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Petrin S, Tiengo A, Longo A, Furlan M, Marafin E, Zavagnin P, Orsini M, Losasso C, Barco L. Uncommon Salmonella Infantis Variants with Incomplete Antigenic Formula in the Poultry Food Chain, Italy. Emerg Infect Dis 2024; 30:795-799. [PMID: 38526241 PMCID: PMC10977818 DOI: 10.3201/eid3004.231074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/26/2024] Open
Abstract
Uncommon Salmonella Infantis variants displaying only flagellar antigens phenotypically showed identical incomplete antigenic formula but differed by molecular serotyping. Although most formed rough colonies, all shared antimicrobial resistances and the presence of usg gene with wild-type Salmonella Infantis. Moreover, they were undistinguishable wild-type Salmonella Infantis by whole-genome sequencing.
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Affiliation(s)
| | | | - Alessandra Longo
- National and World Organisation for Animal Health Reference Laboratory for Salmonella, Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, Italy
| | - Maddalena Furlan
- National and World Organisation for Animal Health Reference Laboratory for Salmonella, Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, Italy
| | - Elisa Marafin
- National and World Organisation for Animal Health Reference Laboratory for Salmonella, Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, Italy
| | - Paola Zavagnin
- National and World Organisation for Animal Health Reference Laboratory for Salmonella, Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, Italy
| | - Massimiliano Orsini
- National and World Organisation for Animal Health Reference Laboratory for Salmonella, Istituto Zooprofilattico Sperimentale delle Venezie, Legnaro, Italy
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Salas JR, Gaire T, Quichocho V, Nicholson E, Volkova VV. Modelling the antimicrobial pharmacodynamics for bacterial strains with versus without acquired resistance to fluoroquinolones or cephalosporins. J Glob Antimicrob Resist 2022; 28:59-66. [PMID: 34922059 PMCID: PMC9006344 DOI: 10.1016/j.jgar.2021.10.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 05/03/2021] [Revised: 09/20/2021] [Accepted: 10/22/2021] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVES Antimicrobial resistance threatens therapeutic options for human and animal bacterial diseases worldwide. Current antimicrobial treatment regimens were designed against bacterial strains that were fully susceptible to them. To expand the useable lifetime of existing antimicrobial drug classes by modifying treatment regimens, data are needed on the antimicrobial pharmacodynamics (PD) against strains with reduced susceptibility. In this study, we generated and mathematically modelled the PD of the fluoroquinolone ciprofloxacin and the cephalosporin ceftriaxone against non-typhoidal Salmonella enterica subsp. enterica strains with varying levels of acquired resistance. METHODS We included Salmonella strains across categories of reduced susceptibility to fluoroquinolones or cephalosporins reported to date, including isolates from human infections, food-animal products sold in retail, and food-animal production. We generated PD data for each drug and strain via time-kill assay. Mathematical models were compared in their fit to represent the PD. The best-fit model's parameter values across the strain susceptibility categories were compared. RESULTS The inhibitory baseline sigmoid Imax (or Emax) model was best fit for the PD of each antimicrobial against a majority of the strains. There were statistically significant differences in the PD parameter values across the strain susceptibility categories for each antimicrobial. CONCLUSION The results demonstrate predictable multiparameter changes in the PD of these first-line antimicrobials depending on the Salmonella strain's susceptibility phenotype and specific genes conferring reduced susceptibility. The generated PD parameter estimates could be used to optimise treatment regimens against infections by strains with reduced susceptibility.
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Affiliation(s)
- Jessica R Salas
- Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS 66506, USA.
| | - Tara Gaire
- Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS 66506, USA
| | - Victoria Quichocho
- Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS 66506, USA
| | - Emily Nicholson
- Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS 66506, USA
| | - Victoriya V Volkova
- Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, KS 66506, USA
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Anuradha S, Samaddar A, Maurya A, Hada V, Narula H, Shrimali T, Gupta N, Kumar P, Singh K, Nag VL. Analysis of Blood Culture Data Influences Future Epidemiology of Bloodstream Infections: A 5-year Retrospective Study at a Tertiary Care Hospital in India. Indian J Crit Care Med 2021; 25:1258-1262. [PMID: 34866822 PMCID: PMC8608638 DOI: 10.5005/jp-journals-10071-23922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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] [Indexed: 11/23/2022] Open
Abstract
Background Blood cultures are the most significant samples received in a microbiology laboratory. Good quality control of pre-analytic, analytic, and post-analytic stages can have a significant impact on patient outcomes. Here, we present the improvements brought about by reviewing blood culture data with clinicians at a tertiary care institute in India. Methods Four-year blood culture data (phase I—February 2014–February 2018) were shared with clinicians in the clinical grand round. Several take-home messages were discussed in a quiz format, and a number of holistic quality control measures were implemented at different levels. Based on observable changes in blood culture reports, another dataset was analyzed and compared in phase II (April 2018–April 2019). Results In phase II, the blood culture contamination rate improved from 6 to 2% along with four times reduction in ICU isolates and three times increased isolation of salmonellae and pneumococci. The development of resistance in Klebsiella pneumoniae to carbapenems and piperacillin–tazobactam was reduced. Colistin resistance in ICU isolates hovered around 15%. Vaccine-preventable pneumococcal serotypes were predominant in the under-five age-group. Typhoidal salmonellae were more commonly isolated from adults with 50% showing sensitivity to pefloxacin and 97% to ampicillin, chloramphenicol, and cotrimoxazole. Candida parapsilosis was the leading non-albicans Candida (NAC). Fluconazole resistance was observed in 50% of NAC. Conclusion Reviewing blood culture data with clinicians mutually helped us to improve the overall quality of blood culture reports. It had a major impact on epidemiological trends and thus, found to be superior to just sharing an antibiogram with the clinicians. How to cite this article Sharma A, Samaddar A, Maurya A, Hada V, Narula H, Shrimali T, et al. Analysis of Blood Culture Data Influences Future Epidemiology of Bloodstream Infections: A 5-year Retrospective Study at a Tertiary Care Hospital in India. Indian J Crit Care Med 2021;25(11):1258–1262.
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Affiliation(s)
- Sharma Anuradha
- Department of Microbiology, All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
| | - Arghadip Samaddar
- Department of Microbiology, All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
| | - Anand Maurya
- Department of Microbiology, All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
| | - Vivek Hada
- Department of Microbiology, All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
| | - Himanshu Narula
- Department of Microbiology, All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
| | - Twishi Shrimali
- Department of Microbiology, All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
| | - Neeraj Gupta
- Department of Neonatology, All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
| | - Prawin Kumar
- Department of Pediatrics, All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
| | - Kuldeep Singh
- Department of Pediatrics, All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
| | - Vijaya Lakshmi Nag
- Department of Microbiology, All India Institute of Medical Sciences, Jodhpur, Rajasthan, India
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Obaro SK, Hassan-Hanga F, Olateju EK, Umoru D, Lawson L, Olanipekun G, Ibrahim S, Munir H, Ihesiolor G, Maduekwe A, Ohiaeri C, Adetola A, Shetima D, Jibir BW, Nakaura H, Kocmich N, Ajose T, Idiong D, Masokano K, Ifabiyi A, Ihebuzor N, Chen B, Meza J, Akindele A, Rezac-Elgohary A, Olaosebikan R, Suwaid S, Gambo M, Alter R, Davies HD, Fey PD. Salmonella Bacteremia Among Children in Central and Northwest Nigeria, 2008-2015. Clin Infect Dis 2016; 61 Suppl 4:S325-31. [PMID: 26449948 DOI: 10.1093/cid/civ745] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Etiologic agents of childhood bacteremia remain poorly defined in Nigeria. The absence of such data promotes indiscriminate use of antibiotics and delays implementation of appropriate preventive strategies. METHODS We established diagnostic laboratories for bacteremia surveillance at regional sites in central and northwest Nigeria. Acutely ill children aged <5 years with clinically suspected bacteremia were evaluated at rural and urban clinical facilities in the Federal Capital Territory, central region and in Kano, northwest Nigeria. Blood was cultured using the automated Bactec incubator system. RESULTS Between September 2008 and April 2015, we screened 10,133 children. Clinically significant bacteremia was detected in 609 of 4051 (15%) in the northwest and 457 of 6082 (7.5%) in the central region. Across both regions, Salmonella species account for 24%-59.8% of bacteremias and are the commonest cause of childhood bacteremia, with a predominance of Salmonella enterica serovar Typhi. The prevalence of resistance to ampicillin, chloramphenicol, and cotrimoxazole was 38.11%, with regional differences in susceptibility to different antibiotics but high prevalence of resistance to readily available oral antibiotics. CONCLUSIONS Salmonella Typhi is the leading cause of childhood bacteremia in central Nigeria. Expanded surveillance is planned to define the dynamics of transmission. The high prevalence of multidrug-resistant strains calls for improvement in environmental sanitation in the long term and vaccination in the short term.
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Affiliation(s)
- Stephen K Obaro
- Division of Pediatric Infectious Diseases Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha International Foundation Against Infectious Diseases in Nigeria, Abuja Department of Pediatrics Department of Pediatrics, University of Abuja Teaching Hospital, Gwagwalada
| | | | - Eyinade K Olateju
- Department of Pediatrics, University of Abuja Teaching Hospital, Gwagwalada
| | | | | | - Grace Olanipekun
- International Foundation Against Infectious Diseases in Nigeria, Abuja
| | - Sadeeq Ibrahim
- Department of Pediatrics Department of Medical Microbiology, Aminu Kano Teaching Hospital
| | - Huda Munir
- Department of Medical Microbiology, Aminu Kano Teaching Hospital
| | | | - Augustine Maduekwe
- Department of Pediatrics, Wuse General Hospital, Abuja, Federal Capital Territory
| | - Chinatu Ohiaeri
- Department of Pediatrics, Federal Medical Center, Keffi, Nassarawa State
| | | | - Denis Shetima
- Department of Pediatrics, National Hospital, Central Business Area, Abuja, Federal Capital Territory
| | - Binta W Jibir
- Department of Pediatrics, Murtala Specialist Hospital
| | | | | | - Therasa Ajose
- International Foundation Against Infectious Diseases in Nigeria, Abuja
| | - David Idiong
- International Foundation Against Infectious Diseases in Nigeria, Abuja Department of Microbiology, Bingham University, Karu, Nassarawa State
| | | | - Adeyemi Ifabiyi
- International Foundation Against Infectious Diseases in Nigeria, Abuja
| | - Nnenna Ihebuzor
- National Primary Health Care Development Agency, Abuja, Federal Capital Territory, Nigeria
| | - Baojiang Chen
- Department of Biostatistics, College of Public Health
| | - Jane Meza
- Department of Biostatistics, College of Public Health
| | - Adebayo Akindele
- International Foundation Against Infectious Diseases in Nigeria, Abuja
| | | | | | - Salman Suwaid
- Department of Pediatrics, Murtala Specialist Hospital
| | | | - Roxanne Alter
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha
| | - Herbert D Davies
- Division of Pediatric Infectious Diseases Department of Biostatistics, College of Public Health Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha
| | - Paul D Fey
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha
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Abstract
Foodborne pathogens cause >9 million illnesses annually. Food safety efforts address the entire food chain, but an essential strategy for preventing foodborne disease is educating consumers and food preparers. To better understand the epidemiology of foodborne disease and to direct prevention efforts, we examined incidence of Salmonella infection, Shiga toxin-producing Escherichia coli infection, and hemolytic uremic syndrome by census tract-level socioeconomic status (SES) in the Connecticut Foodborne Diseases Active Surveillance Network site for 2000-2011. Addresses of case-patients were geocoded to census tracts and linked to census tract-level SES data. Higher census tract-level SES was associated with Shiga toxin-producing Escherichia coli, regardless of serotype; hemolytic uremic syndrome; salmonellosis in persons ≥5 years of age; and some Salmonella serotypes. A reverse association was found for salmonellosis in children <5 years of age and for 1 Salmonella serotype. These findings will inform education and prevention efforts as well as further research.
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