1
|
Mellor KC, Petrovska L, Thomson NR, Harris K, Reid SWJ, Mather AE. Antimicrobial Resistance Diversity Suggestive of Distinct Salmonella Typhimurium Sources or Selective Pressures in Food-Production Animals. Front Microbiol 2019; 10:708. [PMID: 31031720 PMCID: PMC6473194 DOI: 10.3389/fmicb.2019.00708] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Accepted: 03/21/2019] [Indexed: 11/13/2022] Open
Abstract
Salmonella enterica subsp. enterica serovar Typhimurium is a common cause of enterocolitis in humans globally, with multidrug resistant (MDR) strains posing an enhanced threat. S. Typhimurium is also a pathogen in food-production animals, and these populations can act as reservoirs of the bacterium. Therefore, surveillance and control measures within food-production animal populations are of importance both to animal and human health and have the potential to be enhanced though improved understanding of the epidemiology of S. Typhimurium within and between food-production animal populations. Here, data from Scotland and national surveillance England and Wales data for isolates from cattle (n = 1115), chickens (n = 248) and pigs (n = 2174) collected between 2003 and 2014 were analyzed. Ecological diversity analyses and rarefaction curves were used to compare the diversity of observed antimicrobial resistance (AMR) profiles between the host species, and within host species populations. Higher AMR profile diversity was observed in isolates from pigs compared to chickens across diversity measures and isolates from cattle for three of four diversity measures. Variation in AMR profile diversity between production sectors was noted, with higher AMR diversity of isolates from broiler compared to layer chickens, breeder compared to rearer and finisher pigs and beef compared to dairy cattle. Findings indicate variation in AMR profile diversity both within and between food-production animal host species. These observations suggest alternate sources of AMR bacteria and/or variation in selective evolutionary pressures within and between food-production animal host species populations.
Collapse
Affiliation(s)
- Kate C. Mellor
- Royal Veterinary College, Hatfield, United Kingdom
- London School of Hygiene & Tropical Medicine, London, United Kingdom
| | | | - Nicholas R. Thomson
- London School of Hygiene & Tropical Medicine, London, United Kingdom
- Wellcome Trust Sanger Institute, Wellcome Genome Campus, Hinxton, United Kingdom
| | - Kate Harris
- Animal and Plant Health Agency, Weybridge, United Kingdom
| | | | | |
Collapse
|
3
|
De Ridder L, Maes D, Dewulf J, Butaye P, Pasmans F, Boyen F, Haesebrouck F, Van der Stede Y. Use of a live attenuated Salmonella enterica serovar Typhimurium vaccine on farrow-to-finish pig farms. Vet J 2014; 202:303-8. [PMID: 25278382 DOI: 10.1016/j.tvjl.2014.09.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Revised: 09/08/2014] [Accepted: 09/13/2014] [Indexed: 11/16/2022]
Abstract
Salmonella enterica infection in pigs is economically important and poses a zoonotic risk. In this study, the efficacy of an attenuated S. enterica serovar Typhimurium strain was evaluated in three farrow-to-finish pig herds. In each herd, 120 piglets were vaccinated orally at 3 and 24 days of age, while 120 piglets served as unvaccinated controls. Faeces, ileocaecal lymph nodes and caecal contents were examined for S. Typhimurium by isolation and serum was analysed for antibodies against S. Typhimurium by ELISA. All pigs were weighed at pre-weaning and slaughter to determine daily weight gain. In vaccinated pigs prior to slaughter, significantly fewer animals excreted S. enterica, there was a significantly lower S. enterica-specific mean antibody titre and there was a significantly higher mean daily weight gain compared to unvaccinated controls. In two herds, there were significantly lower proportions of S. enterica positive ileocaecal lymph nodes and caecal contents at slaughter between the vaccinated and control groups, but this difference was not significant across all three herds. S. enterica with the same auxotrophic characteristics and genotype as the vaccine strain was isolated from several samples of faeces, ileocaecal lymph nodes and caecal contents from vaccinated pigs. These findings indicate that vaccination with an attenuated S. Typhimurium strain reduces S. enterica shedding, but the reduction is not consistent and the vaccine strain may persist in tissues.
Collapse
Affiliation(s)
- L De Ridder
- Unit of Co-ordination Veterinary Diagnose-Epidemiology and Risk Analysis, CODA-CERVA, Groeselenberg 99, 1180 Ukkel, Belgium; Department of Obstetrics, Reproduction and Herd Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - D Maes
- Department of Obstetrics, Reproduction and Herd Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium.
| | - J Dewulf
- Department of Obstetrics, Reproduction and Herd Health, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - P Butaye
- Unit of Co-ordination Veterinary Diagnose-Epidemiology and Risk Analysis, CODA-CERVA, Groeselenberg 99, 1180 Ukkel, Belgium; Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - F Pasmans
- Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - F Boyen
- Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - F Haesebrouck
- Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | - Y Van der Stede
- Unit of Co-ordination Veterinary Diagnose-Epidemiology and Risk Analysis, CODA-CERVA, Groeselenberg 99, 1180 Ukkel, Belgium; Department of Virology, Parasitology and Immunology, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| |
Collapse
|
4
|
Albino LA, Rostagno MH, Húngaro HM, Mendonça RC. Isolation, Characterization, and Application of Bacteriophages for Salmonella spp. Biocontrol in Pigs. Foodborne Pathog Dis 2014; 11:602-9. [DOI: 10.1089/fpd.2013.1600] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Luiz A.A. Albino
- Departamento de Tecnologia de Alimentos, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Marcos H. Rostagno
- Department of Animal Sciences, Purdue University, West Lafayette, Indiana
| | - Humberto M. Húngaro
- Departamento de Tecnologia de Alimentos, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| | - Regina C.S. Mendonça
- Departamento de Tecnologia de Alimentos, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil
| |
Collapse
|
5
|
Parada J, Carranza A, Pichel M, Tamiozzo P, Pelliza B, Ambrogi A. Salmonella transmission from the gilt to her offspring. Livest Sci 2013. [DOI: 10.1016/j.livsci.2013.09.010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
6
|
Longitudinal study of Salmonella shedding in naturally infected finishing pigs. Epidemiol Infect 2012; 141:1928-36. [DOI: 10.1017/s0950268812002464] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
SUMMARYA 3-year longitudinal study was conducted on a multi-site farrow-to-finish production system. For each of 18 cohorts at three finishing sites, 50 pigs were randomly selected. Faecal samples were collected every 2 weeks for 16 weeks. Salmonella was cultured from 453 (6·6%) of 6836 faecal samples. The pig-level incidence of Salmonella was 20·8% (187/899 pigs). Salmonella prevalence varied between cohorts and within pigs. The adjusted Salmonella prevalence decreased over the finishing period from 6·4% to 0·8%. Intermittent detection of Salmonella was found in more than 50% of pigs that were positive at more than one collection. The finding that the majority of pigs shed intermittently has implications for surveillance and research study design when determining Salmonella status. The variability in shedding over time, as well as between and within cohorts and pigs suggests that there may be time-variant risk factors for Salmonella shedding in swine.
Collapse
|