syncytial virus was defined by positive PCR on nasopharyngeal/oropharyngeal specimens or a 4-fold rise in paired serology. We performed multiple imputation by developing a multivariable regression model for each virus using data from patients with available serology results. We calculated absolute and relative differences in the proportion of each virus detected comparing the imputed to observed (nonimputed) results. Results Among 2222 children and 2259 adults, 98.8% and 99.5% had nasopharyngeal/oropharyngeal specimens and 43.2% and 37.5% had paired serum specimens, respectively. Imputed results increased viral etiology assignments by an absolute difference of 1.6%-4.4% and 0.8%-2.8% in children and adults, respectively; relative differences were 1.1-3.0 times higher. Conclusions Multiple imputation can be used when serology results are missing, to refine virus-specific prevalence estimates, and these will likely increase estimates.
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Affiliation(s)
- Catherine H Bozio
- Department of Epidemiology, Emory University, Atlanta, Georgia.,Department of Global Health, Emory University, Atlanta, Georgia
| | - W Dana Flanders
- Department of Epidemiology, Emory University, Atlanta, Georgia
| | - Lyn Finelli
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Anna M Bramley
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Carrie Reed
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Neel R Gandhi
- Department of Epidemiology, Emory University, Atlanta, Georgia.,Graduate Program in Molecules to Mankind, Emory University, Atlanta, Georgia.,Emory University School of Medicine, Atlanta, Georgia
| | - Jorge E Vidal
- Graduate Program in Molecules to Mankind, Emory University, Atlanta, Georgia
| | - Dean Erdman
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Min Z Levine
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | | | - Krow Ampofo
- University of Utah Health Sciences Center, Salt Lake City, Utah
| | - Sandra R Arnold
- Le Bonheur Children's Hospital, Memphis, Tennessee.,University of Tennessee Health Science Center, Memphis, Tennessee
| | - Wesley H Self
- Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Derek J Williams
- Vanderbilt University School of Medicine, Nashville, Tennessee.,Vanderbilt Vaccine Research Program, Nashville, Tennessee
| | | | | | - Jonathan A McCullers
- Le Bonheur Children's Hospital, Memphis, Tennessee.,University of Tennessee Health Science Center, Memphis, Tennessee.,St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Kathryn M Edwards
- Vanderbilt University School of Medicine, Nashville, Tennessee.,Vanderbilt Vaccine Research Program, Nashville, Tennessee
| | - Andrew T Pavia
- University of Utah Health Sciences Center, Salt Lake City, Utah
| | | | - Seema Jain
- Centers for Disease Control and Prevention, Atlanta, Georgia
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9
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Waterer GW, Self WH, Courtney DM, Grijalva CG, Balk RA, Girard TD, Fakhran SS, Trabue C, McNabb P, Anderson EJ, Williams DJ, Bramley AM, Jain S, Edwards KM, Wunderink RG. In-Hospital Deaths Among Adults With Community-Acquired Pneumonia. Chest 2018; 154:628-635. [PMID: 29859184 DOI: 10.1016/j.chest.2018.05.021] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Revised: 04/10/2018] [Accepted: 05/01/2018] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Adults hospitalized with community-acquired pneumonia (CAP) are at high risk for short-term mortality. However, it is unclear whether improvements in in-hospital pneumonia care could substantially lower this risk. We extensively reviewed all in-hospital deaths in a large prospective CAP study to assess the cause of each death and assess the extent of potentially preventable mortality. METHODS We enrolled adults hospitalized with CAP at five tertiary-care hospitals in the United States. Five physician investigators reviewed the medical record and study database for each patient who died to identify the cause of death, the contribution of CAP to death, and any preventable factors potentially contributing to death. RESULTS Among 2,320 enrolled patients, 52 (2.2%) died during initial hospitalization. Among these 52 patients, 33 (63.4%) were ≥ 65 years old, and 32 (61.5%) had ≥ two chronic comorbidities. CAP was judged to be the direct cause of death in 27 patients (51.9%). Ten patients (19.2%) had do-not-resuscitate orders prior to admission. Four patients were identified in whom a lapse in quality of care potentially contributed to death; preexisting end-of-life limitations were present in two of these patients. Two patients seeking full medical care experienced a lapse in in-hospital quality of pneumonia care that potentially contributed to death. CONCLUSIONS In this study of adults with CAP at tertiary-care hospitals with a low mortality rate, most in-hospital deaths did not appear to be preventable with improvements in in-hospital pneumonia care. Preexisting end-of-life limitations in care, advanced age, and high comorbidity burden were common among those who died.
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Affiliation(s)
- Grant W Waterer
- University of Western Australia, Perth, WA, Australia; Northwestern University Feinberg School of Medicine, Chicago, IL.
| | | | - D Mark Courtney
- Northwestern University Feinberg School of Medicine, Chicago, IL
| | | | | | | | | | - Christopher Trabue
- University of Tennessee Health Science Center/Saint Thomas Health, Nashville, TN
| | - Paul McNabb
- University of Tennessee Health Science Center/Saint Thomas Health, Nashville, TN
| | | | | | | | - Seema Jain
- Centers for Disease Control and Prevention, Atlanta, GA
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10
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Self WH, Balk RA, Grijalva CG, Williams DJ, Zhu Y, Anderson EJ, Waterer GW, Courtney DM, Bramley AM, Trabue C, Fakhran S, Blaschke AJ, Jain S, Edwards KM, Wunderink RG. Procalcitonin as a Marker of Etiology in Adults Hospitalized With Community-Acquired Pneumonia. Clin Infect Dis 2018; 65:183-190. [PMID: 28407054 PMCID: PMC5850442 DOI: 10.1093/cid/cix317] [Citation(s) in RCA: 148] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Accepted: 04/12/2017] [Indexed: 12/16/2022] Open
Abstract
Background Recent trials suggest procalcitonin-based guidelines can reduce antibiotic use for respiratory infections. However, the accuracy of procalcitonin to discriminate between viral and bacterial pneumonia requires further dissection. Methods We evaluated the association between serum procalcitonin concentration at hospital admission with pathogens detected in a multicenter prospective surveillance study of adults hospitalized with community-acquired pneumonia. Systematic pathogen testing included cultures, serology, urine antigen tests, and molecular detection. Accuracy of procalcitonin to discriminate between viral and bacterial pathogens was calculated. Results Among 1735 patients, pathogens were identified in 645 (37%), including 169 (10%) with typical bacteria, 67 (4%) with atypical bacteria, and 409 (24%) with viruses only. Median procalcitonin concentration was lower with viral pathogens (0.09 ng/mL; interquartile range [IQR], <0.05-0.54 ng/mL) than atypical bacteria (0.20 ng/mL; IQR, <0.05-0.87 ng/mL; P = .05), and typical bacteria (2.5 ng/mL; IQR, 0.29-12.2 ng/mL; P < .01). Procalcitonin discriminated bacterial pathogens, including typical and atypical bacteria, from viral pathogens with an area under the receiver operating characteristic (ROC) curve of 0.73 (95% confidence interval [CI], .69-.77). A procalcitonin threshold of 0.1 ng/mL resulted in 80.9% (95% CI, 75.3%-85.7%) sensitivity and 51.6% (95% CI, 46.6%-56.5%) specificity for identification of any bacterial pathogen. Procalcitonin discriminated between typical bacteria and the combined group of viruses and atypical bacteria with an area under the ROC curve of 0.79 (95% CI, .75-.82). Conclusions No procalcitonin threshold perfectly discriminated between viral and bacterial pathogens, but higher procalcitonin strongly correlated with increased probability of bacterial pathogens, particularly typical bacteria.
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Affiliation(s)
- Wesley H Self
- Vanderbilt University Medical Center, Nashville, Tennessee
| | | | | | | | - Yuwei Zhu
- Vanderbilt University Medical Center, Nashville, Tennessee
| | | | - Grant W Waterer
- University of Western Australia, Perth.,Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - D Mark Courtney
- Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - Anna M Bramley
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Christopher Trabue
- University of Tennessee Health Science Center/Saint Thomas Health, Nashville
| | - Sherene Fakhran
- John H. Stroger, Jr Hospital of Cook County, Chicago, Illinois
| | | | - Seema Jain
- Centers for Disease Control and Prevention, Atlanta, Georgia
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11
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Lu X, Schneider E, Jain S, Bramley AM, Hymas W, Stockmann C, Ampofo K, Arnold SR, Williams DJ, Self WH, Patel A, Chappell JD, Grijalva CG, Anderson EJ, Wunderink RG, McCullers JA, Edwards KM, Pavia AT, Erdman DD. Rhinovirus Viremia in Patients Hospitalized With Community-Acquired Pneumonia. J Infect Dis 2017; 216:1104-1111. [PMID: 28968668 DOI: 10.1093/infdis/jix455] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 08/29/2017] [Indexed: 11/12/2022] Open
Abstract
Background Rhinoviruses (RVs) are ubiquitous respiratory pathogens that often cause mild or subclinical infections. Molecular detection of RVs from the upper respiratory tract can be prolonged, complicating etiologic association in persons with severe lower respiratory tract infections. Little is known about RV viremia and its value as a diagnostic indicator in persons hospitalized with community-acquired pneumonia (CAP). Methods Sera from RV-positive children and adults hospitalized with CAP were tested for RV by real-time reverse-transcription polymerase chain reaction. Rhinovirus species and type were determined by partial genome sequencing. Results Overall, 57 of 570 (10%) RV-positive patients were viremic, and all were children aged <10 years (n = 57/375; 15.2%). Although RV-A was the most common RV species detected from respiratory specimens (48.8%), almost all viremias were RV-C (98.2%). Viremic patients had fewer codetected pathogens and were more likely to have chest retractions, wheezing, and a history of underlying asthma/reactive airway disease than patients without viremia. Conclusions More than 1 out of 7 RV-infected children aged <10 years hospitalized with CAP were viremic. In contrast with other RV species, RV-C infections were highly associated with viremia and were usually the only respiratory pathogen identified, suggesting that RV-C viremia may be an important diagnostic indicator in pediatric pneumonia.
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Affiliation(s)
- Xiaoyan Lu
- Centers for Disease Control and Prevention
| | | | - Seema Jain
- Centers for Disease Control and Prevention
| | | | - Weston Hymas
- University of Utah Health Sciences Center, Salt Lake City
| | | | - Krow Ampofo
- University of Utah Health Sciences Center, Salt Lake City
| | - Sandra R Arnold
- Le Bonheur Children's Hospital, Memphis.,University of Tennessee Health Science Center, Memphis
| | | | | | - Anami Patel
- Le Bonheur Children's Hospital, Memphis.,University of Tennessee Health Science Center, Memphis
| | | | | | | | | | - Jonathan A McCullers
- Le Bonheur Children's Hospital, Memphis.,University of Tennessee Health Science Center, Memphis.,St. Jude Children's Research Hospital, Memphis, Tennessee
| | | | - Andrew T Pavia
- University of Utah Health Sciences Center, Salt Lake City
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12
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Williams DJ, Edwards KM, Self WH, Zhu Y, Arnold SR, McCullers JA, Ampofo K, Pavia AT, Anderson EJ, Hicks LA, Bramley AM, Jain S, Grijalva CG. Effectiveness of β-Lactam Monotherapy vs Macrolide Combination Therapy for Children Hospitalized With Pneumonia. JAMA Pediatr 2017; 171:1184-1191. [PMID: 29084336 PMCID: PMC6583650 DOI: 10.1001/jamapediatrics.2017.3225] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
IMPORTANCE β-Lactam monotherapy and β-lactam plus macrolide combination therapy are both common empirical treatment strategies for children hospitalized with pneumonia, but few studies have evaluated the effectiveness of these 2 treatment approaches. OBJECTIVE To compare the effectiveness of β-lactam monotherapy vs β-lactam plus macrolide combination therapy among a cohort of children hospitalized with pneumonia. DESIGN, SETTING, AND PARTICIPANTS We analyzed data from the Etiology of Pneumonia in the Community Study, a multicenter, prospective, population-based study of community-acquired pneumonia hospitalizations conducted from January 1, 2010, to June 30, 2012, in 3 children's hospitals in Nashville, Tennessee; Memphis, Tennessee; and Salt Lake City, Utah. The study included all children (up to 18 years of age) who were hospitalized with radiographically confirmed pneumonia and who received β-lactam monotherapy or β-lactam plus macrolide combination therapy. Data analysis was completed in April 2017. MAIN OUTCOMES AND MEASURES We defined the referent as β-lactam monotherapy, including exclusive use of an oral or parenteral second- or third-generation cephalosporin, penicillin, ampicillin, ampicillin-sulbactam, amoxicillin, or amoxicillin-clavulanate. Use of a β-lactam plus an oral or parenteral macrolide (azithromycin or clarithromycin) served as the comparison group. We modeled the association between these groups and patients' length of stay using multivariable Cox proportional hazards regression. Covariates included demographic, clinical, and radiographic variables. We further evaluated length of stay in a cohort matched by propensity to receive combination therapy. Logistic regression was used to evaluate secondary outcomes in the unmatched cohort, including intensive care admission, rehospitalizations, and self-reported recovery at follow-up. RESULTS Our study included 1418 children (693 girls and 725 boys) with a median age of 27 months (interquartile range, 12-69 months). This cohort was 60.1% of the 2358 children enrolled in the Etiology of Pneumonia in the Community Study with radiographically confirmed pneumonia in the study period; 1019 (71.9%) received β-lactam monotherapy and 399 (28.1%) received β-lactam plus macrolide combination therapy. In the unmatched cohort, there was no statistically significant difference in length of hospital stay between children receiving β-lactam monotherapy and combination therapy (median, 55 vs 59 hours; adjusted hazard ratio, 0.87; 95% CI, 0.74-1.01). The propensity-matched cohort (n = 560, 39.5%) showed similar results. There were also no significant differences between treatment groups for the secondary outcomes. CONCLUSIONS AND RELEVANCE Empirical macrolide combination therapy conferred no benefit over β-lactam monotherapy for children hospitalized with community-acquired pneumonia. The results of this study elicit questions about the routine empirical use of macrolide combination therapy in this population.
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Affiliation(s)
- Derek J. Williams
- Division of Hospital Medicine, Monroe Carell Jr. Children’s Hospital, Vanderbilt University Medical Center, Nashville, Tennessee,The Vanderbilt Vaccine Research Program, Department of Pediatrics, Vanderbilt University Medical Center, Nashville
| | - Kathryn M. Edwards
- Division of Infectious Diseases, Monroe Carell Jr. Children’s Hospital, Vanderbilt University Medical Center, Nashville, Tennessee,The Vanderbilt Vaccine Research Program, Department of Pediatrics, Vanderbilt University Medical Center, Nashville
| | - Wesley H. Self
- Department of Emergency Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Yuwei Zhu
- Division of Biostatistics, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Sandra R. Arnold
- Division of Infectious Diseases, Le Bonheur Children’s Hospital, Memphis, Tennessee,Department of Pediatrics, University of Tennessee Health Sciences Center, Memphis
| | - Jonathan A. McCullers
- Division of Infectious Diseases, Le Bonheur Children’s Hospital, Memphis, Tennessee,Department of Pediatrics, University of Tennessee Health Sciences Center, Memphis
| | - Krow Ampofo
- Division of Infectious Diseases, Primary Children’s Medical Center, Salt Lake City, Utah
| | - Andrew T. Pavia
- Division of Infectious Diseases, Primary Children’s Medical Center, Salt Lake City, Utah,Department of Pediatrics, University of Utah School of Medicine, Salt Lake City
| | - Evan J. Anderson
- Division of Infectious Diseases, Departments of Medicine and Pediatrics, Emory University School of Medicine, Atlanta, Georgia
| | - Lauri A. Hicks
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Anna M. Bramley
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Seema Jain
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Carlos G. Grijalva
- Department of Health Policy, Vanderbilt University Medical Center, Nashville, Tennessee
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13
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Hurwitz JL, Jones BG, Penkert RR, Gansebom S, Sun Y, Tang L, Bramley AM, Jain S, McCullers JA, Arnold SR. Low Retinol-Binding Protein and Vitamin D Levels Are Associated with Severe Outcomes in Children Hospitalized with Lower Respiratory Tract Infection and Respiratory Syncytial Virus or Human Metapneumovirus Detection. J Pediatr 2017; 187:323-327. [PMID: 28578159 PMCID: PMC5588918 DOI: 10.1016/j.jpeds.2017.04.061] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 03/23/2017] [Accepted: 04/26/2017] [Indexed: 12/13/2022]
Abstract
Retinol binding protein and vitamin D were measured in children aged <5 years hospitalized with lower respiratory tract infection and respiratory syncytial virus and/or human metapneumovirus detections. Low vitamin levels were observed in 50% of the children and were associated with significantly elevated risk of the need for intensive care unit admission and invasive mechanical ventilation.
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Affiliation(s)
- Julia L Hurwitz
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN; Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center (UTHSC), Memphis, TN
| | - Bart G Jones
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN
| | - Rhiannon R Penkert
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN
| | - Shane Gansebom
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN
| | - Yilun Sun
- Department of Biostatistics, St. Jude Children's Research Hospital, Memphis, TN
| | - Li Tang
- Department of Biostatistics, St. Jude Children's Research Hospital, Memphis, TN
| | - Anna M Bramley
- Influenza Division, Centers for Disease Control and Prevention, Atlanta, GA
| | - Seema Jain
- Influenza Division, Centers for Disease Control and Prevention, Atlanta, GA
| | - Jonathan A McCullers
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN; Department of Pediatrics, UTHSC, Memphis, TN; Le Bonheur Children's Hospital, Memphis, TN
| | - Sandra R Arnold
- Department of Pediatrics, UTHSC, Memphis, TN; Le Bonheur Children's Hospital, Memphis, TN
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14
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Bramley AM, Chaves SS, Dawood FS, Doshi S, Reingold A, Miller L, Yousey-Hindes K, Farley MM, Ryan P, Lynfield R, Baumbach J, Zansky S, Bennett N, Thomas A, Schaffner W, Finelli L, Jain S. Utility of Keywords from Chest Radiograph Reports for Pneumonia Surveillance Among Hospitalized Patients with Influenza: The CDC Influenza Hospitalization Surveillance Network, 2008-2009. Public Health Rep 2017; 131:483-90. [PMID: 27252568 DOI: 10.1177/003335491613100314] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
OBJECTIVE Transcripts from admission chest radiographs could aid in identification of pneumonia cases for public health surveillance. We assessed the reliability of radiographic data abstraction and performance of radiographic key terms to identify pneumonia in patients hospitalized with laboratory-confirmed influenza virus infection. METHODS We used data on patients hospitalized with laboratory-confirmed influenza virus infection from October 2008 through December 2009 from 10 geographically diverse U.S. study sites participating in the Influenza Hospitalization Surveillance Network (FluSurv-NET). Radiographic key terms (i.e., bronchopneumonia, consolidation, infiltrate, airspace density, and pleural effusion) were abstracted from final impressions of chest radiograph reports. We assessed the reliability of radiographic data abstraction by examining the percent agreement and Cohen's k statistic between clinicians and surveillance staff members. Using a composite reference standard for presence or absence of pneumonia based on International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM) codes and discharge summary data, we calculated sensitivity, specificity, positive predictive value (PPV), and percent agreement for individual and combined radiographic key terms. RESULTS For each radiographic key term, the percent agreement between clinicians and surveillance staff members ranged from 89.4% to 98.6% and Cohen's k ranged from 0.46 (moderate) to 0.84 (almost perfect). The combination of bronchopneumonia or consolidation or infiltrate or airspace density terms had sensitivity of 66.5%, specificity of 89.2%, PPV of 80.4%, and percent agreement of 80.1%. Adding pleural effusion did not result in significant changes in sensitivity, specificity, PPV, or percent agreement. CONCLUSION Radiographic key terms abstracted by surveillance staff members from final impressions of chest radiograph reports had moderate to almost perfect reliability and could be used to identify pneumonia among patients hospitalized with laboratory-confirmed influenza virus infection. This method can inform pneumonia surveillance and aid in public health response.
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Affiliation(s)
- Anna M Bramley
- Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases, Influenza Division, Atlanta, GA
| | - Sandra S Chaves
- Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases, Influenza Division, Atlanta, GA
| | - Fatimah S Dawood
- Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases, Influenza Division, Atlanta, GA
| | - Saumil Doshi
- Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases, Influenza Division, Atlanta, GA
| | | | - Lisa Miller
- Colorado Department of Public Health and Environment, Denver, CO
| | | | - Monica M Farley
- Emory University School of Medicine and Veterans Affairs Medical Center, Atlanta, GA
| | - Patricia Ryan
- Maryland Department of Health and Mental Hygiene, Baltimore, MD
| | | | | | - Shelley Zansky
- New York State Department of Health, Emerging Infections Program, Albany, NY
| | - Nancy Bennett
- University of Rochester School of Medicine and Dentistry, Center for Community Health and Department of Medicine, Rochester, NY
| | - Ann Thomas
- Oregon Public Health Division, Portland, OR
| | | | - Lyn Finelli
- Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases, Influenza Division, Atlanta, GA
| | - Seema Jain
- Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases, Influenza Division, Atlanta, GA
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15
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Tomczyk S, Jain S, Bramley AM, Self WH, Anderson EJ, Trabue C, Courtney DM, Grijalva CG, Waterer GW, Edwards KM, Wunderink RG, Hicks LA. Antibiotic Prescribing for Adults Hospitalized in the Etiology of Pneumonia in the Community Study. Open Forum Infect Dis 2017; 4:ofx088. [PMID: 28730159 PMCID: PMC5510457 DOI: 10.1093/ofid/ofx088] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 05/04/2017] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Community-acquired pneumonia (CAP) 2007 guidelines from the Infectious Diseases Society of America (IDSA)/American Thoracic Society (ATS) recommend a respiratory fluoroquinolone or beta-lactam plus macrolide as first-line antibiotics for adults hospitalized with CAP. Few studies have assessed guideline-concordant antibiotic use for patients hospitalized with CAP after the 2007 IDSA/ATS guidelines. We examine antibiotics prescribed and associated factors in adults hospitalized with CAP. METHODS From January 2010 to June 2012, adults hospitalized with clinical and radiographic CAP were enrolled in a prospective Etiology of Pneumonia in the Community study across 5 US hospitals. Patients were interviewed using a standardized questionnaire, and medical charts were reviewed. Antibiotics prescribed were classified according to defined nonrecommended CAP antibiotics. We assessed factors associated with nonrecommended CAP antibiotics using logistic regression. RESULTS Among enrollees, 1843 of 1874 (98%) ward and 440 of 446 (99%) ICU patients received ≥1 antibiotic ≤24 hours after admission. Ward patients were prescribed a respiratory fluoroquinolone alone (n = 613; 33%), or beta-lactam plus macrolide (n = 365; 19%), beta-lactam alone (n = 240; 13%), among other antibiotics, including vancomycin (n = 235; 13%) or piperacillin/tazobactam (n = 157; 8%) ≤24 hours after admission. Ward patients with known risk for healthcare-associated pneumonia (HCAP), recent outpatient antibiotic use, and in-hospital antibiotic use <6 hours after admission were significantly more likely to receive nonrecommended CAP antibiotics. CONCLUSIONS Although more than half of ward patients received antibiotics concordant with IDSA/ATS guidelines, a number received nonrecommended CAP antibiotics, including vancomycin and piperacillin/tazobactam; risk factors for HCAP, recent outpatient antibiotic, and rapid inpatient antibiotic use contributed to this. This hypothesis-generating descriptive epidemiology analysis could help inform antibiotic stewardship efforts, reinforces the need to harmonize guidelines for CAP and HCAP, and highlights the need for improved diagnostics to better equip clinicians.
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Affiliation(s)
- Sara Tomczyk
- Epidemic Intelligence Service
- Respiratory Diseases Branch
| | | | | | | | | | - Chris Trabue
- University of Tennessee Health Science Center, Nashville, Tennessee
| | - D Mark Courtney
- Northwestern University Feinberg School of Medicine, Chicago, Illinois; and
| | | | - Grant W Waterer
- Northwestern University Feinberg School of Medicine, Chicago, Illinois; and
- University of Western Australia, Perth, Australia
| | | | | | - Lauri A Hicks
- Respiratory Diseases Branch
- Division of Healthcare Quality Promotion, Centers for Disease Control and Prevention, and
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16
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Bramley AM, Reed C, Finelli L, Self WH, Ampofo K, Arnold SR, Williams DJ, Grijalva CG, Anderson EJ, Stockmann C, Trabue C, Fakhran S, Balk R, McCullers JA, Pavia AT, Edwards KM, Wunderink RG, Jain S. Relationship Between Body Mass Index and Outcomes Among Hospitalized Patients With Community-Acquired Pneumonia. J Infect Dis 2017; 215:1873-1882. [PMID: 28520948 PMCID: PMC5853774 DOI: 10.1093/infdis/jix241] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 05/16/2017] [Indexed: 02/06/2023] Open
Abstract
Background The effect of body mass index (BMI) on community-acquired pneumonia (CAP) severity is unclear. Methods We investigated the relationship between BMI and CAP outcomes (hospital length of stay [LOS], intensive care unit [ICU] admission, and invasive mechanical ventilation) in hospitalized CAP patients from the Centers for Disease Control and Prevention Etiology of Pneumonia in the Community (EPIC) study, adjusting for age, demographics, underlying conditions, and smoking status (adults only). Results Compared with normal-weight children, odds of ICU admission were higher in children who were overweight (adjusted odds ratio [aOR], 1.7; 95% confidence interval [CI], 1.1-2.8) or obese (aOR, 2.1; 95% CI, 1.4-3.2), and odds of mechanical ventilation were higher in children with obesity (aOR, 2.7; 95% CI, 1.3-5.6). When stratified by asthma (presence/absence), these findings remained significant only in children with asthma. Compared with normal-weight adults, odds of LOS >3 days were higher in adults who were underweight (aOR, 1.6; 95% CI, 1.1-2.4), and odds of mechanical ventilation were lowest in adults who were overweight (aOR, 0.5; 95% CI, .3-.9). Conclusions Children who were overweight or obese, particularly those with asthma, had higher odds of ICU admission or mechanical ventilation. In contrast, adults who were underweight had longer LOS. These results underscore the complex relationship between BMI and CAP outcomes.
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Affiliation(s)
- Anna M Bramley
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Carrie Reed
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Lyn Finelli
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Wesley H Self
- Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Krow Ampofo
- University of Utah Health Sciences Center, Salt Lake City
| | - Sandra R Arnold
- Le Bonheur Children's Hospital, Memphis
- University of Tennessee Health Science Center, Memphis
| | - Derek J Williams
- Vanderbilt University School of Medicine, Nashville, Tennessee
- Vanderbilt Vaccine Research Program, Nashville, Tennessee
| | | | | | | | - Christopher Trabue
- University of Tennessee Health Science Center/Saint Thomas Health, Nashville
| | | | - Robert Balk
- Rush University Medical Center, Chicago, Illinois
| | - Jonathan A McCullers
- Le Bonheur Children's Hospital, Memphis
- University of Tennessee Health Science Center, Memphis
- St Jude Children's Research Hospital, Memphis, Tennessee
| | - Andrew T Pavia
- University of Utah Health Sciences Center, Salt Lake City
| | - Kathryn M Edwards
- Vanderbilt University School of Medicine, Nashville, Tennessee
- Vanderbilt Vaccine Research Program, Nashville, Tennessee
| | | | - Seema Jain
- Centers for Disease Control and Prevention, Atlanta, Georgia
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17
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Harris AM, Bramley AM, Jain S, Arnold SR, Ampofo K, Self WH, Williams DJ, Anderson EJ, Grijalva CG, McCullers JA, Pavia AT, Wunderink RG, Edwards KM, Winchell JM, Hicks LA. Influence of Antibiotics on the Detection of Bacteria by Culture-Based and Culture-Independent Diagnostic Tests in Patients Hospitalized With Community-Acquired Pneumonia. Open Forum Infect Dis 2017; 4:ofx014. [PMID: 28480285 DOI: 10.1093/ofid/ofx014] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Accepted: 01/26/2017] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Specimens collected after antibiotic exposure may reduce culture-based bacterial detections. The impact on culture-independent diagnostic tests is unclear. We assessed the effect of antibiotic exposure on both of these test results among patients hospitalized with community-acquired pneumonia (CAP). METHODS Culture-based bacterial testing included blood cultures and high-quality sputum or endotracheal tube (ET) aspirates; culture-independent testing included urinary antigen testing (adults) for Streptococcus pneumoniae and Legionella pneumophila and polymerase chain reaction (PCR) on nasopharyngeal and oropharyngeal (NP/OP) swabs for Mycoplasma pneumoniae and Chlamydia pneumoniae. The proportion of bacterial detections was compared between specimens collected before and after either any antibiotic exposure (prehospital and/or inpatient) or only prehospital antibiotics and increasing time after initiation of inpatient antibiotics. RESULTS Of 4678 CAP patients, 4383 (94%) received antibiotics: 3712 (85%) only inpatient, 642 (15%) both inpatient and prehospital, and 29 (<1%) only prehospital. There were more bacterial detections in specimens collected before antibiotics for blood cultures (5.2% vs 2.6%; P < .01) and sputum/ET cultures (50.0% vs 26.8%; P < .01) but not urine antigen (7.0% vs 5.7%; P = .53) or NP/OP PCR (6.7% vs 5.4%; P = .31). For all diagnostic testing, bacterial detections declined with increasing time between inpatient antibiotic administration and specimen collection. CONCLUSIONS Bacteria were less frequently detected in culture-based tests collected after antibiotics and in culture-independent tests that had longer intervals between antibiotic exposure and specimen collection. Bacterial yield could improve if specimens were collected promptly, preferably before antibiotics, providing data for improved antibiotic selection.
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Affiliation(s)
- Aaron M Harris
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Anna M Bramley
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Seema Jain
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Sandra R Arnold
- Le Bonheur Children's Hospital, Memphis, Tennessee.,University of Tennessee Health Science Center, Memphis
| | - Krow Ampofo
- University of Utah Health Sciences Center, Salt Lake City
| | - Wesley H Self
- Vanderbilt University School of Medicine, Nashville, Tennessee
| | | | | | | | - Jonathan A McCullers
- Le Bonheur Children's Hospital, Memphis, Tennessee.,University of Tennessee Health Science Center, Memphis.,St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Andrew T Pavia
- University of Utah Health Sciences Center, Salt Lake City
| | | | | | | | - Lauri A Hicks
- Centers for Disease Control and Prevention, Atlanta, Georgia
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18
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Wolff BJ, Bramley AM, Thurman KA, Whitney CG, Whitaker B, Self WH, Arnold SR, Trabue C, Wunderink RG, McCullers J, Edwards KM, Jain S, Winchell JM. Improved Detection of Respiratory Pathogens by Use of High-Quality Sputum with TaqMan Array Card Technology. J Clin Microbiol 2017; 55:110-121. [PMID: 27795345 PMCID: PMC5228222 DOI: 10.1128/jcm.01805-16] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Accepted: 10/12/2016] [Indexed: 11/20/2022] Open
Abstract
New diagnostic platforms often use nasopharyngeal or oropharyngeal (NP/OP) swabs for pathogen detection for patients hospitalized with community-acquired pneumonia (CAP). We applied multipathogen testing to high-quality sputum specimens to determine if more pathogens can be identified relative to NP/OP swabs. Children (<18 years old) and adults hospitalized with CAP were enrolled over 2.5 years through the Etiology of Pneumonia in the Community (EPIC) study. NP/OP specimens with matching high-quality sputum (defined as ≤10 epithelial cells/low-power field [lpf] and ≥25 white blood cells/lpf or a quality score [q-score] definition of 2+) were tested by TaqMan array card (TAC), a multipathogen real-time PCR detection platform. Among 236 patients with matched specimens, a higher proportion of sputum specimens had ≥1 pathogen detected compared with NP/OP specimens in children (93% versus 68%; P < 0.0001) and adults (88% versus 61%; P < 0.0001); for each pathogen targeted, crossing threshold (CT) values were earlier in sputum. Both bacterial (361 versus 294) and viral detections (245 versus 140) were more common in sputum versus NP/OP specimens, respectively, in both children and adults. When available, high-quality sputum may be useful for testing in hospitalized CAP patients.
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Affiliation(s)
- Bernard J Wolff
- Division of Bacterial Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Anna M Bramley
- Influenza Division, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Kathleen A Thurman
- Division of Bacterial Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Cynthia G Whitney
- Division of Bacterial Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Brett Whitaker
- Division of Viral Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Wesley H Self
- Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Sandra R Arnold
- University of Tennessee Health Science Center/Saint Thomas Health, Nashville, Tennessee, USA
- Le Bonheur Children's Hospital, Memphis, Tennessee, USA
| | - Christopher Trabue
- University of Tennessee Health Science Center/Saint Thomas Health, Nashville, Tennessee, USA
| | | | - Jon McCullers
- University of Tennessee Health Science Center/Saint Thomas Health, Nashville, Tennessee, USA
- Le Bonheur Children's Hospital, Memphis, Tennessee, USA
- St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | | | - Seema Jain
- Influenza Division, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Jonas M Winchell
- Division of Bacterial Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
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Williams DJ, Zhu Y, Grijalva CG, Self WH, Harrell FE, Reed C, Stockmann C, Arnold SR, Ampofo KK, Anderson EJ, Bramley AM, Wunderink RG, McCullers JA, Pavia AT, Jain S, Edwards KM. Predicting Severe Pneumonia Outcomes in Children. Pediatrics 2016; 138:peds.2016-1019. [PMID: 27688362 PMCID: PMC5051209 DOI: 10.1542/peds.2016-1019] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/20/2016] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Substantial morbidity and excessive care variation are seen with pediatric pneumonia. Accurate risk-stratification tools to guide clinical decision-making are needed. METHODS We developed risk models to predict severe pneumonia outcomes in children (<18 years) by using data from the Etiology of Pneumonia in the Community Study, a prospective study of community-acquired pneumonia hospitalizations conducted in 3 US cities from January 2010 to June 2012. In-hospital outcomes were organized into an ordinal severity scale encompassing severe (mechanical ventilation, shock, or death), moderate (intensive care admission only), and mild (non-intensive care hospitalization) outcomes. Twenty predictors, including patient, laboratory, and radiographic characteristics at presentation, were evaluated in 3 models: a full model included all 20 predictors, a reduced model included 10 predictors based on expert consensus, and an electronic health record (EHR) model included 9 predictors typically available as structured data within comprehensive EHRs. Ordinal regression was used for model development. Predictive accuracy was estimated by using discrimination (concordance index). RESULTS Among the 2319 included children, 21% had a moderate or severe outcome (14% moderate, 7% severe). Each of the models accurately identified risk for moderate or severe pneumonia (concordance index across models 0.78-0.81). Age, vital signs, chest indrawing, and radiologic infiltrate pattern were the strongest predictors of severity. The reduced and EHR models retained most of the strongest predictors and performed as well as the full model. CONCLUSIONS We created 3 risk models that accurately estimate risk for severe pneumonia in children. Their use holds the potential to improve care and outcomes.
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Affiliation(s)
| | | | | | - Wesley H. Self
- Emergency Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | | | - Carrie Reed
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Chris Stockmann
- Department of Pediatrics, University of Utah Health Sciences Center, Salt Lake City, Utah
| | - Sandra R. Arnold
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee
| | - Krow K. Ampofo
- Department of Pediatrics, University of Utah Health Sciences Center, Salt Lake City, Utah
| | - Evan J. Anderson
- Departments of Pediatrics and Medicine, Emory University School of Medicine, Atlanta, Georgia; and
| | - Anna M. Bramley
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Richard G. Wunderink
- Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - Jonathan A. McCullers
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee
| | - Andrew T. Pavia
- Department of Pediatrics, University of Utah Health Sciences Center, Salt Lake City, Utah
| | - Seema Jain
- Centers for Disease Control and Prevention, Atlanta, Georgia
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20
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Pettigrew MM, Gent JF, Kong Y, Wade M, Gansebom S, Bramley AM, Jain S, Arnold SLR, McCullers JA. Association of sputum microbiota profiles with severity of community-acquired pneumonia in children. BMC Infect Dis 2016; 16:317. [PMID: 27391033 PMCID: PMC4939047 DOI: 10.1186/s12879-016-1670-4] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Accepted: 06/09/2016] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Competitive interactions among bacteria in the respiratory tract microbiota influence which species can colonize and potentially contribute to pathogenesis of community-acquired pneumonia (CAP). However, understanding of the role of respiratory tract microbiota in the clinical course of pediatric CAP is limited. METHODS We sought to compare microbiota profiles in induced sputum and nasopharyngeal/oropharyngeal (NP/OP) samples from children and to identify microbiota profiles associated with CAP severity. We used 16S ribosomal RNA sequencing and several measures of microbiota profiles, including principal component analysis (PCA), to describe the respiratory microbiota in 383 children, 6 months to <18 years, hospitalized with CAP. We examined associations between induced sputum and NP/OP microbiota profiles and CAP severity (hospital length of stay and intensive care unit admission) using logistic regression. RESULTS Relative abundance of bacterial taxa differed in induced sputum and NP/OP samples. In children 6 months to < 5 years, the sputum PCA factor with high relative abundance of Actinomyces, Veillonella, Rothia, and Lactobacillales was associated with decreased odds of length of stay ≥ 4 days [adjusted odds ratio (aOR) 0.69; 95 % confidence interval (CI) 0.48-0.99]. The sputum factor with high relative abundance of Haemophilus and Pasteurellaceae was associated with increased odds of intensive care unit admission [aOR 1.52; 95 % CI 1.02-2.26]. In children 5 to < 18 years, the sputum factor with high relative abundance of Porphyromonadaceae, Bacteriodales, Lactobacillales, and Prevotella was associated with increased odds of length of stay ≥ 4 days [aOR 1.52; 95 % CI 1.02-2.26]. Taxa in NP/OP samples were not associated with CAP severity. CONCLUSION Certain taxa in the respiratory microbiota, which were detected in induced sputum samples, are associated with the clinical course of CAP.
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Affiliation(s)
- Melinda M Pettigrew
- Yale School of Public Health, New Haven, CT, USA.
- Department of Epidemiology of Microbial Diseases, Yale School of Public Health, 60 College Street, LEPH 720, New Haven, CT, 06515, USA.
| | | | - Yong Kong
- Yale School of Medicine, New Haven, CT, USA
| | - Martina Wade
- Yale School of Public Health, New Haven, CT, USA
| | | | - Anna M Bramley
- Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Seema Jain
- Centers for Disease Control and Prevention, Atlanta, GA, USA
| | | | - Jonathan A McCullers
- St. Jude Children's Research Hospital, Memphis, TN, USA
- University of Tennessee Health Science Center, Memphis, TN, USA
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21
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Millman AJ, Finelli L, Bramley AM, Peacock G, Williams DJ, Arnold SR, Grijalva CG, Anderson EJ, McCullers JA, Ampofo K, Pavia AT, Edwards KM, Jain S. Community-Acquired Pneumonia Hospitalization among Children with Neurologic Disorders. J Pediatr 2016; 173:188-195.e4. [PMID: 27017483 PMCID: PMC4897771 DOI: 10.1016/j.jpeds.2016.02.049] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 01/28/2016] [Accepted: 02/18/2016] [Indexed: 11/27/2022]
Abstract
OBJECTIVE To describe and compare the clinical characteristics, outcomes, and etiology of pneumonia among children hospitalized with community-acquired pneumonia (CAP) with neurologic disorders, non-neurologic underlying conditions, and no underlying conditions. STUDY DESIGN Children <18 years old hospitalized with clinical and radiographic CAP were enrolled at 3 US children's hospitals. Neurologic disorders included cerebral palsy, developmental delay, Down syndrome, epilepsy, non-Down syndrome chromosomal abnormalities, and spinal cord abnormalities. We compared the epidemiology, etiology, and clinical outcomes of CAP in children with neurologic disorders with those with non-neurologic underlying conditions, and those with no underlying conditions using bivariate, age-stratified, and multivariate logistic regression analyses. RESULTS From January 2010-June 2012, 2358 children with radiographically confirmed CAP were enrolled; 280 (11.9%) had a neurologic disorder (52.1% of these individuals also had non-neurologic underlying conditions), 934 (39.6%) had non-neurologic underlying conditions only, and 1144 (48.5%) had no underlying conditions. Children with neurologic disorders were older and more likely to require intensive care unit (ICU) admission than children with non-neurologic underlying conditions and children with no underlying conditions; similar proportions were mechanically ventilated. In age-stratified analysis, children with neurologic disorders were less likely to have a pathogen detected than children with non-neurologic underlying conditions. In multivariate analysis, having a neurologic disorder was associated with ICU admission for children ≥2 years of age. CONCLUSIONS Children with neurologic disorders hospitalized with CAP were less likely to have a pathogen detected and more likely to be admitted to the ICU than children without neurologic disorders.
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Affiliation(s)
- Alexander J. Millman
- Influenza Division, Centers for Disease Control and Prevention, Atlanta, GA,Epidemic Intelligence Service, Centers for Disease Control and Prevention, Atlanta, GA,Reprint requests: Alexander J. Millman, MD, Influenza Division, Centers for Disease Control and Prevention, 1600 Clifton Rd, Mailstop G-37, Atlanta, GA 30329.
| | - Lyn Finelli
- Influenza Division, Centers for Disease Control and Prevention, Atlanta, GA
| | - Anna M. Bramley
- Influenza Division, Centers for Disease Control and Prevention, Atlanta, GA
| | - Georgina Peacock
- National Center on Birth Defects and Developmental Disabilities, Centers for Disease Control and Prevention, Atlanta, GA
| | | | - Sandra R. Arnold
- Le Bonheur Children's Hospital, Memphis, TN,University of Tennessee Health Science Center, Memphis, TN
| | | | | | - Jonathan A. McCullers
- Le Bonheur Children's Hospital, Memphis, TN,University of Tennessee Health Science Center, Memphis, TN,St. Jude Children's Research Hospital, Memphis, TN
| | - Krow Ampofo
- University of Utah Health Sciences Center, Salt Lake City, UT
| | - Andrew T. Pavia
- University of Utah Health Sciences Center, Salt Lake City, UT
| | | | - Seema Jain
- Influenza Division, Centers for Disease Control and Prevention, Atlanta, GA
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22
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Havers F, Bramley AM, Finelli L, Reed C, Self WH, Trabue C, Fakhran S, Balk R, Courtney DM, Girard TD, Anderson EJ, Grijalva CG, Edwards KM, Wunderink RG, Jain S. Statin Use and Hospital Length of Stay Among Adults Hospitalized With Community-acquired Pneumonia. Clin Infect Dis 2016; 62:1471-1478. [PMID: 27169476 DOI: 10.1093/cid/ciw174] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Accepted: 03/09/2016] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Prior retrospective studies suggest that statins may benefit patients with community-acquired pneumonia (CAP) due to antiinflammatory and immunomodulatory effects. However, prospective studies of the impact of statins on CAP outcomes are needed. We determined whether statin use was associated with improved outcomes in adults hospitalized with CAP. METHODS Adults aged ≥18 years hospitalized with CAP were prospectively enrolled at 3 hospitals in Chicago, Illinois, and 2 hospitals in Nashville, Tennessee, from January 2010-June 2012. Adults receiving statins before and throughout hospitalization (statin users) were compared with those who did not receive statins (nonusers). Proportional subdistribution hazards models were used to examine the association between statin use and hospital length of stay (LOS). In-hospital mortality was a secondary outcome. We also compared groups matched on propensity score. RESULTS Of 2016 adults enrolled, 483 (24%) were statin users; 1533 (76%) were nonusers. Statin users were significantly older, had more comorbidities, had more years of education, and were more likely to have health insurance than nonusers. Multivariable regression demonstrated that statin users and nonusers had similar LOS (adjusted hazard ratio [HR], 0.99; 95% confidence interval [CI], .88-1.12), as did those in the propensity-matched groups (HR, 1.03; 95% CI, .88-1.21). No significant associations were found between statin use and LOS or in-hospital mortality, even when stratified by pneumonia severity. CONCLUSIONS In a large prospective study of adults hospitalized with CAP, we found no evidence to suggest that statin use before and during hospitalization improved LOS or in-hospital mortality.
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Affiliation(s)
- Fiona Havers
- Influenza Division, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Anna M Bramley
- Influenza Division, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Lyn Finelli
- Influenza Division, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Carrie Reed
- Influenza Division, Centers for Disease Control and Prevention, Atlanta, Georgia
| | | | - Christopher Trabue
- University of Tennessee Health Sciences Center, Saint Thomas Health, Nashville
| | | | | | - D Mark Courtney
- Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - Timothy D Girard
- Vanderbilt University School of Medicine.,Department of Veterans Affairs Medical Center, Nashville, Tennessee
| | | | | | | | | | - Seema Jain
- Influenza Division, Centers for Disease Control and Prevention, Atlanta, Georgia
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23
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Self WH, Grijalva CG, Williams DJ, Woodworth A, Balk RA, Fakhran S, Zhu Y, Courtney DM, Chappell J, Anderson EJ, Qi C, Waterer GW, Trabue C, Bramley AM, Jain S, Edwards KM, Wunderink RG. Procalcitonin as an Early Marker of the Need for Invasive Respiratory or Vasopressor Support in Adults With Community-Acquired Pneumonia. Chest 2016; 150:819-828. [PMID: 27107491 DOI: 10.1016/j.chest.2016.04.010] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Revised: 02/02/2016] [Accepted: 04/01/2016] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Predicting the need for intensive care among adults with community-acquired pneumonia (CAP) remains challenging. METHODS Using a multicenter prospective cohort study of adults hospitalized with CAP, we evaluated the association of serum procalcitonin (PCT) concentration at hospital presentation with the need for invasive respiratory or vasopressor support (IRVS), or both, within 72 h. Logistic regression was used to model this association, with results reported as the estimated risk of IRVS for a given PCT concentration. We also assessed whether the addition of PCT changed the performance of established pneumonia severity scores, including the pneumonia severity index and the American Thoracic Society minor criteria, for prediction of IRVS. RESULTS Of 1,770 enrolled patients, 115 required IRVS (6.5%). Using the logistic regression model, PCT concentration had a strong association with IRVS risk. Undetectable PCT (< 0.05 ng/mL) was associated with a 4% (95% CI, 3.1%-5.1%) risk of IRVS. For concentrations < 10 ng/mL, PCT had an approximate linear association with IRVS risk: for each 1 ng/mL increase in PCT, there was a 1% to 2% absolute increase in the risk of IRVS. With a PCT concentration of 10 ng/mL, the risk of IRVS was 22.4% (95% CI, 16.3%-30.1%) and remained relatively constant for all concentrations > 10 ng/mL. When added to each pneumonia severity score, PCT contributed significant additional risk information for the prediction of IRVS. CONCLUSIONS Serum PCT concentration was strongly associated with the risk of requiring IRVS among adults hospitalized with CAP and is potentially useful for guiding decisions about ICU admission.
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Affiliation(s)
- Wesley H Self
- Department of Emergency Medicine, Vanderbilt University Medical Center, Nashville, TN.
| | - Carlos G Grijalva
- Department of Health Policy, Vanderbilt University Medical Center, Nashville, TN
| | - Derek J Williams
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN
| | - Alison Woodworth
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, TN
| | - Robert A Balk
- Department of Internal Medicine, Division of Pulmonary and Critical Care Medicine, Rush University Medical Center, Chicago, IL
| | - Sherene Fakhran
- Department of Medicine, Division of Pulmonary, John H. Stroger, Jr Hospital of Cook County, Chicago, IL
| | - Yuwei Zhu
- Department of Biostatistics, Vanderbilt University Medical Center, Nashville, TN
| | - D Mark Courtney
- Department of Emergency Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - James Chappell
- Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, TN
| | - Evan J Anderson
- Department of Medicine, Division of Infectious Diseases, Emory University School of Medicine, Atlanta, GA
| | - Chao Qi
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - Grant W Waterer
- Department of Medicine, Division of Pulmonary and Critical Care, Northwestern University Feinberg School of Medicine, Chicago, IL; Departments of Medicine and Pharmacology, University of Western Australia, Perth, Australia
| | - Christopher Trabue
- Department of Medicine, University of Tennessee Health Science Center/Saint Thomas Health, Nashville, TN
| | - Anna M Bramley
- Influenza Division of the National Center for Immunizations and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, GA
| | - Seema Jain
- Influenza Division of the National Center for Immunizations and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, GA
| | - Kathryn M Edwards
- Department of Pediatrics, Vanderbilt University Medical Center, Nashville, TN
| | - Richard G Wunderink
- Department of Medicine, Division of Pulmonary and Critical Care, Northwestern University Feinberg School of Medicine, Chicago, IL
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24
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Diaz MH, Cross KE, Benitez AJ, Hicks LA, Kutty P, Bramley AM, Chappell JD, Hymas W, Patel A, Qi C, Williams DJ, Arnold SR, Ampofo K, Self WH, Grijalva CG, Anderson EJ, McCullers JA, Pavia AT, Wunderink RG, Edwards KM, Jain S, Winchell JM. Identification of Bacterial and Viral Codetections With Mycoplasma pneumoniae Using the TaqMan Array Card in Patients Hospitalized With Community-Acquired Pneumonia. Open Forum Infect Dis 2016; 3:ofw071. [PMID: 27191004 PMCID: PMC4867659 DOI: 10.1093/ofid/ofw071] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Accepted: 03/28/2016] [Indexed: 12/13/2022] Open
Abstract
Mycoplasma pneumoniae was detected in a number of patients with community-acquired pneumonia in a recent prospective study. To assess whether other pathogens were also detected in these patients, TaqMan Array Cards were used to test 216 M pneumoniae-positive respiratory specimens for 25 additional viral and bacterial respiratory pathogens. It is interesting to note that 1 or more codetections, predominantly bacterial, were identified in approximately 60% of specimens, with codetections being more common in children.
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Affiliation(s)
| | | | | | | | | | - Anna M Bramley
- Influenza Division , Centers for Disease Control, and Prevention , Atlanta, Georgia
| | | | - Weston Hymas
- University of Utah Health Sciences Center , Salt Lake City
| | - Anami Patel
- Le Bonheur Children's Hospital, Memphis, Tennessee; University of Tennessee Health Science Center, Memphis
| | - Chao Qi
- Northwestern University Feinberg School of Medicine , Chicago, Illinois
| | - Derek J Williams
- Vanderbilt University School of Medicine, Nashville, Tennessee; Vanderbilt Vaccine Research Program, Nashville, Tennessee
| | - Sandra R Arnold
- Le Bonheur Children's Hospital, Memphis, Tennessee; University of Tennessee Health Science Center, Memphis
| | - Krow Ampofo
- University of Utah Health Sciences Center , Salt Lake City
| | - Wesley H Self
- Vanderbilt University School of Medicine , Nashville, Tennessee
| | | | | | - Jonathan A McCullers
- Le Bonheur Children's Hospital, Memphis, Tennessee; University of Tennessee Health Science Center, Memphis; St. Jude Children's Research Hospital, Memphis, Tennessee
| | - Andrew T Pavia
- University of Utah Health Sciences Center , Salt Lake City
| | | | - Kathryn M Edwards
- Vanderbilt University School of Medicine, Nashville, Tennessee; Vanderbilt Vaccine Research Program, Nashville, Tennessee
| | - Seema Jain
- Influenza Division , Centers for Disease Control, and Prevention , Atlanta, Georgia
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25
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Stockmann C, Ampofo K, Killpack J, Williams DJ, Edwards K, Grijalva CG, Arnold SR, Mccullers JA, Anderson EJ, Wunderink RG, Self WH, Bramley AM, Jain S, Blaschke AJ. Procalcitonin Concentrations Among Hospitalized Children With Pneumonia: Associations With Etiology and Prognosis. Open Forum Infect Dis 2015. [DOI: 10.1093/ofid/ofv133.1309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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26
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Williams DJ, Zhu AQ, Self WH, Grijalva CG, Harrell F, Reed C, Stockmann C, Arnold SR, Ampofo K, Anderson E, Edwards K, Bramley AM, Finelli L, Wunderink R, Mccullers JA, Pavia A, Jain S. Predicting Severe Outcomes in Children Hospitalized with Community-Acquired Pneumonia. Open Forum Infect Dis 2015. [DOI: 10.1093/ofid/ofv131.14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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27
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Grijalva CG, Zhu Y, Williams DJ, Self WH, Ampofo K, Pavia AT, Stockmann CR, McCullers J, Arnold SR, Wunderink RG, Anderson EJ, Lindstrom S, Fry AM, Foppa IM, Finelli L, Bramley AM, Jain S, Griffin MR, Edwards KM. Association Between Hospitalization With Community-Acquired Laboratory-Confirmed Influenza Pneumonia and Prior Receipt of Influenza Vaccination. JAMA 2015; 314:1488-97. [PMID: 26436611 PMCID: PMC4688454 DOI: 10.1001/jama.2015.12160] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
IMPORTANCE Few studies have evaluated the relationship between influenza vaccination and pneumonia, a serious complication of influenza infection. OBJECTIVE To assess the association between influenza vaccination status and hospitalization for community-acquired laboratory-confirmed influenza pneumonia. DESIGN, SETTING, AND PARTICIPANTS The Etiology of Pneumonia in the Community (EPIC) study was a prospective observational multicenter study of hospitalizations for community-acquired pneumonia conducted from January 2010 through June 2012 at 4 US sites. In this case-control study, we used EPIC data from patients 6 months or older with laboratory-confirmed influenza infection and verified vaccination status during the influenza seasons and excluded patients with recent hospitalization, from chronic care residential facilities, and with severe immunosuppression. Logistic regression was used to calculate odds ratios, comparing the odds of vaccination between influenza-positive (case) and influenza-negative (control) patients with pneumonia, controlling for demographics, comorbidities, season, study site, and timing of disease onset. Vaccine effectiveness was estimated as (1 - adjusted odds ratio) × 100%. EXPOSURE Influenza vaccination, verified through record review. MAIN OUTCOMES AND MEASURES Influenza pneumonia, confirmed by real-time reverse-transcription polymerase chain reaction performed on nasal/oropharyngeal swabs. RESULTS Overall, 2767 patients hospitalized for pneumonia were eligible for the study; 162 (5.9%) had laboratory-confirmed influenza. Twenty-eight of 162 cases (17%) with influenza-associated pneumonia and 766 of 2605 controls (29%) with influenza-negative pneumonia had been vaccinated. The adjusted odds ratio of prior influenza vaccination between cases and controls was 0.43 (95% CI, 0.28-0.68; estimated vaccine effectiveness, 56.7%; 95% CI, 31.9%-72.5%). CONCLUSIONS AND RELEVANCE Among children and adults hospitalized with community-acquired pneumonia, those with laboratory-confirmed influenza-associated pneumonia, compared with those with pneumonia not associated with influenza, had lower odds of having received influenza vaccination.
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Affiliation(s)
- Carlos G. Grijalva
- Vanderbilt University School of Medicine, Nashville, TN, USA
- Geriatric Research Education Clinical Center (GRECC), VA Tennessee Valley, Nashville, TN, USA
| | - Yuwei Zhu
- Vanderbilt University School of Medicine, Nashville, TN, USA
| | | | - Wesley H. Self
- Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Krow Ampofo
- University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Andrew T. Pavia
- University of Utah School of Medicine, Salt Lake City, UT, USA
| | | | | | | | | | | | | | - Alicia M. Fry
- Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Ivo M. Foppa
- Centers for Disease Control and Prevention, Atlanta, GA, USA
- Battelle, Atlanta, GA, USA
| | - Lyn Finelli
- Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Anna M. Bramley
- Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Seema Jain
- Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Marie R. Griffin
- Vanderbilt University School of Medicine, Nashville, TN, USA
- Geriatric Research Education Clinical Center (GRECC), VA Tennessee Valley, Nashville, TN, USA
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28
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Jain S, Self WH, Wunderink RG, Fakhran S, Balk R, Bramley AM, Reed C, Grijalva CG, Anderson EJ, Courtney DM, Chappell JD, Qi C, Hart EM, Carroll F, Trabue C, Donnelly HK, Williams DJ, Zhu Y, Arnold SR, Ampofo K, Waterer GW, Levine M, Lindstrom S, Winchell JM, Katz JM, Erdman D, Schneider E, Hicks LA, McCullers JA, Pavia AT, Edwards KM, Finelli L. Community-Acquired Pneumonia Requiring Hospitalization among U.S. Adults. N Engl J Med 2015; 373:415-27. [PMID: 26172429 PMCID: PMC4728150 DOI: 10.1056/nejmoa1500245] [Citation(s) in RCA: 1491] [Impact Index Per Article: 165.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
BACKGROUND Community-acquired pneumonia is a leading infectious cause of hospitalization and death among U.S. adults. Incidence estimates of pneumonia confirmed radiographically and with the use of current laboratory diagnostic tests are needed. METHODS We conducted active population-based surveillance for community-acquired pneumonia requiring hospitalization among adults 18 years of age or older in five hospitals in Chicago and Nashville. Patients with recent hospitalization or severe immunosuppression were excluded. Blood, urine, and respiratory specimens were systematically collected for culture, serologic testing, antigen detection, and molecular diagnostic testing. Study radiologists independently reviewed chest radiographs. We calculated population-based incidence rates of community-acquired pneumonia requiring hospitalization according to age and pathogen. RESULTS From January 2010 through June 2012, we enrolled 2488 of 3634 eligible adults (68%). Among 2320 adults with radiographic evidence of pneumonia (93%), the median age of the patients was 57 years (interquartile range, 46 to 71); 498 patients (21%) required intensive care, and 52 (2%) died. Among 2259 patients who had radiographic evidence of pneumonia and specimens available for both bacterial and viral testing, a pathogen was detected in 853 (38%): one or more viruses in 530 (23%), bacteria in 247 (11%), bacterial and viral pathogens in 59 (3%), and a fungal or mycobacterial pathogen in 17 (1%). The most common pathogens were human rhinovirus (in 9% of patients), influenza virus (in 6%), and Streptococcus pneumoniae (in 5%). The annual incidence of pneumonia was 24.8 cases (95% confidence interval, 23.5 to 26.1) per 10,000 adults, with the highest rates among adults 65 to 79 years of age (63.0 cases per 10,000 adults) and those 80 years of age or older (164.3 cases per 10,000 adults). For each pathogen, the incidence increased with age. CONCLUSIONS The incidence of community-acquired pneumonia requiring hospitalization was highest among the oldest adults. Despite current diagnostic tests, no pathogen was detected in the majority of patients. Respiratory viruses were detected more frequently than bacteria. (Funded by the Influenza Division of the National Center for Immunizations and Respiratory Diseases.).
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Affiliation(s)
- Seema Jain
- From the Centers for Disease Control and Prevention, Atlanta (S.J., A.M.B., C.R., M.L., S.L., J.M.W., J.M.K., D.E., E.S., L.A.H., L.F.); Vanderbilt University School of Medicine (W.H.S., C.G.G., J.D.C., F.C., D.J.W., Y.Z., K.M.E.) and University of Tennessee Health Science Center-Saint Thomas Health (C.T.), Nashville, and Le Bonheur Children's Hospital (S.R.A., J.A.M.), University of Tennessee Health Science Center (S.R.A., J.A.M.), and St. Jude Children's Research Hospital (J.A.M.), Memphis - all in Tennessee; Northwestern University Feinberg School of Medicine (R.G.W., E.J.A., D.M.C., C.Q., E.M.H., H.K.D., G.W.W.), John H. Stroger, Jr., Hospital of Cook County (S.F.), and Rush University Medical Center (R.B.) - all in Chicago; University of Utah Health Sciences Center, Salt Lake City (K.A., A.T.P.); and University of Western Australia, Perth (G.W.W.)
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Diaz MH, Benitez AJ, Cross KE, Hicks LA, Kutty P, Bramley AM, Chappell JD, Hymas W, Patel A, Qi C, Williams DJ, Arnold SR, Ampofo K, Self WH, Grijalva CG, Anderson EJ, McCullers JA, Pavia AT, Wunderink RG, Edwards KM, Jain S, Winchell JM. Molecular Detection and Characterization of Mycoplasma pneumoniae Among Patients Hospitalized With Community-Acquired Pneumonia in the United States. Open Forum Infect Dis 2015; 2:ofv106. [PMID: 26284257 PMCID: PMC4536330 DOI: 10.1093/ofid/ofv106] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Accepted: 07/06/2015] [Indexed: 11/24/2022] Open
Abstract
We report molecular characteristics of M. pneumoniae in respiratory specimens from children and adults hospitalized with CAP. The P1 type 1 genotype and MLVA type 4/5/7/2 predominated, but proportions of types differed between children and adults. Macrolide resistance was rare. Background. Mycoplasma pneumoniae is a common cause of community-acquired pneumonia (CAP). The molecular characteristics of M pneumoniae detected in patients hospitalized with CAP in the United States are poorly described. Methods. We performed molecular characterization of M pneumoniae in nasopharyngeal/oropharyngeal swabs from children and adults hospitalized with CAP in the Centers for Disease Control and Prevention Etiology of Pneumonia in the Community (EPIC) study, including P1 typing, multilocus variable-number tandem-repeat analysis (MLVA), and macrolide susceptibility genotyping. Results. Of 216 M pneumoniae polymerase chain reaction-positive specimens, 40 (18.5%) were obtained from adults and 176 (81.5%) from children. P1 type distribution differed between adults (64% type 1 and 36% type 2) and children (84% type 1, 13% type 2, and 3% variant) (P < .05) and among sites (P < .01). Significant differences in the proportions of MLVA types 4/5/7/2 and 3/5/6/2 were also observed by age group (P < .01) and site (P < .01). A macrolide-resistant genotype was identified in 7 (3.5%) specimens, 5 of which were from patients who had recently received macrolide therapy. No significant differences in clinical characteristics were identified among patients with various strain types or between macrolide-resistant and -sensitive M pneumoniae infections. Conclusions. The P1 type 1 genotype and MLVA type 4/5/7/2 predominated, but there were differences between children and adults and among sites. Macrolide resistance was rare. Differences in strain types did not appear to be associated with differences in clinical outcomes. Whole genome sequencing of M pneumoniae may help identify better ways to characterize strains.
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Affiliation(s)
| | | | | | | | | | - Anna M Bramley
- Influenza Division , Centers for Disease Control and Prevention , Atlanta, Georgia
| | | | - Weston Hymas
- University of Utah Health Sciences Center , Salt Lake City
| | - Anami Patel
- Le Bonheur Children's Hospital ; University of Tennessee Health Science Center
| | - Chao Qi
- Northwestern University Feinberg School of Medicine , Chicago, Illinois
| | - Derek J Williams
- Vanderbilt University School of Medicine , Nashville, Tennessee ; Vanderbilt Vaccine Research Program , Nashville
| | - Sandra R Arnold
- Le Bonheur Children's Hospital ; University of Tennessee Health Science Center
| | - Krow Ampofo
- University of Utah Health Sciences Center , Salt Lake City
| | - Wesley H Self
- Vanderbilt University School of Medicine , Nashville, Tennessee
| | | | | | - Jonathan A McCullers
- Le Bonheur Children's Hospital ; University of Tennessee Health Science Center ; St. Jude Children's Research Hospital , Memphis, Tennessee
| | - Andrew T Pavia
- University of Utah Health Sciences Center , Salt Lake City
| | | | - Kathryn M Edwards
- Vanderbilt University School of Medicine , Nashville, Tennessee ; Vanderbilt Vaccine Research Program , Nashville
| | - Seema Jain
- Influenza Division , Centers for Disease Control and Prevention , Atlanta, Georgia
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Self WH, Williams DJ, Zhu Y, Ampofo K, Pavia AT, Chappell JD, Hymas WC, Stockmann C, Bramley AM, Schneider E, Erdman D, Finelli L, Jain S, Edwards KM, Grijalva CG. Respiratory Viral Detection in Children and Adults: Comparing Asymptomatic Controls and Patients With Community-Acquired Pneumonia. J Infect Dis 2015; 213:584-91. [PMID: 26180044 PMCID: PMC4721902 DOI: 10.1093/infdis/jiv323] [Citation(s) in RCA: 177] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Accepted: 05/22/2015] [Indexed: 01/18/2023] Open
Abstract
BACKGROUND The clinical significance of viruses detected in patients with community-acquired pneumonia (CAP) is often unclear. METHODS We conducted a prospective study to identify the prevalence of 13 viruses in the upper respiratory tract of patients with CAP and concurrently enrolled asymptomatic controls with real-time reverse-transcriptase polymerase chain reaction. We compared age-stratified prevalence of each virus between patients with CAP and controls and used multivariable logistic regression to calculate attributable fractions (AFs). RESULTS We enrolled 1024 patients with CAP and 759 controls. Detections of influenza, respiratory syncytial virus, and human metapneumovirus were substantially more common in patients with CAP of all ages than in controls (AFs near 1.0). Parainfluenza and coronaviruses were also more common among patients with CAP (AF, 0.5-0.75). Rhinovirus was associated with CAP among adults (AF, 0.93) but not children (AF, 0.02). Adenovirus was associated with CAP only among children <2 years old (AF, 0.77). CONCLUSIONS The probability that a virus detected with real-time reverse-transcriptase polymerase chain reaction in patients with CAP contributed to symptomatic disease varied by age group and specific virus. Detections of influenza, respiratory syncytial virus, and human metapneumovirus among patients with CAP of all ages probably indicate an etiologic role, whereas detections of parainfluenza, coronaviruses, rhinovirus, and adenovirus, especially in children, require further scrutiny.
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Affiliation(s)
- Wesley H Self
- Department of Emergency Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Derek J Williams
- Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Yuwei Zhu
- Department of Biostatistics, Vanderbilt University School of Medicine, Nashville, Tennessee
| | | | | | - James D Chappell
- Department of Pathology, Microbiology & Immunology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | | | - Chris Stockmann
- Department of Pediatrics, University of Utah Health Sciences Center, Salt Lake City
| | - Anna M Bramley
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | | | - Dean Erdman
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Lyn Finelli
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Seema Jain
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Kathryn M Edwards
- Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Carlos G Grijalva
- Department of Health Policy, Vanderbilt University School of Medicine, Nashville, Tennessee
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Williams DJ, Edwards KM, Self WH, Zhu Y, Ampofo K, Pavia AT, Hersh AL, Arnold SR, McCullers JA, Hicks LA, Bramley AM, Jain S, Grijalva CG. Antibiotic Choice for Children Hospitalized With Pneumonia and Adherence to National Guidelines. Pediatrics 2015; 136:44-52. [PMID: 26101356 PMCID: PMC4485005 DOI: 10.1542/peds.2014-3047] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
INTRODUCTION The 2011 national guidelines for the management of childhood community-acquired pneumonia (CAP) recommended narrow-spectrum antibiotics (eg, ampicillin) for most children hospitalized with CAP. We assessed the impact of these guidelines on antibiotic prescribing at 3 children's hospitals. METHODS Children hospitalized with clinical and radiographic CAP were enrolled from January 1, 2010, through June 30, 2012, at 3 hospitals in Tennessee and Utah as part of the Centers for Disease Control and Prevention Etiology of Pneumonia in the Community study. Antibiotic selection was determined by the treating provider. The impact of the guidelines and hospital-level implementation efforts was determined by assessing the monthly percentage of enrolled children receiving third-generation cephalosporins or penicillin/ampicillin. Segmented linear regression was used to compare observed antibiotic selection in the postguideline period with expected antibiotic use projected from preguideline months. RESULTS Overall, 2121 children were included. During the preguideline period, 52.8% (interquartile range 47.8-56.6) of children with CAP received third-generation cephalosporins, whereas 2.7% (2.1, 7.0) received penicillin/ampicillin. By 9 months postguidelines, third-generation cephalosporin use declined (absolute difference -12.4% [95% confidence interval -19.8% to -5.1%]), whereas penicillin/ampicillin use increased (absolute difference 11.3% [4.3%-18.3%]). The most substantial changes were noted at those institutions that implemented guideline-related dissemination activities. CONCLUSIONS After publication of national guidelines, third-generation cephalosporin use declined and penicillin/ampicillin use increased among children hospitalized with CAP. Changes were more apparent among those institutions that proactively disseminated the guidelines, suggesting that targeted, hospital-based efforts are important for timely implementation of guideline recommendations.
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Affiliation(s)
- Derek J. Williams
- Divisions of Hospital Medicine and,Department of Pediatrics, Vanderbilt University School of Medicine, Vanderbilt Vaccine Research Program, Nashville, Tennessee
| | - Kathryn M. Edwards
- Infectious Diseases, Monroe Carell Jr. Children’s Hospital, and,Department of Pediatrics, Vanderbilt University School of Medicine, Vanderbilt Vaccine Research Program, Nashville, Tennessee
| | | | | | - Krow Ampofo
- Division of Infectious Diseases, and ,Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, Utah
| | - Andrew T. Pavia
- Division of Infectious Diseases, and ,Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, Utah
| | - Adam L. Hersh
- Division of Infectious Diseases, and ,Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, Utah
| | - Sandra R. Arnold
- Division of Infectious Diseases, LeBonheur Children’s Hospital, and ,Department of Pediatrics, University of Tennessee Health Sciences Center, Memphis, Tennessee; and
| | - Jonathan A. McCullers
- Division of Infectious Diseases, LeBonheur Children’s Hospital, and ,Department of Pediatrics, University of Tennessee Health Sciences Center, Memphis, Tennessee; and
| | - Lauri A. Hicks
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Anna M. Bramley
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Seema Jain
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Carlos G. Grijalva
- Health Policy, Vanderbilt University School of Medicine, Nashville, Tennessee
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Wolf RB, Edwards K, Grijalva CG, Self WH, Zhu Y, Chappell J, Bramley AM, Jain S, Williams DJ. Time to clinical stability among children hospitalized with pneumonia. J Hosp Med 2015; 10:380-3. [PMID: 25919391 PMCID: PMC4456292 DOI: 10.1002/jhm.2370] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/25/2014] [Revised: 03/21/2015] [Accepted: 04/02/2015] [Indexed: 01/05/2023]
Abstract
We evaluated the performance of time to clinical stability (TCS), a longitudinal outcome measure using 4 physiologic parameters (temperature, heart rate, respiratory rate, and use of supplemental oxygen), among children enrolled in a prospective study of pneumonia hospitalizations. We calculated the time from admission to normalization for each of the 4 parameters individually along with various combinations of these parameters (≥2 parameters). We assessed for agreement between the combined TCS measures and both hospital length of stay and an ordinal severity scale (nonsevere, severe, and very severe). Overall, 323 (96.7%) of 334 included children had ≥1 parameter abnormal on admission; 70 (21%) children had ≥1 parameter abnormal at discharge. For the 4 combined measures, median TCS decreased with increasing age. Increasing TCS was associated with both longer length of stay and increasing disease severity. The simplest combined measure incorporating only respiratory rate and need for supplemental oxygen performed similarly to more complex measures including additional parameters. Our study demonstrates that longitudinal TCS measures may be useful in children with pneumonia, both in clinical settings to assess recovery and readiness for discharge, and as an outcome measure in research and quality assessments. Additional study is needed to further validate our findings.
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Affiliation(s)
- Rachel B Wolf
- The Monroe Carell Jr. Children's Hospital at Vanderbilt, Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Kathryn Edwards
- The Monroe Carell Jr. Children's Hospital at Vanderbilt, Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Carlos G Grijalva
- Department of Health Policy, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Wesley H Self
- Department of Emergency Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Yuwei Zhu
- Department of Biostatistics, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - James Chappell
- Department of Pathology, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Anna M Bramley
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Seema Jain
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Derek J Williams
- The Monroe Carell Jr. Children's Hospital at Vanderbilt, Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, Tennessee
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Jain S, Williams DJ, Arnold SR, Ampofo K, Bramley AM, Reed C, Stockmann C, Anderson EJ, Grijalva CG, Self WH, Zhu Y, Patel A, Hymas W, Chappell JD, Kaufman RA, Kan JH, Dansie D, Lenny N, Hillyard DR, Haynes LM, Levine M, Lindstrom S, Winchell JM, Katz JM, Erdman D, Schneider E, Hicks LA, Wunderink RG, Edwards KM, Pavia AT, McCullers JA, Finelli L. Community-acquired pneumonia requiring hospitalization among U.S. children. N Engl J Med 2015; 372:835-45. [PMID: 25714161 PMCID: PMC4697461 DOI: 10.1056/nejmoa1405870] [Citation(s) in RCA: 1062] [Impact Index Per Article: 118.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
BACKGROUND Incidence estimates of hospitalizations for community-acquired pneumonia among children in the United States that are based on prospective data collection are limited. Updated estimates of pneumonia that has been confirmed radiographically and with the use of current laboratory diagnostic tests are needed. METHODS We conducted active population-based surveillance for community-acquired pneumonia requiring hospitalization among children younger than 18 years of age in three hospitals in Memphis, Nashville, and Salt Lake City. We excluded children with recent hospitalization or severe immunosuppression. Blood and respiratory specimens were systematically collected for pathogen detection with the use of multiple methods. Chest radiographs were reviewed independently by study radiologists. RESULTS From January 2010 through June 2012, we enrolled 2638 of 3803 eligible children (69%), 2358 of whom (89%) had radiographic evidence of pneumonia. The median age of the children was 2 years (interquartile range, 1 to 6); 497 of 2358 children (21%) required intensive care, and 3 (<1%) died. Among 2222 children with radiographic evidence of pneumonia and with specimens available for bacterial and viral testing, a viral or bacterial pathogen was detected in 1802 (81%), one or more viruses in 1472 (66%), bacteria in 175 (8%), and both bacterial and viral pathogens in 155 (7%). The annual incidence of pneumonia was 15.7 cases per 10,000 children (95% confidence interval [CI], 14.9 to 16.5), with the highest rate among children younger than 2 years of age (62.2 cases per 10,000 children; 95% CI, 57.6 to 67.1). Respiratory syncytial virus was more common among children younger than 5 years of age than among older children (37% vs. 8%), as were adenovirus (15% vs. 3%) and human metapneumovirus (15% vs. 8%). Mycoplasma pneumoniae was more common among children 5 years of age or older than among younger children (19% vs. 3%). CONCLUSIONS The burden of hospitalization for children with community-acquired pneumonia was highest among the very young, with respiratory viruses the most commonly detected causes of pneumonia. (Funded by the Influenza Division of the National Center for Immunization and Respiratory Diseases.).
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Affiliation(s)
- Seema Jain
- Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Derek J. Williams
- Vanderbilt University School of Medicine, Nashville, TN, USA
- Vanderbilt Vaccine Research Program, Nashville, TN, USA
| | - Sandra R. Arnold
- Le Bonheur Children's Hospital, Memphis, TN, USA
- University of Tennessee Health Science Center, Memphis, TN, USA
| | - Krow Ampofo
- University of Utah Health Sciences Center, Salt Lake City, UT, USA
| | - Anna M. Bramley
- Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Carrie Reed
- Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Chris Stockmann
- University of Utah Health Sciences Center, Salt Lake City, UT, USA
| | - Evan J. Anderson
- Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | | | - Wesley H. Self
- Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Yuwei Zhu
- Vanderbilt University School of Medicine, Nashville, TN, USA
| | - Anami Patel
- Le Bonheur Children's Hospital, Memphis, TN, USA
- University of Tennessee Health Science Center, Memphis, TN, USA
| | - Weston Hymas
- University of Utah Health Sciences Center, Salt Lake City, UT, USA
| | | | - Robert A. Kaufman
- University of Tennessee Health Science Center, Memphis, TN, USA
- St. Jude Children's Research Hospital, Memphis, TN, USA
| | - J. Herman Kan
- Vanderbilt University School of Medicine, Nashville, TN, USA
| | - David Dansie
- University of Utah Health Sciences Center, Salt Lake City, UT, USA
| | - Noel Lenny
- Le Bonheur Children's Hospital, Memphis, TN, USA
- University of Tennessee Health Science Center, Memphis, TN, USA
| | | | - Lia M. Haynes
- Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Min Levine
- Centers for Disease Control and Prevention, Atlanta, GA, USA
| | | | | | | | - Dean Erdman
- Centers for Disease Control and Prevention, Atlanta, GA, USA
| | | | - Lauri A. Hicks
- Centers for Disease Control and Prevention, Atlanta, GA, USA
| | | | - Kathryn M. Edwards
- Vanderbilt University School of Medicine, Nashville, TN, USA
- Vanderbilt Vaccine Research Program, Nashville, TN, USA
| | - Andrew T. Pavia
- University of Utah Health Sciences Center, Salt Lake City, UT, USA
| | - Jonathan A. McCullers
- Le Bonheur Children's Hospital, Memphis, TN, USA
- University of Tennessee Health Science Center, Memphis, TN, USA
- St. Jude Children's Research Hospital, Memphis, TN, USA
| | - Lyn Finelli
- Centers for Disease Control and Prevention, Atlanta, GA, USA
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Schlaberg R, Queen K, Simmon K, Tardif K, Stockmann C, Flygare S, Kennedy B, Voelkerding K, Bramley AM, Eilbeck K, Yandell M, Jain S, Pavia A, Tong S, Ampofo K. 779Viral Pathogen Detection by Metagenomics and Panviral PCR in Children with Pneumonia with no Identifiable Etiology: Preliminary Results from the CDC Etiology of Pneumonia in the Community (EPIC) Study. Open Forum Infect Dis 2014. [DOI: 10.1093/ofid/ofu052.487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Millman AJ, Finelli L, Bramley AM, Peacock G, Williams DJ, Arnold SR, Grijalva CG, Anderson EJ, Mccullers JA, Ampofo K, Pavia A, Edwards K, Jain S. 780Clinical Characteristics And Outcomes among Children with Neurological Disorders Hospitalized with Community-acquired Pneumonia (CAP) in the Etiology of Pneumonia in the Community (EPIC) Study. Open Forum Infect Dis 2014. [PMCID: PMC5782159 DOI: 10.1093/ofid/ofu052.488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Ganatra RB, McKenna JJ, Bramley AM, Skarbinski J, Fry AM, Finelli L, Jain S. Adults with diabetes hospitalized with pandemic influenza A(H1N1)pdm09--U.S. 2009. Diabetes Care 2013; 36:e94. [PMID: 23801817 PMCID: PMC3687328 DOI: 10.2337/dc13-0005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
| | - John J. McKenna
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Anna M. Bramley
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | | | - Alicia M. Fry
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Lyn Finelli
- Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Seema Jain
- Centers for Disease Control and Prevention, Atlanta, Georgia
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McKenna JJ, Bramley AM, Skarbinski J, Fry AM, Finelli L, Jain S. Asthma in patients hospitalized with pandemic influenza A(H1N1)pdm09 virus infection-United States, 2009. BMC Infect Dis 2013; 13:57. [PMID: 23369034 PMCID: PMC3585510 DOI: 10.1186/1471-2334-13-57] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Accepted: 01/29/2013] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND Asthma was the most common co-morbidity among patients hospitalized with pandemic influenza A(H1N1)pdm09 [pH1N1] infection. The objective was to compare characteristics of hospitalized pH1N1 patients with and without asthma and assess factors associated with severity among asthma patients. METHODS Patient data were derived from two 2009 pandemic case-series of U.S. pH1N1 hospitalizations. A case was defined as a person ≥ 2 years old hospitalized with laboratory-confirmed pH1N1. Asthma status was determined through chart review. RESULTS Among 473 cases, 29% had asthma. Persons with asthma were more likely to be 2-17 years old (39% vs. 30%, p = 0.04) and black (29% vs. 18%, p < 0.01), and have chronic obstructive pulmonary disease (13% vs. 9%, p = 0.04) but less likely to have pneumonia (37% vs. 47%, p = 0.05), need mechanical ventilation (13% vs. 23%, p = 0.02), and die (4% vs. 10%, p = 0.04) than those without asthma. Among patients with asthma, those admitted to an intensive care unit (ICU) or who died (n = 38) compared with survivors not admitted to an ICU (n = 99) were more likely to have pneumonia on admission (60% vs. 27%, p < 0.01) or acute respiratory distress syndrome (24% vs. 0%, p < 0.01) and less likely to receive influenza antiviral agents ≤ 2 days of admission (73% vs. 92%, p = 0.02). CONCLUSIONS The majority of persons with asthma had an uncomplicated course; however, severe disease, including ICU admission and death, occurred in asthma patients who presented with pneumonia. Influenza antiviral agents should be started early in hospitalized patients with suspected influenza, including those with asthma.
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Affiliation(s)
- John J McKenna
- Influenza Division, Centers for Disease Control and Prevention Atlanta, Atlanta, GA, USA
- The CDC Experience Applied Epidemiology Fellow, Atlanta, GA, USA
- Present address: 1929 Huxley St., Madison, WI, 53704, USA
| | - Anna M Bramley
- Influenza Division, Centers for Disease Control and Prevention Atlanta, Atlanta, GA, USA
| | - Jacek Skarbinski
- Influenza Division, Centers for Disease Control and Prevention Atlanta, Atlanta, GA, USA
| | - Alicia M Fry
- Influenza Division, Centers for Disease Control and Prevention Atlanta, Atlanta, GA, USA
| | - Lyn Finelli
- Influenza Division, Centers for Disease Control and Prevention Atlanta, Atlanta, GA, USA
| | - Seema Jain
- Influenza Division, Centers for Disease Control and Prevention Atlanta, Atlanta, GA, USA
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Bramley AM, Dasgupta S, Skarbinski J, Kamimoto L, Fry AM, Finelli L, Jain S. Intensive care unit patients with 2009 pandemic influenza A (H1N1pdm09) virus infection - United States, 2009. Influenza Other Respir Viruses 2012; 6:e134-42. [PMID: 22672249 DOI: 10.1111/j.1750-2659.2012.00385.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND The influenza A (H1N1pdm09) [pH1N1] virus resulted in intensive care unit (ICU) admissions, acute respiratory distress syndrome (ARDS), and death. OBJECTIVES To describe the characteristics of ICU patients with pH1N1 virus infection in the United States during the spring and fall of 2009 and to describe the factors associated with severe complications including ARDS and death. PATIENTS/METHODS Through two national case-series conducted during spring and fall of 2009, medical charts were reviewed on ICU patients with laboratory-confirmed pH1N1 infection by real-time reverse-transcriptase polymerase chain reaction. RESULTS The majority (77%) of 154 patients hospitalized in an ICU were <50 years of age, and 65% had at least one underlying medical condition. One hundred and twenty-eight (83%) patients received influenza antiviral agents; 29% received treatment ≤ 2 days after illness onset. Forty-eight (38%) patients developed ARDS and 37 (24%) died. Patients with ARDS were more likely to be morbidly obese (36% versus 19%, P=0.04) and patients who died were less likely to have asthma (11% versus 28%, P=0.05). Compared with patients who received treatment ≥ 6 days after illness onset, patients treated ≤ 2 days after illness onset were less likely to develop ARDS (17% versus 37%, P<0.01) or die (7% versus 35%, P<0.01). CONCLUSIONS Among patients hospitalized in an ICU with pH1N1 virus infection, ARDS was a common complication, and one-quarter of patients died. Patients with asthma had less severe outcomes. Early treatment with influenza antiviral agents was likely beneficial, especially when initiated ≤ 2 days after illness onset.
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Affiliation(s)
- Anna M Bramley
- Centers for Disease Control and Prevention, Atlanta, GA 30333, USA.
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Jain S, Benoit SR, Skarbinski J, Bramley AM, Finelli L. Influenza-associated pneumonia among hospitalized patients with 2009 pandemic influenza A (H1N1) virus--United States, 2009. Clin Infect Dis 2012; 54:1221-9. [PMID: 22437239 DOI: 10.1093/cid/cis197] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Pneumonia was a common complication among hospitalized patients with 2009 pandemic influenza A H1N1 [pH1N1] in the United States in 2009. METHODS Through 2 national case series conducted during spring and fall of 2009, medical records were reviewed. A pneumonia case was defined as a hospitalized person with laboratory-confirmed pH1N1 virus and a chest radiographic report consistent with pneumonia based on agreement among 3 physicians. RESULTS Of 451 patients with chest radiographs performed, 195 (43%) had pneumonia (spring, 106 of 237 [45%]; fall, 89 of 214 [42%]). Compared with 256 patients without pneumonia, these 195 patients with pneumonia were more likely to be admitted to the intensive care unit (52% vs 16%), have acute respiratory distress syndrome (ARDS; 26% vs 2%), have sepsis (18% vs 3%), and die (17% vs 2%; P < .0001). One hundred eighteen (61%) of the patients with pneumonia had ≥1 underlying condition. Bacterial infections were reported in 13 patients with pneumonia and 2 patients without pneumonia. Patients with pneumonia, when compared with patients without pneumonia, were equally likely to receive influenza antiviral agents (78% vs 79%) but less likely to receive antiviral agents within ≤2 days of illness onset (28% vs 50%; P < .0001). CONCLUSIONS Hospitalized patients with pH1N1 and pneumonia were at risk for severe outcomes including ARDS, sepsis, and death; antiviral treatment was often delayed. In the absence of accurate pneumonia diagnostics, patients hospitalized with suspected influenza and lung infiltrates on chest radiography should receive early and aggressive treatment with antibiotics and influenza antiviral agents.
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Affiliation(s)
- Seema Jain
- Centers for Disease Control and Prevention, Atlanta, Georgia 30333, USA.
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Kelly SM, Leung SW, Apponi LH, Bramley AM, Tran EJ, Chekanova JA, Wente SR, Corbett AH. Recognition of polyadenosine RNA by the zinc finger domain of nuclear poly(A) RNA-binding protein 2 (Nab2) is required for correct mRNA 3'-end formation. J Biol Chem 2010; 285:26022-32. [PMID: 20554526 PMCID: PMC2924000 DOI: 10.1074/jbc.m110.141127] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Proteins bound to the poly(A) tail of mRNA transcripts, called poly(A)-binding proteins (Pabs), play critical roles in regulating RNA stability, translation, and nuclear export. Like many mRNA-binding proteins that modulate post-transcriptional processing events, assigning specific functions to Pabs is challenging because these processing events are tightly coupled to one another. To investigate the role that a novel class of zinc finger-containing Pabs plays in these coupled processes, we defined the mode of polyadenosine RNA recognition for the conserved Saccharomyces cerevisiae Nab2 protein and assessed in vivo consequences caused by disruption of RNA binding. The polyadenosine RNA recognition domain of Nab2 consists of three tandem Cys-Cys-Cys-His (CCCH) zinc fingers. Cells expressing mutant Nab2 proteins with decreased binding to polyadenosine RNA show growth defects as well as defects in poly(A) tail length but do not accumulate poly(A) RNA in the nucleus. We also demonstrate genetic interactions between mutant nab2 alleles and mutant alleles of the mRNA 3'-end processing machinery. Together, these data provide strong evidence that Nab2 binding to RNA is critical for proper control of poly(A) tail length.
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Affiliation(s)
- Seth M Kelly
- Departments of Biochemistry, Emory University School ofMedicine, Atlanta, Georgia 30322, USA
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41
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Jain S, Kamimoto L, Bramley AM, Schmitz AM, Benoit SR, Louie J, Sugerman DE, Druckenmiller JK, Ritger KA, Chugh R, Jasuja S, Deutscher M, Chen S, Walker JD, Duchin JS, Lett S, Soliva S, Wells EV, Swerdlow D, Uyeki TM, Fiore AE, Olsen SJ, Fry AM, Bridges CB, Finelli L. Hospitalized patients with 2009 H1N1 influenza in the United States, April-June 2009. N Engl J Med 2009; 361:1935-44. [PMID: 19815859 DOI: 10.1056/nejmoa0906695] [Citation(s) in RCA: 1198] [Impact Index Per Article: 79.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
BACKGROUND During the spring of 2009, a pandemic influenza A (H1N1) virus emerged and spread globally. We describe the clinical characteristics of patients who were hospitalized with 2009 H1N1 influenza in the United States from April 2009 to mid-June 2009. METHODS Using medical charts, we collected data on 272 patients who were hospitalized for at least 24 hours for influenza-like illness and who tested positive for the 2009 H1N1 virus with the use of a real-time reverse-transcriptase-polymerase-chain-reaction assay. RESULTS Of the 272 patients we studied, 25% were admitted to an intensive care unit and 7% died. Forty-five percent of the patients were children under the age of 18 years, and 5% were 65 years of age or older. Seventy-three percent of the patients had at least one underlying medical condition; these conditions included asthma; diabetes; heart, lung, and neurologic diseases; and pregnancy. Of the 249 patients who underwent chest radiography on admission, 100 (40%) had findings consistent with pneumonia. Of the 268 patients for whom data were available regarding the use of antiviral drugs, such therapy was initiated in 200 patients (75%) at a median of 3 days after the onset of illness. Data suggest that the use of antiviral drugs was beneficial in hospitalized patients, especially when such therapy was initiated early. CONCLUSIONS During the evaluation period, 2009 H1N1 influenza caused severe illness requiring hospitalization, including pneumonia and death. Nearly three quarters of the patients had one or more underlying medical conditions. Few severe illnesses were reported among persons 65 years of age or older. Patients seemed to benefit from antiviral therapy.
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Affiliation(s)
- Seema Jain
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA.
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Bramley AM, Bresee J, Finelli L. Pediatric influenza. Pediatr Nurs 2009; 35:335-345. [PMID: 20166462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Influenza viruses cause annual epidemics in the United States. Although the severity of influenza epidemics vary by season, the morbidity associated with annual influenza epidemics in children is considerable from year to year. Excess pediatric outpatient clinic visits, emergency department visits, hospitalizations, and deaths occur each influenza season and are more common among younger children and those with conditions that increase their risk for developing influenza-related complications. Vaccination is the most effective way to prevent influenza and its complications and is recommended for all children 6 months through 18 years of age. Antiviral treatment is another tool to prevent influenza and reduce the duration of illness and complications. This article will review the virological, clinical, and epidemiological features of seasonal influenza, as well as discuss seasonal influenza vaccination and antiviral therapy.
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Affiliation(s)
- Anna M Bramley
- Epidemiology and Prevention Branch, Influenza Division, National Center for Immunization and Respiratory Diseases, Atlanta, GA, USA
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Lund M, Bramley AM, Iyengar RG, Petersen J, Wood WC, Gabram SS. Factors that influence seeking second opinions, patient satisfaction, and education in breast cancer care: an internet-based study. Cancer Res 2009. [DOI: 10.1158/0008-5472.sabcs-3107] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Abstract #3107
Purpose: To examine factors associated with seeking second opinions, patient satisfaction, and education among a recently diagnosed internet-based breast cancer population. Methods: In 2007, 6970 of the 90,426 internet-registered female breast cancer patients completed an internet-based survey, developed jointly by members of the Department of Surgical Oncology at Emory University and the educational staff at the Healthcare business of Thomson Reuters, formerly Nexcura. After excluding caregivers (n=205), those not within 5 years of diagnosis (n=962) or for whom treatment information was missing (n=40), we analyzed 5763 patients. Chi-square tests were used to assess system characteristics and patient demographics by their second opinion, satisfaction, and informed status. Patient satisfaction was collapsed as low (1-3), moderate (4-6), or high (7-10). How informed patients considered themselves was combined into 3 categories: well-informed (well or very well informed), somewhat informed and uninformed (somewhat or very uninformed). Results: The majority of the 5763 patients were between ages 40 and 59 when diagnosed (75.43%), Caucasian (92.96%), currently married (76.33%), had a household income ≥ $50,000 (60.92%) and at least a 4-year college education (55.78%). Stage I and II cancers comprised 36.61 and 35.71% respectively. Over one-third (n=2039) sought a second opinion. Factors significantly associated with seeking a second opinion were higher socioeconomic or education status, feeling informed, receiving the initial diagnosis from a primary care physician or private community hospital, close proximity to the biopsy location, and less satisfaction with the initial biopsy experience. Patients highly satisfied with their second opinion (87.35%) were more likely to refer others (96.52%), use the second opinion facility for the next treatment (63.90%), and to not seek additional opinions (75.29%). Facility options and initially being treated with surgery or systemic therapy predicted high satisfaction with initial treatment. Medical oncologists were the most frequently cited primary source of breast cancer education (37.81%), followed by surgeons (30.57%), and the internet (12.77%). About 20% who cited these sources considered themselves somewhat or very uninformed. Conclusions: Women who seek information via the internet rely primarily on medical professionals for their breast cancer education. Factors related to the initial biopsy affect the likelihood of patients seeking a second opinion, satisfaction with second opinions can influence choices regarding the ensuing treatment steps, and factors associated with initial treatment influence patient satisfaction. Probing the issues underlying these findings could improve care for all.
Citation Information: Cancer Res 2009;69(2 Suppl):Abstract nr 3107.
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Affiliation(s)
- M Lund
- 1 Georgia Cancer Center of Excellence at Grady Hospital, Atlanta, GA
- 2 Epidemiology, Emory University - Rollins School of Public Health, Atlanta, GA
- 3 Hematology-Oncology, Emory University, Atlanta, GA
| | - AM Bramley
- 2 Epidemiology, Emory University - Rollins School of Public Health, Atlanta, GA
| | - RG Iyengar
- 1 Georgia Cancer Center of Excellence at Grady Hospital, Atlanta, GA
- 4 Surgery, Emory University, Atlanta, GA
| | - J Petersen
- 5 Thomson Healthcare of Thomson Reuters, Seattle, WA
| | - WC Wood
- 4 Surgery, Emory University, Atlanta, GA
| | - SS Gabram
- 1 Georgia Cancer Center of Excellence at Grady Hospital, Atlanta, GA
- 4 Surgery, Emory University, Atlanta, GA
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Bramley AM, Vitalis TZ, Wiggs BR, Hegele RG. Effects of respiratory syncytial virus persistence on airway responsiveness and inflammation in guinea-pigs. Eur Respir J 1999; 14:1061-7. [PMID: 10596691 DOI: 10.1183/09031936.99.14510619] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Recurrent wheezing and asthma often develop after acute respiratory syncytial virus (RSV) bronchiolitis, but the mechanisms of these sequelae are poorly understood. Using a guinea-pig model of human RSV lung infection, the effects of long-term viral persistence on three hallmarks of asthma: nonspecific airway responsiveness, airway inflammation and airway remodelling were examined. Guinea-pigs were studied 100 days after intranasal instillation of either human RSV or uninfected vehicle, using: 1) acetylcholine challenge to test for airway hyperresponsiveness (AHR); 2) lung histology to quantify the numbers of airway eosinophils and metachromatic cells (mast cells/basophils); 3) airway morphometry of the areas of the airway subepithelial connective tissue, smooth muscle and adventitia, to test for airway remodelling; and 4) immunohistochemistry to identify lung cells containing RSV antigens. The RSV-inoculated group had significantly elevated AHR and airway eosinophils compared to uninfected control animals (p<0.05). There were no significant differences between the two groups in terms of numbers of airway metachromatic cells, or the areas of subepithelial connective tissue, smooth muscle or adventitia. Viral proteins were identified by immunohistochemistry within several types of lung cells. In conclusion, long-term persistence of respiratory syncytial virus in the guinea-pig lung is associated with airway hyperresponsiveness and airway eosinophilia, and these changes may be pertinent to the pathogenesis of postbronchiolitis wheezing and asthma in children.
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Affiliation(s)
- A M Bramley
- University of British Columbia, Pulmonary Research Laboratory, St. Paul's Hospital, Vancouver, Canada
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Dakhama A, Bramley AM, Chan NG, McKay KO, Schellenberg RR, Hegele RG. Effect of respiratory syncytial virus on subsequent allergic sensitization to ovalbumin in guinea-pigs. Eur Respir J 1999; 13:976-82. [PMID: 10414392 DOI: 10.1034/j.1399-3003.1999.13e08.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Children with acute respiratory syncytial virus (RSV) bronchiolitis often develop recurrent wheezing, asthma and allergic sensitization, but the role of RSV in the pathogenesis of these sequelae is unclear. This study examined whether RSV infection potentiates subsequent allergic sensitization, airway hyperresponsiveness (AHR) and airway inflammation induced by repeated exposures to aerosolized ovalbumin (OA) in guinea-pigs. Guinea-pigs received either RSV or sham inoculum, followed by exposures to OA- or saline-containing aerosols to form the following groups: 1) noninfected, nonsensitized controls (sham/saline group); 2) RSV-infected, nonsensitized animals (RSV/ saline group); 3) noninfected, OA-sensitized animals (sham/OA group); 4) RSV infection and first OA exposure on the same day (RSV/OA group), and 5) RSV infection six days prior to first OA exposure (RSV6/OA group). Three days after the final aerosol exposure, circulating OA-specific immunoglobulin (Ig)G1 antibody titres and AHR to inhalation acetylcholine challenge were measured and morphometry performed to evaluate allergic inflammation of the airways. OA-exposed animals developed OA-specific IgG1 antibodies, AHR and airway eosinophilia (sham/OA, RSV/OA and RSV6/OA groups. RSV infection alone induced significant AHR and airway eosinophilia (RSV/saline group). RSV infection, and concomitant exposure to OA (RSV/OA group) enhanced OA-specific IgG1 antibodies, but not airway eosinophilia or AHR. Such increases were not observed in the RSV6/OA group. In conclusion, respiratory syncytial virus potentiates the production of ovalbumin-specific immunoglobulin G1 antibodies in guinea-pigs, but circulating titres of these antibodies do not reflect the extent of airway hyperresponsiveness or airway inflammation. In addition, respiratory syncytial virus infection alone can produce slight increases in airway hyperresponsiveness that are associated with increased numbers of eosinophils in the airways.
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Affiliation(s)
- A Dakhama
- Research Dept, Laval Hospital, St-Foy, Quebec, Canada
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Dakhama A, Chan NG, Ahmad HY, Bramley AM, Vitalis TZ, Hegele RG. Usefulness of bronchoalveolar lavage for diagnosis of acute and persistent respiratory syncytial virus lung infections in guinea pigs. Pediatr Pulmonol 1998; 26:396-404. [PMID: 9888214 DOI: 10.1002/(sici)1099-0496(199812)26:6<396::aid-ppul4>3.0.co;2-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
To investigate whether bronchoalveolar lavage (BAL) fluid specimens can be used to diagnose acute and persistent respiratory syncytial virus (RSV) lung infections in guinea pigs, we tested BAL fluid and lung tissue specimens for evidence of viral infection, and compared BAL cytology between infected and uninfected animals. RSV-inoculated guinea pigs were studied during acute bronchiolitis (days 3 and 7 postinoculation), convalescence (Day 14 postinoculation), and persistent infection (Days 28 and 60 postinoculation), and were compared to the sham-infected control animals. BAL and lung tissue specimens were cultured for virus and tested by immunocytochemistry for viral protein. A reverse transcription-polymerase chain reaction (RT-PCR) method was used to test for viral nucleic acid. Total and differential BAL cell counts were compared between RSV-inoculated and control animals on each study day. In BAL specimens, replicating RSV was isolated by culture in one out of four of the animals on Day 3 postinoculation; immunocytochemistry for RSV antigens was positive in all virus-exposed animals from Days 3-14 postinoculation, and viral nucleic acid was detected by RT-PCR in one-fourth of the animals on Day 3 postinoculation. In contrast, replicating virus, viral antigens, and viral nucleic acid were documented in lung tissues obtained from the same RSV-infected animals on all study days. BAL specimens of RSV-inoculated animals contained more eosinophils on all study days (two-tailed P value < 0.01) compared to the controls. The results of this animal study demonstrate that BAL fluid is not useful for diagnosis of persistent RSV infection. However, BAL fluid may be helpful for the documentation of acute RSV lung infection when immunocytochemistry may provide a more accurate test for virus detection than RT-PCR or viral culture.
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Affiliation(s)
- A Dakhama
- University of British Columbia Pulmonary Research Laboratory, St. Paul's Hospital, Vancouver, Canada
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47
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Chan NG, Bramley AM, Hegele RG. Comment on the workshop on Airway Inflammation and Remodelling in Asthma: implication for asthma therapy. Can Respir J 1998; 5:226,231. [PMID: 9729109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
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Abstract
Increased airway smooth muscle, resulting from either hyperplasia or hypertrophy, has been implicated as a cause of excessive bronchoconstriction in asthma despite the many methodologic limitations of studies to date. Our recent failure to demonstrate increased muscle volume in an asthmatic airway preparation having 3-fold greater shortening than nonasthmatic controls prompted us to reassess the quantity of muscle in asthmatic versus nonasthmatic airways. Smooth muscle was quantified in axially sectioned, 2nd- to 4th-generation bronchi, using standardized stereologic methods on high-magnification images of cross-sectional airway smooth muscle profiles in tissues from five asthmatic subjects and five nonasthmatic smokers. When data were normalized by total cross-sectional tissue area, no differences between the two groups (asthmatic versus nonasthmatic) were detected for the proportion of smooth muscle (3.45 +/- 0.81% versus 2.74 +/- 0.76%), extracellular matrix between muscle cells (1.65 +/- 0.46% versus 1.06 +/- 0.25%), or connective tissue within smooth muscle bundles (1.65 +/- 0.34% versus 1.53 +/- 0.59%). These methodologies for evaluating cross-sectional airway muscle in axial airway sections at high resolution provide no evidence of increased airway smooth muscle in asthmatic large airways, and suggest that differences in mechanical responses of asthmatic airways cannot be explained solely by the amount of smooth muscle.
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Affiliation(s)
- R J Thomson
- University of British Columbia Pulmonary Research Laboratory, St. Paul's Hospital, Vancouver, Canada
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Abstract
The recent demonstration of increased shortening of asthmatic airway smooth muscle could result from increased contractility of the muscle itself or from a decreased load that must be overcome by the smooth muscle to shorten. To evaluate the role of smooth muscle-associated extracellular matrix in limiting smooth muscle responses, we investigated the effect of collagenase on the mechanical responses of human bronchial smooth muscle strips. Contractile responses of second- to fourth-generation bronchi were evoked by electrical field stimulation, and measurements of length and tension were made at preloads between 0 and 2.5 g. The passive tension, active isometric, and isotonic responses were obtained at each preload before and after 90 min of incubation with 20 U/ml collagenase. Shortening to 10(-4) M histamine was also measured. Collagenase treatment caused a significant decrease in passive tension, with the most pronounced change occurring below Lmax (optimal length for force generation). At optimal lengths for shortening, the degree of shortening, expressed as a percentage of starting length, increased significantly from 8.9 +/- 1.4% before to 13.8 +/- 2.9% after collagenase treatment (n = 7) (p < 0.02). Shortening to histamine also increased from 14.3 +/- 2.5% before to 23.5 +/- 5.3% after collagenase treatment (n = 7) (p < 0.02). These results suggest that degradation of the collagenous matrix surrounding muscle in the airway wall reduces the load on the muscle, allowing increased smooth muscle shortening.
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Affiliation(s)
- A M Bramley
- UBC Pulmonary Research Laboratory, St. Paul's Hospital, Vancouver, British Columbia, Canada
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Bramley AM, Langlands JM, Jones AK, Burgoyne DL, Li Y, Andersen RJ, Salari H. Effects of IZP-94005 (contignasterol) on antigen-induced bronchial responsiveness in ovalbumin-sensitized guinea-pigs. Br J Pharmacol 1995; 115:1433-8. [PMID: 8564202 PMCID: PMC1908893 DOI: 10.1111/j.1476-5381.1995.tb16634.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
1. We have investigated the novel naturally occurring marine compound, IZP-94005 (contignasterol), as a potential anti-asthma agent, using both in vivo and in vitro models of allergen-induced bronchoconstriction and airway smooth muscle contraction. 2. Tracheal rings from ovalbumin (OA)-sensitized guinea-pigs were treated with various concentrations of IZP-94005 for 20 min prior to challenge with ovalbumin. IZP-94005 (3-30 microM) inhibited responses of sensitized tracheal rings stimulated with OA in a concentration-dependent manner, with an IC50 of 10 microM. 3. IZP-94005 (10 microM) had no effect on carbachol-induced contractions of sensitized guinea-pig tracheal rings, although it did inhibit histamine-induced responses of OA sensitized guinea-pig tracheal rings. 4. The effects of IZP-94005 in vivo were examined using OA-sensitized guinea-pigs which were tracheotomized under anaesthesia and placed in a body plethysmograph. Measurements of lung resistance and compliance were performed by isovolumetric analysis of volume and trans-pulmonary pressure. 5. IZP-94005 (50 and 200 micrograms kg-1), by inhalation 20 min prior to OA challenge caused significant inhibition of the increase in lung resistance induced by OA in sensitized guinea-pigs, compared to vehicle-treated animals. Nedocromil sodium (20 mg kg-1), with a similar protocol, also inhibited OA-induced responses in this model. 6. We therefore suggest that IZP-94005 is a good candidate for further investigation as a possible antiasthma agent.
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Affiliation(s)
- A M Bramley
- Inflazyme Pharmaceuticals Ltd, Vancouver, Canada
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