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Pedersen K, van Schalkwyk J, Brewerton M, Jordan A, Cooke P. Penicillin cross-sensitivity in patients with confirmed peri-operative allergic hypersensitivity reactions to cefazolin: a retrospective observational study. Anaesthesia 2024; 79:208-210. [PMID: 37989486 DOI: 10.1111/anae.16185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/07/2023] [Indexed: 11/23/2023]
Affiliation(s)
- K Pedersen
- Te Toka Tumai Auckland, Auckland City Hospital, Auckland, New Zealand
| | - J van Schalkwyk
- Te Toka Tumai Auckland, Auckland City Hospital, Auckland, New Zealand
| | - M Brewerton
- Te Toka Tumai Auckland, Auckland City Hospital, Auckland, New Zealand
| | - A Jordan
- Te Toka Tumai Auckland, Auckland City Hospital, Auckland, New Zealand
| | - P Cooke
- Te Toka Tumai Auckland, Auckland City Hospital, Auckland, New Zealand
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Pedersen K, van Schalkwyk J, Brewerton M, Jordan A, Cooke P. Retrospective observational study of the incidence of peri-operative allergic hypersensitivity reactions to cefazolin. Anaesthesia 2023; 78:1502-1504. [PMID: 37451258 DOI: 10.1111/anae.16101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/30/2023] [Indexed: 07/18/2023]
Affiliation(s)
- K Pedersen
- Te Toka Tumai Auckland, Auckland City Hospital, Auckland, New Zealand
| | - J van Schalkwyk
- Te Toka Tumai Auckland, Auckland City Hospital, Auckland, New Zealand
| | - M Brewerton
- Te Toka Tumai Auckland, Auckland City Hospital, Auckland, New Zealand
| | - A Jordan
- Te Toka Tumai Auckland, Auckland City Hospital, Auckland, New Zealand
| | - P Cooke
- Te Toka Tumai Auckland, Auckland City Hospital, Auckland, New Zealand
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Pedersen K, Watt J, Maimone C, Hang H, Denys A, Schroder K, Suva LJ, Chen JR, Ronis MJJ. Deletion of NADPH oxidase 2 in chondrocytes exacerbates ethanol-mediated growth plate disruption in mice without major effects on bone architecture or gene expression. Alcohol Clin Exp Res (Hoboken) 2023; 47:2233-2247. [PMID: 38151780 DOI: 10.1111/acer.15203] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 09/12/2023] [Accepted: 09/25/2023] [Indexed: 12/29/2023]
Abstract
BACKGROUND Excess reactive oxygen species generated by NADPH oxidase 2 (Nox2) in response to ethanol exposure mediate aspects of skeletal toxicity including increased osteoclast differentiation and activity. Because perturbation of chondrocyte differentiation in the growth plate by ethanol could be prevented by dietary antioxidants, we hypothesized that Nox2 in the growth plate was involved in ethanol-associated reductions in longitudinal bone growth. METHODS Nox2 conditional knockout mice were generated, where the essential catalytic subunit of Nox2, cytochrome B-245 beta chain (Cybb), is deleted in chondrocytes using a Cre-Lox model with Cre expressed from the collagen 2a1 promoter (Col2a1-Cre). Wild-type and Cre-Lox mice were fed an ethanol Lieber-DeCarli-based diet or pair-fed a control diet for 8 weeks. RESULTS Ethanol treatment significantly reduced the number of proliferating chondrocytes in the growth plate, enhanced bone marrow adiposity, shortened femurs, reduced body length, reduced cortical bone volume, and decreased mRNA levels of a number of osteoblast and chondrocyte genes. Conditional knockout of Nox2 enzymatic activity in chondrocytes did not consistently prevent any ethanol effects. Rather, knockout mice had fewer proliferating chondrocytes than wild-type mice in both the ethanol- and control-fed animals. Additional analysis of tibia samples from Nox4 knockout mice showed that loss of Nox4 activity also reduced the number of proliferating chondrocytes and altered chondrocyte size in the growth plate. CONCLUSIONS Although Nox enzymatic activity regulates growth plate development, ethanol-associated disruption of the growth plate morphology is independent of ethanol-mediated increases in Nox2 activity.
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Affiliation(s)
- K Pedersen
- Department of Pharmacology and Experimental Therapeutics, Louisiana State University Health Science Center, New Orleans, Louisiana, USA
| | - J Watt
- Department of Pharmacology and Experimental Therapeutics, Louisiana State University Health Science Center, New Orleans, Louisiana, USA
| | - C Maimone
- Department of Pharmacology and Experimental Therapeutics, Louisiana State University Health Science Center, New Orleans, Louisiana, USA
| | - H Hang
- Department of Pharmacology and Experimental Therapeutics, Louisiana State University Health Science Center, New Orleans, Louisiana, USA
| | - A Denys
- Department of Pharmacology and Experimental Therapeutics, Louisiana State University Health Science Center, New Orleans, Louisiana, USA
| | - K Schroder
- Institute of Physiology I, Goethe-University, Frankfurt, Germany
| | - L J Suva
- Department of Veterinary Physiology and Pharmacology, Texas A&M University, College Station, Texas, USA
| | - J-R Chen
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA
| | - M J J Ronis
- Department of Pharmacology and Experimental Therapeutics, Louisiana State University Health Science Center, New Orleans, Louisiana, USA
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Pedersen K, Schlichter BR. Improving Predictability and Effectiveness in Preventive Digital Health Interventions: Scoping Review. Interact J Med Res 2023; 12:e40205. [PMID: 37471129 PMCID: PMC10401197 DOI: 10.2196/40205] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 11/01/2022] [Accepted: 06/09/2023] [Indexed: 07/21/2023] Open
Abstract
BACKGROUND Lifestyle-related diseases caused by inadequate diet and physical activity cause premature death, loss of healthy life years, and increased health care costs. Randomized controlled trial (RCT) studies indicate that preventive digital health interventions (P-DHIs) can be effective in preventing these health problems, but the results of these studies are mixed. Adoption studies have identified multiple factors related to individuals and the context in which they live that complicate the transfer of positive results from RCT studies to practical use. Implementation studies have revealed barriers to the large-scale implementation of mobile health (mHealth) solutions in general. Consequently, there is no clear path to delivering predictable outcomes from P-DHIs and achieving effectiveness when scaling up interventions to reduce health problems in society. OBJECTIVE This research aimed to expand our understanding of how to increase the outcome predictability of P-DHIs by focusing on physical activity and diet behaviors and amplify our understanding of how to improve effectiveness in large-scale implementations. METHODS The research objective was pursued through a multidisciplinary scoping review. This scoping review used the PRISMA-ScR (Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews) as a guide. A comprehensive search of Web of Science and PubMed limited to English-language journal articles published before January 2022 was conducted. Google Scholar was used for hand searches. Information systems theory was used to identify key constructs influencing outcomes of IT in general. Public health and mHealth literature were used to identify factors influencing the adoption of, outcomes from, and implementation of P-DHIs. Finally, the P-DHI investment model was developed based on information systems constructs and factors from the public health and mHealth literature. RESULTS In total, 203 articles met the eligibility criteria. The included studies used a variety of methodologies, including literature reviews, interviews, surveys, and RCT studies. The P-DHI investment model suggests which constructs and related factors should be emphasized to increase the predictability of P-DHI outcomes and improve the effectiveness of large-scale implementations. CONCLUSIONS The research suggests that outcome predictability could be improved by including descriptions of the constructs and factors in the P-DHI investment model when reporting from empirical studies. Doing so would increase our understanding of when and why P-DHIs succeed or fail. The effectiveness of large-scale implementations may be improved by using the P-DHI investment model to evaluate potential difficulties and possibilities in implementing P-DHIs to create better environments for their use before investing in them and when designing and implementing them. The cost-effectiveness of large-scale implementations is unknown; implementations are far more complicated than just downloading and using apps, and there is uncertainty accompanying implementations given the lack of coordinated control over the constructs and factors that influence the outcome.
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Affiliation(s)
- Keld Pedersen
- Information Systems, Department of Management, Aarhus University, Aarhus C, Denmark
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Waters M, Inkman M, Kang L, Denardo D, Henke L, Badiyan S, Smith R, Glasgow S, Grierson P, Pedersen K, Zhang J, Kim H. Convolutional Neural Network Classification of Pretreatment Biopsies of Rectal Adenocarcinoma Predicts Complete Clinical Response to Short-Course Radiation and Consolidation Chemotherapy. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.07.1010] [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: 10/31/2022]
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Hurri E, Ohlson A, Lundberg Å, Aspán A, Pedersen K, Tråvén M. Herd-level prevalence of Mycoplasma bovis in Swedish dairy herds determined by antibody ELISA and PCR on bulk tank milk and herd characteristics associated with seropositivity. J Dairy Sci 2022; 105:7764-7772. [PMID: 35879164 DOI: 10.3168/jds.2021-21390] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 04/27/2022] [Indexed: 11/19/2022]
Abstract
Mycoplasma bovis is an important pathogen causing pneumonia, mastitis, and arthritis in cattle, leading to reduced animal welfare and economic losses worldwide. In this cross-sectional study, we investigated the prevalence of M. bovis in bulk tank milk (BTM) and herd characteristics associated with a positive antibody test result in Swedish dairy herds. Bulk tank milk samples from all Swedish dairy herds (n = 3,144) were collected and analyzed with ID Screen antibody ELISA and PCR. Information on herd characteristics was collected from the national Dairy Herd Improvement database. To identify herd characteristics associated with the presence of antibodies in BTM, logistic regression was used in 4 different models. The apparent herd-level prevalence of M. bovis infection based on antibodies in BTM was 4.8%, with large regional differences ranging from 0 to 20%. None of the BTM samples was positive by PCR. All the antibody-positive herds were situated in the south of Sweden. The logistic regression model showed that larger herds had higher odds of detectable antibodies in BTM (herd size >120 cows, odds ratio = 8.8). An association was also found between antibodies in BTM and both a higher late calf mortality (2-6 mo) and a higher young stock mortality (6-15 mo). This study showed a clear regional difference in the apparent prevalence of M. bovis infection based on antibodies. The relatively low prevalence of M. bovis in Sweden is a strong motivator for the cattle industry to take steps to prevent further spread of the infection. It is essential that the M. bovis status of free herds be known, and the regional differences shown in this study suggest that testing is highly recommended when live cattle from high-prevalence areas are being introduced into herds. We do not recommend using PCR on BTM to detect infected herds, owing to the low detection frequency in this study.
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Affiliation(s)
- E Hurri
- Department of Clinical Sciences, Swedish University of Agricultural Sciences, SE-750 07 Uppsala, Sweden; Department of Animal Health and Antimicrobial Strategies, National Veterinary Institute (SVA), SE-751 89 Uppsala, Sweden.
| | - A Ohlson
- Section of Animal Health, Växa Sverige, SE-101 24 Stockholm, Sweden
| | - Å Lundberg
- Section of Animal Health, Växa Sverige, SE-101 24 Stockholm, Sweden
| | - A Aspán
- Department of Animal Health and Antimicrobial Strategies, National Veterinary Institute (SVA), SE-751 89 Uppsala, Sweden
| | - K Pedersen
- Department of Animal Health and Antimicrobial Strategies, National Veterinary Institute (SVA), SE-751 89 Uppsala, Sweden
| | - M Tråvén
- Department of Clinical Sciences, Swedish University of Agricultural Sciences, SE-750 07 Uppsala, Sweden
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Hassanzadeh C, Fallahian F, Low G, Roy A, Chin R, Pedersen K, Mutch M, Glasgow S, Henke L, Badiyan S, Kim H. PO-1249 Lateral Pelvic Nodal Boost During Short Course Radiation Therapy for Locally Advanced Rectal Cancer. Radiother Oncol 2021. [DOI: 10.1016/s0167-8140(21)07700-8] [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: 11/25/2022]
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Raghav K, Yoshino T, Taniguchi H, Tejpar S, Vogel A, Wainberg Z, Yamaguchi K, Fakih M, Pedersen K, Bando K, Kawakami H, Beck J, Kanai M, Liu Y, Mekan S, Pudussery G, Qiu Y, Kopetz S. P-45 An open-label, phase 2 study of patritumab deruxtecan in patients with previously treated advanced/metastatic colorectal cancer. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.05.100] [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: 11/29/2022] Open
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Cyr PR, Pedersen K, Iyer AL, Bundorf MK, Goldhaber-Fiebert JD, Gyrd-Hansen D, Kristiansen IS, Burger EA. Providing more balanced information on the harms and benefits of cervical cancer screening: A randomized survey among US and Norwegian women. Prev Med Rep 2021; 23:101452. [PMID: 34221852 PMCID: PMC8242055 DOI: 10.1016/j.pmedr.2021.101452] [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] [Received: 06/07/2021] [Accepted: 06/09/2021] [Indexed: 11/26/2022] Open
Abstract
Additional information did not impact intentions to participate in CC screening. Additional information increased uncertainty to seek precancer treatment in Norway. Women reported strong system-specific preferences for sources of information. Having a prior Pap-test was an important predictor of intentions-to-participate. Socioeconomic factors influenced follow-up intentions in the U.S. but not in Norway.
We aimed to identify how additional information about benefits and harms of cervical cancer (CC) screening impacted intention to participate in screening, what type of information on harms women preferred receiving, from whom, and whether it differed between two national healthcare settings. We conducted a survey that randomized screen-eligible women in the United States (n = 1084) and Norway (n = 1060) into four groups according to the timing of introducing additional information. We found that additional information did not significantly impact stated intentions-to-participate in screening or follow-up testing in either country; however, the proportion of Norwegian women stating uncertainty about seeking precancer treatment increased from 7.9% to 14.3% (p = 0.012). Women reported strong system-specific preferences for sources of information: Norwegians (59%) preferred it come from a national public health agency while Americans (59%) preferred it come from a specialist care provider. Regression models revealed having a prior Pap-test was the most important predictor of intentions-to-participate in both countries, while having lower income reduced the probabilities of intentions-to-follow-up and seek precancer treatment among U.S. women. These results suggest that additional information on harms is unlikely to reduce participation in CC screening but could increase decision uncertainty to seek treatment. Providing unbiased information would improve on the ethical principle of respect for autonomy and self-determination. However, the clinical impact of additional information on women’s understanding of the trade-offs involved with CC screening should be investigated. Future studies should also consider country-specific socioeconomic barriers to screening if communication re-design initiatives aim to improve CC screening participation.
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Affiliation(s)
- P R Cyr
- Department of Global Health and Community Medicine, Institute of Health and Society, University of Oslo, P.O. Box 1039 Blindern, 0318 Oslo, Norway
| | - K Pedersen
- Department of Health Management and Health Economics, Institute of Health and Society, University of Oslo, P.O. Box 1039 Blindern, 0318 Oslo, Norway
| | - A L Iyer
- Department of Health Management and Health Economics, Institute of Health and Society, University of Oslo, P.O. Box 1039 Blindern, 0318 Oslo, Norway
| | - M K Bundorf
- Stanford School of Public Policy, Duke University, Durham, NC 27708 and NBER, United States
| | - J D Goldhaber-Fiebert
- Centers for Health Policy and Primary Care and Outcomes Research, Stanford Health Policy, Stanford University, Stanford, CA, United States
| | - D Gyrd-Hansen
- Danish Centre for Health Economic, Department of Public Health, University of Southern Denmark, J.B. Winsløws Vej 9B, 1 Floor, 5000, Odense C, Denmark
| | - I S Kristiansen
- Department of Health Management and Health Economics, Institute of Health and Society, University of Oslo, P.O. Box 1039 Blindern, 0318 Oslo, Norway
| | - E A Burger
- Department of Health Management and Health Economics, Institute of Health and Society, University of Oslo, P.O. Box 1039 Blindern, 0318 Oslo, Norway
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Chin R, Roy A, Pedersen K, Hunt S, Mutch M, Glasgow S, Silviera M, Wise P, Smith R, Wang-Gillam A, Tan B, Lim K, Suresh R, Amin M, Roach M, Badiyan S, Henke L, Kim H. Complete Clinical Response after Short-course Radiation and Sequential Multi-agent Chemotherapy for Non-operative Treatment of Rectal Adenocarcinoma. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.2163] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Kristensen CS, Christiansen MG, Pedersen K, Larsen LE. Production losses five months after outbreak with a recombinant of two PRRSV vaccine strains in 13 Danish sow herds. Porcine Health Manag 2020; 6:26. [PMID: 33042567 PMCID: PMC7537099 DOI: 10.1186/s40813-020-00165-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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: 06/05/2020] [Accepted: 08/07/2020] [Indexed: 11/10/2022] Open
Abstract
Background In July 2019, a PRRSV-negative boar station was infected with a recombinant of two PRRSV vaccine strains, which subsequently spread to at least 36 herds that had received semen from the boar station. In the following months, all the infected herds reported reduced productivity. The aim of the present study was to evaluate the impact of the PRRS outbreak. Results Production data were collected from 13 of the herds. The average levels of farrowings/week, liveborns/litter, stillborns/litter, pre-weaning mortality and weaned pigs/litter were compared for the five-month period after infection and the preceding 7 months before infection with the new variant of PRRSV-1. Twelve herds experienced a decrease in farrowings/week (0.1-10.8% fewer farrowings/week), and all herds experienced fewer liveborns (0.8-4.8 fewer liveborns/litter) and more stillborns (0.6-2.6 more stillborns/litter). Pre-weaning mortality nearly doubled in half of the herds. Overall, the 13 herds were missing 2.4-6.5 pigs/litter at weaning during the 5 months after infection compared to the seven preceding months before infection. Conclusion In this study, the impact of this new PRRSV-1 variant on productivity exceeded that typically seen in Danish herds infected with PRRSV-1.
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Affiliation(s)
| | | | - K Pedersen
- SEGES Danish Pig Research Centre, Copenhagen, Denmark
| | - L E Larsen
- Department of Veterinary and Animal Sciences, University of Copenhagen, Frederiksberg, Denmark
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Park H, Sanjeevaiah A, Suresh R, Mehta R, Trikalinos N, Bagegni N, Aranha O, Pedersen K, Nixon A, Jin R, Mills J, Fields R, Amin M, Lim K, Tan B, Grierson P, Jiang S, Rosario MD, Wang-Gillam A, Lockhart A. P-131 Ramucirumab and irinotecan in patients with previously treated gastroesophageal adenocarcinoma: Interim analysis of a phase II trial. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.04.213] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Holmer I, Salomonsen CM, Jorsal SE, Astrup LB, Jensen VF, Høg BB, Pedersen K. Antibiotic resistance in porcine pathogenic bacteria and relation to antibiotic usage. BMC Vet Res 2019; 15:449. [PMID: 31829171 PMCID: PMC6907208 DOI: 10.1186/s12917-019-2162-8] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [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: 03/13/2019] [Accepted: 10/29/2019] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Optimal treatment and prudent use of antimicrobials for pigs is imperative to secure animal health and prevent development of critical resistance. An important step in this one-health context is to monitor resistance patterns of important animal pathogens. The aim of this study was to investigate the antimicrobial resistance patterns of five major pathogens in Danish pigs during a period from 2004 to 2017 and elucidate any developments or associations between resistance and usage of antibiotics. RESULTS The minimum inhibitory concentration (MIC) for Escherichia coli, Actinobacillus pleuropneumoniae, Streptococcus suis, Bordetella bronchiseptica, and Staphylococcus hyicus was determined to representatives of antibiotic classes relevant for treatment or surveillance. Escherichia coli isolates were mostly sensitive to fluoroquinolones and colistin, whereas high levels of resistance were observed to ampicillin, spectinomycin, streptomycin, sulfonamides and tetracycline. While resistance levels to most compounds remained relatively stable during the period, resistance to florfenicol increased from 2.1% in 2004 to 18.1% in 2017, likely in response to a concurrent increase in usage. A temporal association between resistance and usage was also observed for neomycin. E. coli serovars O138 and O149 were generally more resistant than O139. For A. pleuropneumoniae, the resistance pattern was homogenous and predictable throughout the study period, displaying high MIC values only to erythromycin whereas almost all isolates were susceptible to all other compounds. Most S. suis isolates were sensitive to penicillin whereas high resistance levels to erythromycin and tetracycline were recorded, and resistance to erythromycin and trimethoprim increasing over time. For S. hyicus, sensitivity to the majority of the antimicrobials tested was observed. However, penicillin resistance was recorded in 69.4-88.9% of the isolates. All B. bronchiseptica isolates were resistant to ampicillin, whereas all but two isolates were sensitive to florfenicol. The data obtained have served as background for a recent formulation of evidence-based treatment guidelines for pigs. CONCLUSIONS Antibiotic resistance varied for some pathogens over time and in response to usage. Resistance to critically important compounds was low. The results emphasize the need for continuous surveillance of resistance patterns also in pig pathogenic bacteria.
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Affiliation(s)
- I Holmer
- Technical University of Denmark, Kemitorvet Building 202, Anker Engelunds Vej 1, DK-2800, Kgs. Lyngby, Denmark
| | | | - S E Jorsal
- Technical University of Denmark, Kemitorvet Building 202, Anker Engelunds Vej 1, DK-2800, Kgs. Lyngby, Denmark
| | - L B Astrup
- Technical University of Denmark, Kemitorvet Building 202, Anker Engelunds Vej 1, DK-2800, Kgs. Lyngby, Denmark
| | - V F Jensen
- Technical University of Denmark, Kemitorvet Building 202, Anker Engelunds Vej 1, DK-2800, Kgs. Lyngby, Denmark
| | - B Borck Høg
- Technical University of Denmark, Kemitorvet Building 202, Anker Engelunds Vej 1, DK-2800, Kgs. Lyngby, Denmark
| | - K Pedersen
- National Veterinary Institute, Ulls väg 2B, 751 89, Uppsala, Sweden.
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Srivastava A, Gabani P, Kim E, Lee H, Pedersen K, Kim H. Radiation and Medical Oncology Trainee Perceptions of the Prior Authorization Process: A National Survey. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.1419] [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: 10/26/2022]
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Pedersen K, Foster N, Overman M, Boland P, Kim S, Arrambide K, Jaszewski B, Welch J, Wilson R, McWilliams R. ZEBRA: an ACCRU/IRCI multicenter phase 2 study of pembrolizumab in patients with advanced small bowel adenocarcinoma (SBA). Ann Oncol 2019. [DOI: 10.1093/annonc/mdz154.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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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Mahmmod YS, Svennesen L, Katholm J, Pedersen K, Klaas IC. Bayesian estimation of qPCR and bacterial culture accuracy for detection of bovine coagulase-negative staphylococci from milk and teat apex at different test cut-off points. J Appl Microbiol 2019; 127:406-417. [PMID: 31077513 DOI: 10.1111/jam.14309] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 02/01/2019] [Revised: 04/20/2019] [Accepted: 05/06/2019] [Indexed: 12/01/2022]
Abstract
AIM To primarily estimate the sensitivity (Se) and specificity (Sp) of the commercially available Mastit4 quantitative PCR (qPCR) assay and bacterial culture (BC) for diagnosis of intramammary infections (IMI) and teat apex colonization (TAC) with coagulase-negative staphylococci (CNS) at different cut-offs for qPCR cycle threshold values using Bayesian latent class analysis. A secondary objective was to evaluate two cut-offs of BC for diagnosis of IMI and TAC with CNS. METHODS AND RESULTS We randomly selected 13-20 cows with subclinical mastitis from eight dairy herds. Teat skin samples and aseptically collected foremilk samples were collected from the right hindquarters (n = 149) for BC and qPCR analysis. The Se of qPCR was always higher than BCSe in diagnosis of IMI, however; the Sp of BC was higher than qPCRSp . BCSe and BCSp showed no substantial difference between the tested BC cut-offs. In contrast to IMI, estimates of BC and qPCR in diagnosing TAC were different. BCSe was higher than qPCRSe at all tested cut-offs, however; qPCRSp was higher than BCSp . CONCLUSION The overall performance of qPCR is higher than BC in the diagnosis of IMI; however, the performance of BC is better than qPCR in diagnosis of TAC. The qPCR and BC are valid diagnostics for bovine IMI with CNS. However, for TAC, both techniques require further investigation to reduce the uncertainty of the true status of the quarter and teat skin. SIGNIFICANCE AND IMPACT OF THE STUDY We reported, for the first time, the diagnostic performance of new mastitis technology (Mastit4 PCR) and culture for detection of CNS in milk and nonmilk samples in dairy herds with automatic milking systems. Our findings will improve the interpretation of the test results of culture and qPCR assay and subsequently, will strengthen the control of IMI with CNS in dairy cows.
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Affiliation(s)
- Y S Mahmmod
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C, Denmark.,Infectious Diseases, Department of Animal Medicine, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Sharkia Province, Egypt
| | - L Svennesen
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | - J Katholm
- DNA Diagnostic A/S, Risskov, Denmark
| | - K Pedersen
- National Veterinary Institute, Technical University of Denmark, Kongens Lyngby, Denmark
| | - I C Klaas
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C, Denmark
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Ulriksen HU, Søndergaard T, Pedersen TG, Pedersen K. Plasmon enhanced light scattering into semiconductors by aperiodic metal nanowire arrays. Opt Express 2019; 27:14308-14320. [PMID: 31163881 DOI: 10.1364/oe.27.014308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 04/11/2019] [Indexed: 06/09/2023]
Abstract
Light scattering from nanostructures is an essential ingredient in several optical technologies, and experimental verification of simulations of light scattering is important. In particular, solar cells may benefit from light-trapping due to scattering. However, light that is successfully trapped in an absorbing media such as e.g. Si necessarily escapes direct detection. We present in this paper a technique for direct measurement and analysis of light scattering from nanostructures on a surface, exemplified with aperiodic patterns of Ag strips placed on a GaAs substrate. By placing the structures on the flat face of a half-cylinder, the angular distribution of light scattered into the azimuth plane can be directly detected, including directions above the critical angle that would be captured if the substrate had the form of a slab. Modelling of the scattered light by summing up contributions from each strip agrees with the experimental results to a very detailed level, both for scattering backward and into the substrate.
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Chapman W, Roxburgh C, Makhdoom B, Roy A, Youssef F, Brady P, Olsen J, Kim H, Pedersen K, Mutch M, Hunt S, Markovina S, Hajj C, Cercek A, Weiser M, Parikh P. Rectal Cancer Downstaging is Significantly Improved with Different Regimens of Total Neoadjuvant Therapy. Int J Radiat Oncol Biol Phys 2018. [DOI: 10.1016/j.ijrobp.2018.06.181] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Bekaii-Saab T, Ou F, Anderson D, Ahn D, Boland P, Ciombor K, Jacobs N, Desnoyers R, Cleary J, Meyers J, Chiorean E, Pedersen K, Barzi A, Sloan J, McCune J, Lacouture M, Lenz H, Grothey A. Regorafenib Dose Optimization Study (ReDOS): Randomized phase II trial to evaluate escalating dosing strategy and pre-emptive topical steroids for regorafenib in refractory metastatic colorectal cancer (mCRC) – An ACCRU Network study. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy149.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Abstract
Purpose
The purpose of this paper is to increase our understanding of the requirements for public sector organizations to implement benefits realization practices. The research compares benefits realization practices as suggested by the literature with actual practice with the goal of identifying both insufficiencies in the current literature and challenges in practice that must be overcome to improve the current situation.
Design/methodology/approach
The case study approach is used to study benefits realization across national and local government organizations.
Findings
Five major challenges that are not dealt with by existing literature were identified: benefits realization requires not just organizational capabilities, but also inter-organizational capabilities; coordination of benefits realization across organizational units, local and central government and across internal organizational levels is both essential and very challenging; managing benefits realization includes much more than integrating benefits realization practices in IT projects; different benefits realization practices are needed at central government level, local management level and case worker level; and different uses of technology require different levels of benefits realization capabilities and different practices. The case also illustrates that under certain conditions, organization can actually realize significant improvements with limited benefits realization capabilities: When IT is used not to change but to fully automate processes, the reliance on formal benefits realization practices is decreased.
Research limitations/implications
The findings are based on a single case.
Originality/value
There is only little empirical research studying benefits realization in a public sector context. Furthermore, the research studies benefits realization from an organizational process perspective, and not from the perspective of IT projects.
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Pedersen K, Bauer NE, Olsen S, Arenas-Gamboa AM, Henry AC, Sibley TD, Gidlewski T. Identification of Brucella spp. in feral swine (Sus scrofa) at abattoirs in Texas, USA. Zoonoses Public Health 2017; 64:647-654. [PMID: 28391650 DOI: 10.1111/zph.12359] [Citation(s) in RCA: 15] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Indexed: 12/01/2022]
Abstract
Various tissues, nasal swabs, urine and blood samples were collected from 376 feral swine at two federally inspected abattoirs in Texas during six separate sampling periods in 2015. Samples were tested for Brucella spp. by culture and serology. Brucella spp. were cultured from 13.0% of feral swine, and antibodies were detected in 9.8%. Only 32.7% of culture-positive feral swine were also antibody positive, and 43.2% of antibody-positive feral swine were culture positive. Approximately, the same number of males (14.0%) and females (12.1%) were culture positive, and slightly more males (10.5%) than females (8.7%) were antibody positive. Our results indicate that serology likely underestimates the prevalence of feral swine infected, and that those who come in contact with feral swine should be aware of the symptoms of infection with Brucella spp. to ensure prompt treatment.
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Affiliation(s)
- K Pedersen
- U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, Fort Collins, CO, USA
| | - N E Bauer
- U.S. Department of Agriculture, Food Safety Inspection Service, College Station, TX, USA
| | - S Olsen
- U.S. Department of Agriculture, Agricultural Research Service, Ames, IA, USA
| | - A M Arenas-Gamboa
- Department of Veterinary Pathobiology, College of Veterinary Medicine & Biomedical Sciences, Texas A&M University, College Station, TX, USA
| | - A C Henry
- U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, Fort Worth, TX, USA
| | - T D Sibley
- U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, Fort Worth, TX, USA
| | - T Gidlewski
- U.S. Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, Fort Collins, CO, USA
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Mignaqui A, Marcellino R, Ronco T, Pappalardo J, Nonnemann B, Pedersen K, Robles C. Isolation and molecular characterization of Clostridium perfringens from healthy Merino lambs in Patagonia region, Argentina. Anaerobe 2017; 43:35-38. [DOI: 10.1016/j.anaerobe.2016.10.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 10/18/2016] [Accepted: 10/30/2016] [Indexed: 10/20/2022]
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Kjeldsen MK, Torpdahl M, Pedersen K, Nielsen EM. Development and comparison of a generic multiple-locus variable-number tandem repeat analysis with pulsed-field gel electrophoresis for typing of Salmonella enterica subsp. enterica. J Appl Microbiol 2016; 119:1707-17. [PMID: 26440858 DOI: 10.1111/jam.12965] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [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: 08/10/2015] [Revised: 09/10/2015] [Accepted: 09/17/2015] [Indexed: 11/28/2022]
Abstract
AIMS Salmonella enterica subsp. enterica causes salmonellosis in humans and animals. Serovar-specific multiple-locus variable-number tandem repeat analysis (MLVA) is widely used for Salmonella surveillance; however, isolates have to be serotyped prior to MLVA typing and only the most common serovars can be typed. We developed a MLVA scheme for high-discriminatory typing of Salmonella. METHODS AND RESULTS Sixty-six unique VNTRs were investigated and the polymorphisms of seven promising VNTRs were evaluated with a panel 163 diverse isolates of 14 serotypes of significance for human health. Five VNTRs were selected for MLVA analysis. The discriminatory power was evaluated within serovars by 163 isolates and MLVA yielded 79 genotypes (DI of 0·9790) and pulsed-field gel electrophoresis (PFGE) revealed 87 genotypes (DI of 0·9989). MLVA divided each serotype into 2-8 different profiles and identified six pairs of outbreak-related strains. CONCLUSIONS The technique showed a high-discriminatory power within most serotypes comparable with or better than that of PFGE. SIGNIFICANCE AND IMPACT OF THE STUDY This MLVA assay makes it possible to use a single typing method for Salmonella surveillance and outbreak investigations. This allows inexpensive and fast surveillance for laboratories without resources for both serotyping and molecular typing, e.g. PFGE or sequence-based methods, and thereby improve the effectiveness of epidemiological investigations of Salmonella infections globally.
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Affiliation(s)
- M K Kjeldsen
- The Unit for Foodborne Infections, Department of Microbiology and Infection Control, Statens Serum Institut, Copenhagen, Denmark.,National Food Institute, Technical University of Denmark, Søborg, Denmark
| | - M Torpdahl
- The Unit for Foodborne Infections, Department of Microbiology and Infection Control, Statens Serum Institut, Copenhagen, Denmark
| | - K Pedersen
- National Veterinary Institute, Technical University of Denmark, Frederiksberg, Denmark
| | - E M Nielsen
- The Unit for Foodborne Infections, Department of Microbiology and Infection Control, Statens Serum Institut, Copenhagen, Denmark
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Enlund A, Pedersen K, Boeryd B, Varenhorst E. Transrectal Ultrasonography Compared to Histopathological Assessment for Local Staging of Prostatic Carcinoma. Acta Radiol 2016. [DOI: 10.1177/028418519003100613] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Transrectal ultrasonography (US) was used to predict tumor stage prior to radical prostatectomy in 59 patients with clinically localized carcinoma of the prostate. In 35 cases, US-guided biopsy was done. Histopathological examination of whole tissue mounts was compared with US findings in 49 cases. The remaining 10 had US-guided biopsies proving extracapsular extension of the tumor. Tumor size, as measured by US, was inadequate to distinguish between organ-confined disease and locally advanced tumor. Strategically taken US-guided biopsies of the periprostatic tissue or seminal vesicles were necessary. In the first 30 (group I) in this series of 59 cases, 18 of 22 tumors with extraprostatic spread (pT3) were understaged. In the last 29 cases (group II) only 6 of 19 pT3 tumors were understaged. After an initial training period, transrectal US, in combination with US-guided biopsy, can prove valuable for the pretherapeutic assessment of local spread of prostatic cancer, and can thus aid in the choice of appropriate treatment.
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Pedersen K, Sørbye SW, Kristiansen IS, Burger EA. Using novel biomarkers to triage young adult women with minor cervical lesions: a cost-effectiveness analysis. BJOG 2016; 124:474-484. [PMID: 27264207 DOI: 10.1111/1471-0528.14135] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/23/2016] [Indexed: 12/20/2022]
Abstract
OBJECTIVE To evaluate the short-term consequences and cost-effectiveness associated with the use of novel biomarkers to triage young adult women with minor cervical cytological lesions. DESIGN Model-based economic evaluation using primary epidemiological data from Norway, supplemented with data from European and American clinical trials. SETTING Organised cervical cancer screening in Norway. POPULATION Women aged 25-33 years with minor cervical cytological lesions detected at their primary screening test. METHODS We expanded an existing simulation model to compare 12 triage strategies involving alternative biomarkers (i.e. reflex human papillomavirus (HPV) DNA/mRNA testing, genotyping, and dual staining) with the current Norwegian triage guidelines. MAIN OUTCOME MEASURES The number of high-grade precancers detected and resource use (e.g. monetary costs and colposcopy referrals) for a single screening round (3 years) for each triage strategy. Cost-efficiency, defined as the additional cost per additional precancer detected of each strategy compared with the next most costly strategy. RESULTS Five strategies were identified as cost-efficient, and are projected to increase the precancer detection rate between 18 and 57%, compared with current guidelines; however, the strategies did not uniformly require additional resources. Strategies involving HPV mRNA testing required fewer resources, whereas HPV DNA-based strategies detected >50% more precancers, but were more costly and required twice as many colposcopy referrals compared with the current guidelines. CONCLUSION Strategies involving biomarkers to triage younger women with minor cervical cytological lesions have the potential to detect additional precancers, yet the optimal strategy depends on the resources available as well as decision-makers' and women's acceptance of additional screening procedures. TWEETABLE ABSTRACT Women with minor cervical lesions may be triaged more accurately and effectively using novel biomarkers.
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Affiliation(s)
- K Pedersen
- Department of Health Management and Health Economics, Institute of Health and Society, University of Oslo, Oslo, Norway
| | - S W Sørbye
- Department of Clinical Pathology, University Hospital of North Norway, Tromsø, Norway
| | - I S Kristiansen
- Department of Health Management and Health Economics, Institute of Health and Society, University of Oslo, Oslo, Norway
| | - E A Burger
- Department of Health Management and Health Economics, Institute of Health and Society, University of Oslo, Oslo, Norway.,Center for Health Decision Science, Harvard T.H. Chan School of Public Health, Boston, MA, USA
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Pedersen K, Irwin J, Sansourekidou P, Kriminski S, Pavord D. SU-F-T-509: Investigation into the Impact of the Linear Accelerator Treatment Table On Skin Dose to Prone Breast Patients. Med Phys 2016. [DOI: 10.1118/1.4956694] [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: 11/07/2022] Open
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Van Immerseel F, Lyhs U, Pedersen K, Prescott JF. Recent breakthroughs have unveiled the many knowledge gaps inClostridium perfringens-associated necrotic enteritis in chickens: the first International Conference on Necrotic Enteritis in Poultry. Avian Pathol 2016; 45:269-70. [DOI: 10.1080/03079457.2016.1166857] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Pedersen K, Majithia N, Eickoff R, Looker S, Thanarajasingam G, Grothey A. PD-008 Safety and efficacy of desensitization protocols for platinum hypersensitivity reactions. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv234.07] [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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Wik DR, Hornstrup A, Molendi S, Madejski G, Harrison FA, Zoglauer A, Grefenstette BW, Gastaldello F, Madsen KK, Westergaard NJ, Ferreira DDM, Kitaguchi T, Pedersen K, Boggs SE, Christensen FE, Craig WW, Hailey CJ, Stern D, Zhang WW. NuSTAROBSERVATIONS OF THE BULLET CLUSTER: CONSTRAINTS ON INVERSE COMPTON EMISSION. ACTA ACUST UNITED AC 2014. [DOI: 10.1088/0004-637x/792/1/48] [Citation(s) in RCA: 127] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Hill DE, Dubey JP, Baroch JA, Swafford SR, Fournet VF, Hawkins-Cooper D, Pyburn DG, Schmit BS, Gamble HR, Pedersen K, Ferreira LR, Verma SK, Ying Y, Kwok OCH, Feidas H, Theodoropoulos G. Surveillance of feral swine for Trichinella spp. and Toxoplasma gondii in the USA and host-related factors associated with infection. Vet Parasitol 2014; 205:653-65. [PMID: 25182211 DOI: 10.1016/j.vetpar.2014.07.026] [Citation(s) in RCA: 35] [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: 05/01/2014] [Revised: 07/23/2014] [Accepted: 07/25/2014] [Indexed: 11/26/2022]
Abstract
Trichinella spp. and Toxoplasma gondii are important zoonotic parasites that infect warm blooded animals and humans worldwide. Among domesticated food animals, pigs are the main host for Trichinella spiralis. Pigs, chickens, sheep, and goats are known to be infected with T. gondii at varying rates, depending on husbandry. Infections in wildlife with these parasites are generally higher than in domesticated species. Feral swine act as reservoirs of infection in the sylvatic ecosystem for Trichinella spp. and T. gondii, acting as sources of infection for peridomestic carnivores whose home ranges overlap with domestic pigs. Feral swine can have direct contact with non-biosecure domestic pigs, presenting opportunity for direct disease transmission through cannibalistic behavior. Determination of the prevalence of Trichinella spp. and T. gondii infection in feral swine is needed to understand the risk of transmission of these parasites to domestic pigs. A cross-sectional serological survey was conducted between 2006 and 2010 to estimate the antibody prevalence of Trichinella spp. and T. gondii and risk factors associated with infection in feral swine in the USA. Serum samples were tested from 3247 feral pigs from 32 states; results are reported from 26 states. Maximum entropy ecological niche modeling and spatial scan statistic were utilized to predict the geographic range and to examine clusters of infection of Trichinella spp. and T. gondii in feral pigs. The seroprevalence of antibodies to Trichinella spp. and T. gondii was 3.0% and 17.7%, respectively. Species distribution modeling indicated that the most probable distribution areas for both parasites was similar, concentrated primarily in the South and the Midwest regions of the USA. A follow up survey conducted during 2012-2013 revealed that 2.9% of 984 sampled feral swine were seropositive for Trichinella spp., and 28.4% were seropositive for T. gondii. Three hundred and thirty (330) tongues were collected from the 984 sampled animals during 2012-2013; 1.81% were tissue positive for T. spiralis muscle larvae; no other genotypes were found. The potential exists for introduction of these pathogens into domestic herds of non-biosecure domestic pigs as a result of increasing overlap of the range of feral pigs with non-biosecure domestic pigs production facilities in the USA.
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Affiliation(s)
- D E Hill
- United States Department of Agriculture, Agricultural Research Service, Beltsville Agricultural Research Center, Animal Parasitic Diseases Laboratory, Beltsville, MD, 20705-2350, USA.
| | - J P Dubey
- United States Department of Agriculture, Agricultural Research Service, Beltsville Agricultural Research Center, Animal Parasitic Diseases Laboratory, Beltsville, MD, 20705-2350, USA
| | - J A Baroch
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, 4101 LaPorte Ave, Fort Collins, CO 80521, USA
| | - S R Swafford
- United States Fish and Wildlife Service, 595 Yazoo Refuge Road, MS 38748-9729, USA
| | - V F Fournet
- United States Department of Agriculture, Agricultural Research Service, Beltsville Agricultural Research Center, Animal Parasitic Diseases Laboratory, Beltsville, MD, 20705-2350, USA
| | - D Hawkins-Cooper
- United States Department of Agriculture, Agricultural Research Service, Beltsville Agricultural Research Center, Animal Parasitic Diseases Laboratory, Beltsville, MD, 20705-2350, USA
| | - D G Pyburn
- National Pork Board, 1776 NW 114th St., Clive, IA 50325, USA
| | - B S Schmit
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, 4101 LaPorte Ave, Fort Collins, CO 80521, USA
| | - H R Gamble
- National Academy of Sciences, 500 5th Street N.W., Washington, D.C., 20001, USA
| | - K Pedersen
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, 4101 LaPorte Ave, Fort Collins, CO 80521, USA
| | - L R Ferreira
- United States Department of Agriculture, Agricultural Research Service, Beltsville Agricultural Research Center, Animal Parasitic Diseases Laboratory, Beltsville, MD, 20705-2350, USA
| | - S K Verma
- United States Department of Agriculture, Agricultural Research Service, Beltsville Agricultural Research Center, Animal Parasitic Diseases Laboratory, Beltsville, MD, 20705-2350, USA
| | - Y Ying
- United States Department of Agriculture, Agricultural Research Service, Beltsville Agricultural Research Center, Animal Parasitic Diseases Laboratory, Beltsville, MD, 20705-2350, USA
| | - O C H Kwok
- United States Department of Agriculture, Agricultural Research Service, Beltsville Agricultural Research Center, Animal Parasitic Diseases Laboratory, Beltsville, MD, 20705-2350, USA
| | - H Feidas
- Department of Meteorology and Climatology, School of Geology, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - G Theodoropoulos
- Department of Anatomy and Physiology of Farm Animals, Agricultural University of Athens, 75 Iera Odos, Votanikos, Athens 11855, Greece
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Cibin V, Mancin M, Pedersen K, Barrucci F, Belluco S, Roccato A, Cocola F, Ferrarini S, Sandri A, Lau Baggesen D, Ricci A. Usefulness of Escherichia coli and Enterobacteriaceae as Process Hygiene Criteria in poultry: experimental study. ACTA ACUST UNITED AC 2014. [DOI: 10.2903/sp.efsa.2014.en-635] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- V Cibin
- Istituto Zooprofilattico Sperimentale (IZS) delle Venezie Italy
| | - M Mancin
- Istituto Zooprofilattico Sperimentale (IZS) delle Venezie Italy
| | - K Pedersen
- Technical University of Denmark, National Food Institute Denmark
| | - F Barrucci
- Istituto Zooprofilattico Sperimentale (IZS) delle Venezie Italy
| | - S Belluco
- Istituto Zooprofilattico Sperimentale (IZS) delle Venezie Italy
| | - A Roccato
- Istituto Zooprofilattico Sperimentale (IZS) delle Venezie Italy
| | - F Cocola
- Istituto Zooprofilattico Sperimentale (IZS) delle Venezie Italy
| | - S Ferrarini
- Azienda Unità Locale Socio‐Sanitaria 6 (Az‐ULSS 6) Italy
| | - A Sandri
- Istituto Zooprofilattico Sperimentale (IZS) delle Venezie Italy
| | - D Lau Baggesen
- Technical University of Denmark, National Food Institute Denmark
| | - A Ricci
- Istituto Zooprofilattico Sperimentale (IZS) delle Venezie Italy
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Morancho B, Parra-Palau J, Peg V, Vicario R, Zacarias-Fluck M, Pedersen K, Perou C, Prat A, Rubio I, Arribas J. 306: Chemotherapy sensitizes p95HER2-positive breast cancers to trastuzumab. Eur J Cancer 2014. [DOI: 10.1016/s0959-8049(14)50272-9] [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: 10/25/2022]
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Jakočiūnė D, Bisgaard M, Pedersen K, Olsen JE. Demonstration of persistent contamination of a cooked egg product production facility with Salmonella enterica serovar Tennessee and characterization of the persistent strain. J Appl Microbiol 2014; 117:547-53. [PMID: 24797223 DOI: 10.1111/jam.12536] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [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: 01/14/2014] [Revised: 03/24/2014] [Accepted: 04/23/2014] [Indexed: 11/29/2022]
Abstract
AIMS The aim of this study was to investigate whether continuous contamination of light pasteurized egg products with Salmonella enterica serovar Tennessee (S. Tennessee) at a large European producer of industrial egg products was caused by persistent contamination of the production facility and to characterize the persistent strains. METHODS AND RESULTS Seventy-three S. Tennessee isolates collected from products over a 3-year period with intermittent contamination, and 15 control strains were compared by pulsed field gel electrophoresis (PFGE) using two enzymes. Forty-five case isolates distributed throughout the full period were shown to belong to one profile type. Isolates representing different PFGE profiles were all assigned to ST 319 by multilocus sequence typing (MLST). The case isolates did not show a higher ability to form biofilm on a plastic surface than noncase isolates. Characteristically, members of the persistent clone were weak producers of H2 S in laboratory medium. S. Tennessee isolated from the case was able to grow better in pasteurized egg product compared with other serovars investigated. CONCLUSIONS It was concluded that the contamination was caused by a persistent strain in the production facility and that this strain apparently had adapted to grow in the relevant egg product. SIGNIFICANCE AND IMPACT OF THE STUDY S. Tennessee has previously been associated with persistence in hatching facilities. This is the first report of persistent contamination of an egg production facility with this serovar.
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Affiliation(s)
- D Jakočiūnė
- Department of Veterinary Disease Biology, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C, Denmark
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Kjeldsen M, Torpdahl M, Campos J, Pedersen K, Nielsen E. Multiple-locus variable-number tandem repeat analysis of Salmonella enterica
subsp. enterica
serovar Dublin. J Appl Microbiol 2014; 116:1044-54. [DOI: 10.1111/jam.12441] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Revised: 12/21/2013] [Accepted: 01/02/2014] [Indexed: 11/29/2022]
Affiliation(s)
- M.K. Kjeldsen
- Department of Microbiology and Infection Control; Foodborne Pathogens; Statens Serum Institut; Copenhagen Denmark
- National Food Institute; Technical University of Denmark; Mørkhøj Denmark
| | - M. Torpdahl
- Department of Microbiology and Infection Control; Foodborne Pathogens; Statens Serum Institut; Copenhagen Denmark
| | - J. Campos
- Servicio Enterobacterias; ANLIS-Instituto Carlos G. Malbrán; CABA; Buenos Aires Argentina
| | - K. Pedersen
- National Food Institute; Technical University of Denmark; Mørkhøj Denmark
| | - E.M. Nielsen
- Department of Microbiology and Infection Control; Foodborne Pathogens; Statens Serum Institut; Copenhagen Denmark
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Pepin KM, Spackman E, Brown JD, Pabilonia KL, Garber LP, Weaver JT, Kennedy DA, Patyk KA, Huyvaert KP, Miller RS, Franklin AB, Pedersen K, Bogich TL, Rohani P, Shriner SA, Webb CT, Riley S. Using quantitative disease dynamics as a tool for guiding response to avian influenza in poultry in the United States of America. Prev Vet Med 2013; 113:376-97. [PMID: 24462191 PMCID: PMC3945821 DOI: 10.1016/j.prevetmed.2013.11.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [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: 07/18/2013] [Revised: 11/22/2013] [Accepted: 11/24/2013] [Indexed: 02/02/2023]
Abstract
Wild birds are the primary source of genetic diversity for influenza A viruses that eventually emerge in poultry and humans. Much progress has been made in the descriptive ecology of avian influenza viruses (AIVs), but contributions are less evident from quantitative studies (e.g., those including disease dynamic models). Transmission between host species, individuals and flocks has not been measured with sufficient accuracy to allow robust quantitative evaluation of alternate control protocols. We focused on the United States of America (USA) as a case study for determining the state of our quantitative knowledge of potential AIV emergence processes from wild hosts to poultry. We identified priorities for quantitative research that would build on existing tools for responding to AIV in poultry and concluded that the following knowledge gaps can be addressed with current empirical data: (1) quantification of the spatio-temporal relationships between AIV prevalence in wild hosts and poultry populations, (2) understanding how the structure of different poultry sectors impacts within-flock transmission, (3) determining mechanisms and rates of between-farm spread, and (4) validating current policy-decision tools with data. The modeling studies we recommend will improve our mechanistic understanding of potential AIV transmission patterns in USA poultry, leading to improved measures of accuracy and reduced uncertainty when evaluating alternative control strategies.
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Affiliation(s)
- K M Pepin
- Department of Biology, Colorado State University, Fort Collins, CO, USA; Fogarty International Center, National Institute of Health, Bethesda, MD, USA.
| | - E Spackman
- Southeast Poultry Research Laboratory, Agricultural Research Service, United States Department of Agriculture, Athens, GA, USA.
| | - J D Brown
- Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, GA, USA.
| | - K L Pabilonia
- Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, USA.
| | - L P Garber
- Centers for Epidemiology and Animal Health, Veterinary Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Fort Collins, CO, USA.
| | - J T Weaver
- Centers for Epidemiology and Animal Health, Veterinary Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Fort Collins, CO, USA.
| | - D A Kennedy
- Fogarty International Center, National Institute of Health, Bethesda, MD, USA; Center for Infectious Disease Dynamics, Department of Biology, Pennsylvania State University, State College, PA, USA.
| | - K A Patyk
- Centers for Epidemiology and Animal Health, Veterinary Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Fort Collins, CO, USA.
| | - K P Huyvaert
- Warner College of Natural Resources, Colorado State University, Fort Collins, CO, USA.
| | - R S Miller
- Centers for Epidemiology and Animal Health, Veterinary Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Fort Collins, CO, USA.
| | - A B Franklin
- National Wildlife Research Center, Wildlife Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Fort Collins, CO, USA.
| | - K Pedersen
- National Wildlife Research Center, Wildlife Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Fort Collins, CO, USA.
| | - T L Bogich
- Fogarty International Center, National Institute of Health, Bethesda, MD, USA; Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ, USA.
| | - P Rohani
- Fogarty International Center, National Institute of Health, Bethesda, MD, USA; Department of Ecology and Evolutionary Biology, Center for the Study of Complex Systems, University of Michigan, Ann Arbor, MI, USA.
| | - S A Shriner
- National Wildlife Research Center, Wildlife Services, Animal and Plant Health Inspection Service, United States Department of Agriculture, Fort Collins, CO, USA.
| | - C T Webb
- Department of Biology, Colorado State University, Fort Collins, CO, USA; Fogarty International Center, National Institute of Health, Bethesda, MD, USA.
| | - S Riley
- Fogarty International Center, National Institute of Health, Bethesda, MD, USA; MRC Centre for Outbreak Analysis and Disease Modelling, Department of Infectious Disease Epidemiology, School of Public Health, Imperial College London, Norfolk Place, London, UK.
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Lyhs U, Perko-Mäkelä P, Kallio H, Brockmann A, Heinikainen S, Tuuri H, Pedersen K. Characterization of Clostridium perfringens isolates from healthy turkeys and from turkeys with necrotic enteritis. Poult Sci 2013; 92:1750-7. [DOI: 10.3382/ps.2012-02903] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Barroso L, Abhyankar M, Noor Z, Read K, Pedersen K, White R, Fox C, Petri WA, Lyerly D. Expression, purification, and evaluation of recombinant LecA as a candidate for an amebic colitis vaccine. Vaccine 2013; 32:1218-24. [PMID: 23827311 DOI: 10.1016/j.vaccine.2013.06.056] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [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: 03/07/2013] [Revised: 06/06/2013] [Accepted: 06/19/2013] [Indexed: 11/25/2022]
Abstract
Entamoeba histolytica, which causes amebic colitis and liver abscess, is considered a major enteric pathogen in residents and travelers to developing countries where the disease is endemic. Interaction of this protozoan parasite with the intestine is mediated through the binding of the trophozoite stage to intestinal mucin and epithelium via a galactose and N-acetyl-d-galactosamine (Gal/GalNAc) lectin comprised of a disulfide linked heavy (ca. 180 kDa) and light chain (ca. 35 kDa) and a noncovalently bound intermediate subunit (ca. 150 kDa). Our efforts to develop a vaccine against this pathogen have focused on an internal 578 amino acid fragment, designated LecA, located within the cysteine-rich region of the heavy chain subunit because: (i) it is a major target of adherence-blocking antibodies of seropositive individuals and (ii) vaccination with his-tagged LecA provides protection in animal models. We developed a purification process for preparing highly purified non-tagged LecA using a codon-optimized gene expressed in Escherichia coli. The process consisted of: (i) cell lysis, collection and washing of inclusion bodies; (ii) solubilization and refolding of denatured LecA; and (iii) a polishing gel filtration step. The purified fragment existed primarily as a random coil with β-sheet structure, contained low endotoxin and nucleic acid, was highly immunoreactive, and elicited antibodies that recognized native lectin and that inhibited in vitro adherence of trophozoites to CHO cells. Immunization of CBA mice with LecA resulted in significant protection against cecal colitis. Our procedure yields sufficient amounts of highly purified LecA for future studies on stability, immunogenicity, and protection with protein-adjuvant formulations.
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Affiliation(s)
- L Barroso
- TECHLAB, Inc., 2001 Kraft Drive, Blacksburg, VA 24060-6158, USA
| | - M Abhyankar
- Division of Infectious Diseases and International Health University of Virginia Health System, Carter Harrison Building, Room 1709A, 345 Crispell Drive, P.O. Box 801340, Charlottesville, VA 22908-1340, USA
| | - Z Noor
- Division of Infectious Diseases and International Health University of Virginia Health System, Carter Harrison Building, Room 1709A, 345 Crispell Drive, P.O. Box 801340, Charlottesville, VA 22908-1340, USA
| | - K Read
- TECHLAB, Inc., 2001 Kraft Drive, Blacksburg, VA 24060-6158, USA
| | - K Pedersen
- TECHLAB, Inc., 2001 Kraft Drive, Blacksburg, VA 24060-6158, USA
| | - R White
- TECHLAB, Inc., 2001 Kraft Drive, Blacksburg, VA 24060-6158, USA
| | - C Fox
- Infectious Disease Research Institute, Seattle, WA, USA
| | - W A Petri
- Division of Infectious Diseases and International Health University of Virginia Health System, Carter Harrison Building, Room 1709A, 345 Crispell Drive, P.O. Box 801340, Charlottesville, VA 22908-1340, USA
| | - D Lyerly
- TECHLAB, Inc., 2001 Kraft Drive, Blacksburg, VA 24060-6158, USA.
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Brown VL, Drake JM, Stallknecht DE, Brown JD, Pedersen K, Rohani P. Dissecting a wildlife disease hotspot: the impact of multiple host species, environmental transmission and seasonality in migration, breeding and mortality. J R Soc Interface 2013; 10:20120804. [PMID: 23173198 DOI: 10.1098/rsif.2012.0804] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Avian influenza viruses (AIVs) have been implicated in all human influenza pandemics in recent history. Despite this, surprisingly little is known about the mechanisms underlying the maintenance and spread of these viruses in their natural bird reservoirs. Surveillance has identified an AIV 'hotspot' in shorebirds at Delaware Bay, in which prevalence is estimated to exceed other monitored sites by an order of magnitude. To better understand the factors that create an AIV hotspot, we developed and parametrized a mechanistic transmission model to study the simultaneous epizootiological impacts of multi-species transmission, seasonal breeding, host migration and mixed transmission routes. We scrutinized our model to examine the potential for an AIV hotspot to serve as a 'gateway' for the spread of novel viruses into North America. Our findings identify the conditions under which a novel influenza virus, if introduced into the system, could successfully invade and proliferate.
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Affiliation(s)
- V L Brown
- Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI 48109, USA.
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Clavijo A, Nikooienejad A, Esfahani MS, Metz RP, Schwartz S, Atashpaz-Gargari E, Deliberto TJ, Lutman MW, Pedersen K, Bazan LR, Koster LG, Jenkins-Moore M, Swenson SL, Zhang M, Beckham T, Johnson CD, Bounpheng M. Identification and analysis of the first 2009 pandemic H1N1 influenza virus from U.S. feral swine. Zoonoses Public Health 2012; 60:327-35. [PMID: 22978260 DOI: 10.1111/zph.12006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The first case of pandemic H1N1 influenza (pH1N1) virus in feral swine in the United States was identified in Texas through the United States Department of Agriculture (USDA) Wildlife Services' surveillance program. Two samples were identified as pandemic influenza by reverse transcriptase quantitative PCR (RT-qPCR). Full-genome Sanger sequencing of all eight influenza segments was performed. In addition, Illumina deep sequencing of the original diagnostic samples and their respective virus isolation cultures were performed to assess the feasibility of using an unbiased whole-genome linear target amplification method and multiple sample sequencing in a single Illumina GAIIx lane. Identical sequences were obtained using both techniques. Phylogenetic analysis indicated that all gene segments belonged to the pH1N1 (2009) lineage. In conclusion, we have identified the first pH1N1 isolate in feral swine in the United States and have demonstrated the use of an easy unbiased linear amplification method for deep sequencing of multiple samples.
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Affiliation(s)
- A Clavijo
- Texas Veterinary Medical Diagnostic Laboratory, College Station, TX, USA.
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Anderson C, Assyia D, Bannerman K, Fehr A, Hermanson J, Hron N, Hsu J, Larson N, Long G, Long J, Mann D, McLean R, Menon V, Mohar G, Moret F, Nguyen V, O'Leary K, Pedersen K, Pohl R, Reynolds H, Rice A, Rodriguez T, Rottinghaus A, Schaefer T, Scott T, Strombom K, Vollick J, Wehemyer G, Whitcomb B, Taghizadeh A, Whalen J, Kessler E. Cholera toxin: Vibrio cholera's dehydration machine. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.lb270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- C. Anderson
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - D. Assyia
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - K. Bannerman
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - A. Fehr
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - J. Hermanson
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - N. Hron
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - J. Hsu
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - N. Larson
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - G. Long
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - J. Long
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - D. Mann
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - R. McLean
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - V. Menon
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - G. Mohar
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - F. Moret
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - V. Nguyen
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - K. O'Leary
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - K. Pedersen
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - R. Pohl
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - H. Reynolds
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - A. Rice
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - T. Rodriguez
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - A. Rottinghaus
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - T. Schaefer
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - T. Scott
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - K. Strombom
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - J. Vollick
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - G. Wehemyer
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - B. Whitcomb
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - A. Taghizadeh
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - J. Whalen
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
| | - E. Kessler
- Blue Valley Center for Advanced Professional StudiesOverland ParkKS
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Hauge IHR, Pedersen K, Sanderud A, Hofvind S, Olerud HM. Patient doses from screen-film and full-field digital mammography in a population-based screening programme. Radiat Prot Dosimetry 2012; 148:65-73. [PMID: 21335333 DOI: 10.1093/rpd/ncq598] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The aim of this study was to compare mean glandular dose (MGD) in all full-field digital mammography (FFDM) and screen film mammography (SFM) systems used in a national mammography screening program. MGD from 31 screening units (7 FFDM and 24 SFM), based on an average of 50 women at each screening unit, representing 12 X-ray models (6 FFDM and 6 SFM) from five different manufacturers were calculated. The MGD was significantly lower for FFDM compared with SFM (craniocaudal): 1.19 versus 1.27 mGy, respectively, mediolateral oblique: 1.33 versus 1.45 mGy, respectively), but not all of the FFDM units provided lower doses than the SFM units. Comparing FFDMs, the photon counting scanning-slit technology provides significantly lower MGDs than direct and indirect conversion digital technology. The choice of target/filter combination influences the MGD, and has to be optimised with regard to breast thickness.
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Affiliation(s)
- I H R Hauge
- Faculty of Health Sciences, Oslo University College, PO Box 4 St. Olavs plass, NO-0130 Oslo, Norway.
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Agerso Y, Aarestrup FM, Pedersen K, Seyfarth AM, Struve T, Hasman H. Prevalence of extended-spectrum cephalosporinase (ESC)-producing Escherichia coli in Danish slaughter pigs and retail meat identified by selective enrichment and association with cephalosporin usage. J Antimicrob Chemother 2011; 67:582-8. [DOI: 10.1093/jac/dkr507] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Moll H, Glorius M, Johnsson A, Schäfer M, Budzikiewicz H, Pedersen K, Bernhard G. Neptunium(V) complexation by natural pyoverdins and related model compounds. ACTA ACUST UNITED AC 2010. [DOI: 10.1524/ract.2010.1755] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
Ubiquitous fluorescent Pseudomonas species secrete bacterial pyoverdin-type siderophores. These bioligands have great potential to bind and transport actinides in the environment due to their hydroxamate and catechol functionalities. We investigated the unknown interaction of the neptunyl cation (NpO2
+) with pyoverdins (PYO) released by Pseudomonas fluorescens (CCUG 32456) cells and with simple hydroxamate (salicylhydroxamic acid: SHA and benzohydroxamic acid: BHA) and catechol (2,3-dihydroxynaphthalene: NAP) ligands using near-infrared (NIR) absorption spectroscopy over a wide pH range. NpO2
+-bioligand species of the MxLyHz type were identified from the spectrophotometric titrations in all four systems. The 1:1:2, 1:1:1, and 1:1:0 complexes were determined with the pyoverdins. In addition to 1:1 species, SHA, BHA, and NAP also form 1:2:0 species with NpO2
+. The stability constants of these neptunyl(V)-bioligand complexes and their individual spectroscopic properties are reported. Our findings indicate that NpO2
+ has a stronger affinity to the catechol functionality of the pyoverdin molecule. The identified NpO2
+-PYO species belong to the strongest NpO2
+ complexes with organic material reported so far.
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Affiliation(s)
| | - Maja Glorius
- Institut für Radiochemie, Forschungszentrum Rossendorf e.V., Dresden
| | - A. Johnsson
- Göteborg University, Dep. of Cell and Molecular Biology, Göteborg, Schweden
| | - M. Schäfer
- Universität zu Köln, Institut für Organische Chemie, Köln
| | | | - K. Pedersen
- Göteborg University, Department of Cell and Molecular Biology, Göteborg, Schweden
| | - Gert Bernhard
- Forschungszentrum Rossendorf e.V., Institute of Radiochemistry, Dresden, Deutschland
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Lund M, Bjerrum L, Pedersen K. Quantification of Faecalibacterium prausnitzii- and Subdoligranulum variabile-like bacteria in the cecum of chickens by real-time PCR. Poult Sci 2010; 89:1217-24. [PMID: 20460669 DOI: 10.3382/ps.2010-00653] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The intestinal microbial community is playing an important role in health and production performance of chickens. To understand the effect on the intestinal microflora induced by various feeding strategies, feed additives, infections, and intestinal disorders, it is important to have methods for quantifying potentially important bacteria in the intestine. We describe a real-time quantitative assay for detection and quantification of a whole group of Faecalibacterium prausnitzii and Subdoligranulum variabile-like bacteria, which has recently been found to dominate in the cecum of broiler chickens. The F. prausnitzii-S. variabile-like bacteria were quantified using a multiprobe assay in which one primer set was used to amplify DNA from all bacteria, whereas 2 probes detected all bacteria and the group of F. prausnitzii-S. variabile-like bacteria, respectively. The multiprobe assay accurately quantified the percentage of this group in a sample if it constituted more than approximately 5% of the total bacterial community. If the fraction of F. prausnitzii-S. variabile-like bacteria was lower than 5%, a duplex assay was applied in which the total bacteria were amplified in one tube and the F. prausnitzii-S. variabile-like group of bacteria was amplified in another tube using a specific forward primer. The F. prausnitzii-S. variabile-like group of bacteria was quantified in the cecum and ileum of conventional and organic raised chickens, in chickens kept in an isolator from 1 d of age, and in hatcher material. Quantification of this group of F. prausnitzii-S. variabile-like bacteria has not been performed before by real-time PCR, but results confirm previous results obtained by cloning and sequencing showing that the F. prausnitzii-S. variabile-like group of bacteria constitutes a major fraction of the cecal bacterial community in chickens. Furthermore, results indicate that the poultry farm environment plays a role in recruitment and development of these bacteria in the intestinal microflora.
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Affiliation(s)
- M Lund
- National Veterinary Institute, Technical University of Denmark, Hangøvej 2, DK-8200 Aarhus N, Denmark.
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Larkins BA, Pedersen K, Handa AK, Hurkman WJ, Smith LD. Synthesis and processing of maize storage proteins in Xenopus laevis oocytes. Proc Natl Acad Sci U S A 2010; 76:6448-52. [PMID: 16592743 PMCID: PMC411882 DOI: 10.1073/pnas.76.12.6448] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Xenopus oocytes injected with zein mRNAs efficiently synthesized maize storage proteins for prolonged periods. Under optimal conditions, zein was synthesized at 3 ng/hr and represented approximately 10% of the total protein synthesized in the oocyte. The mRNA from the normal maize inbred line directed synthesis of all the major zein components; however, products of mRNA from the opaque-2 mutant did not contain the largest zein component. Zein proteins synthesized in the oocyte were 2000 daltons smaller than proteins synthesized by cell-free translation of mRNAs in the wheat germ and reticulocyte systems. This result, which suggested that the oocyte processed prezein polypeptides into native zein proteins, was confirmed by amino-terminal sequence analysis of zein proteins from the oocytes. Cyanogen bromide cleavage of translation products from oocytes and the wheat germ system confirmed the existence of several proteins within each of the major zein components. However, we were unable to detect the presence of signal sequences on zein peptides by this technique.
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Affiliation(s)
- B A Larkins
- Department of Botany and Plant Pathology, Purdue University, West Lafayette, Indiana 47907
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Pedersen K. Analysis of copper corrosion in compacted bentonite clay as a function of clay density and growth conditions for sulfate‐reducing bacteria. J Appl Microbiol 2010; 108:1094-1104. [DOI: 10.1111/j.1365-2672.2009.04629.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- K. Pedersen
- Department of Cell and Molecular Biology, Microbiology, University of Gothenburg, Göteborg, Sweden
- Microbial Analytics Sweden AB, Mölnlycke, Sweden
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Abstract
The distribution on serovars of 60 Salmonella isolates from reptiles kept in captivity in Denmark during the period 1995-2006 was investigated. The isolates were all recovered from clinical specimens submitted to the National Veterinary Institute. A majority of the samples were from reptiles in zoological gardens or similar, while a minor number was from reptiles kept in private homes. A total of 43 serovars were detected, most of them being what is usually called exotic serotypes, and many not having a trivial name, while a few isolates belonged to well-known human pathogenic serovars, such as S. Enteritidis, S. Typhimurium, S. Bovismorbificans. One isolate was rough and two were non-typeable. Isolates from turtles belonged to the subspecies enterica, while many isolates from both sauria and snakes belonged to other subspecies. The findings underline the potential zoonotic risk by handling reptiles in zoological garden or other public settings, or keeping pet reptiles in private homes.
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Affiliation(s)
- K Pedersen
- University of Copenhagen, Faculty of Life Sciences, Department of Veterinary Pathobiology, Frederiksberg C, Denmark.
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Nybo L, Pedersen K, Christensen B, Aagaard P, Brandt N, Kiens B. Impact of carbohydrate supplementation during endurance training on glycogen storage and performance. Acta Physiol (Oxf) 2009; 197:117-27. [PMID: 19432594 DOI: 10.1111/j.1748-1716.2009.01996.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [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: 11/29/2022]
Abstract
AIM Glucose ingestion may improve exercise endurance, but it apparently also influences the transcription rate of several metabolic genes and it alters muscle metabolism during an acute exercise bout. Therefore, we investigated how chronic training responses are affected by glucose ingestion. METHODS In previously untrained males performance and various muscular adaptations were evaluated before and after 8 weeks of supervised endurance training conducted either with (n = 8; CHO group) or without (n = 7; placebo) glucose supplementation. RESULTS The two groups achieved similar improvements in maximal oxygen uptake and peak power output during incremental cycling (both parameters elevated by 17% on average) and both groups lost approximately 3 kg of fat mass during the 8 weeks of training. An equal reduction in respiratory exchange ratio (0.02 units) during submaximal exercise was observed in both groups. Beta-hydroxyacyl-CoA-dehydrogenase activity was increased in both groups, however, to a larger extent in the placebo group (45 +/- 11%) than CHO (23 +/- 9%, P < 0.05). GLUT-4 protein expression increased by 74 +/- 14% in the placebo group and 45 +/- 14% in CHO (both P < 0.05), while resting muscle glycogen increased (P < 0.05) to a larger extent in the placebo group (96 +/- 4%) than CHO (33 +/- 2%). CONCLUSION These results show that carbohydrate supplementation consumed during exercise training influences various muscular training adaptations, but improvements in cardiorespiratory fitness and reductions in fat mass are not affected.
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Affiliation(s)
- L Nybo
- Institute of Exercise and Sport Sciences, University of Copenhagen, Copenhagen, Denmark.
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Staples M, Elwood M, St John J, Howes F, Pedersen K. Perceived impact on clinical practice and logistical issues in clinical management surveys of cancer: Australian experience. Qual Saf Health Care 2009; 18:195-8. [PMID: 19468001 DOI: 10.1136/qshc.2007.024398] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND In September 2004, 28 published and 17 ongoing clinical management surveys (CMS) of cancer in Australia were identified, describing the clinical management of representative series of cancer patients. The present study assessed the perceived influence of these on clinical practice and the logistical issues involved in conducting a CMS. METHODS AND MATERIALS Questionnaire sent to a key clinical investigator in each survey. RESULTS For the 28 published CMS, respondents (response rate 54%) reported that the CMS were influential in half or more of subsequent changes in the development or implementation of standard protocols, increasing specialist involvement in clinical trials, reducing variability in practice, and providing informed choice for patients. The surveys were regarded as influential in a third to half of noted changes in the use of evidence-based treatments, multidisciplinary care, and standardised collection of data. For CMS in progress, respondents (response rate 65%) reported on objectives and logistical issues, with the need for multiple ethical approvals emerging as a major issue. CONCLUSION CMS of cancer have played a modest but important role in stimulating and supporting improvements in clinical care in Australia. Many Australian surveys have been large and population-based and with high response rates. The recent introduction of a requirement for patient consent by some (but not all) ethical committees greatly increases the difficulties and costs of such surveys.
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Affiliation(s)
- M Staples
- National Cancer ControlInitiative, Carlton, Australia
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