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Stapleton GS, Habrun C, Nemechek K, Gollarza L, Ellison Z, Tolar B, Koski L, Brandenburg JM, Salah Z, Palacios A, Basler C, Varela K, Nichols M, Benedict K. Multistate outbreaks of salmonellosis linked to contact with backyard poultry-United States, 2015-2022. Zoonoses Public Health 2024; 71:708-722. [PMID: 38686950 PMCID: PMC11368616 DOI: 10.1111/zph.13134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 03/05/2024] [Accepted: 04/04/2024] [Indexed: 05/02/2024]
Abstract
AIMS Contact with backyard poultry (i.e., privately-owned, non-commercial poultry) was first associated with a multistate outbreak of salmonellosis in 1955. In recent years, backyard poultry-associated salmonellosis outbreaks have caused more illnesses in the United States than salmonellosis outbreaks linked to any other type of animal. Here, we describe the epidemiology of outbreaks from 2015-2022 to inform prevention efforts. METHODS AND RESULTS During 2015-2022, there were 88 multistate backyard poultry-associated salmonellosis outbreaks and 7866 outbreak-associated illnesses caused by 21 different Salmonella serotypes. Salmonella Enteritidis accounted for the most outbreaks (n = 21) and illnesses (n = 2400) of any serotype. Twenty-four percent (1840/7727) of patients with available information were <5 years of age. In total, 30% (1710/5644) of patients were hospitalized, and nine deaths were attributed to Salmonella infection. Throughout this period, patients reported behaviours that have a higher risk of Salmonella transmission, including kissing or snuggling poultry or allowing poultry inside their home. CONCLUSIONS Despite ongoing efforts to reduce the burden of salmonellosis associated with backyard poultry, outbreak-associated illnesses have nearly tripled and hospitalizations more than quadrupled compared with those in 1990-2014. Because this public health problem is largely preventable, government officials, human and veterinary healthcare providers, hatcheries, and retailers might improve the prevention of illnesses by widely disseminating health and safety recommendations to the public and by continuing to develop and implement prevention measures to reduce zoonotic transmission of Salmonella by backyard poultry.
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Affiliation(s)
- G. Sean Stapleton
- Division of Foodborne, Waterborne and Environmental Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Caroline Habrun
- Division of Foodborne, Waterborne and Environmental Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Kaylea Nemechek
- Division of Foodborne, Waterborne and Environmental Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
- Oak Ridge institute for Science and Education, Oak Ridge, Tennessee, USA
| | - Lauren Gollarza
- Division of Foodborne, Waterborne and Environmental Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Zachary Ellison
- Division of Foodborne, Waterborne and Environmental Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
- ASRT, Inc., Smyrna, Georgia, USA
| | - Beth Tolar
- Division of Foodborne, Waterborne and Environmental Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Lia Koski
- Division of Foodborne, Waterborne and Environmental Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Joshua M. Brandenburg
- Division of Foodborne, Waterborne and Environmental Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Zainab Salah
- Division of Foodborne, Waterborne and Environmental Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Alexandra Palacios
- Division of Foodborne, Waterborne and Environmental Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Colin Basler
- Division of Foodborne, Waterborne and Environmental Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Kate Varela
- Division of Foodborne, Waterborne and Environmental Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Megin Nichols
- Division of Foodborne, Waterborne and Environmental Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Katharine Benedict
- Division of Foodborne, Waterborne and Environmental Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
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Traore KA, Aboubacar-Paraiso AR, Bouda SC, Ouoba JB, Kagambèga A, Roques P, Barro N. Characteristics of Nontyphoid Salmonella Isolated from Human, Environmental, Animal, and Food Samples in Burkina Faso: A Systematic Review and Meta-Analysis. Antibiotics (Basel) 2024; 13:556. [PMID: 38927222 PMCID: PMC11200751 DOI: 10.3390/antibiotics13060556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 04/25/2024] [Accepted: 05/01/2024] [Indexed: 06/28/2024] Open
Abstract
Salmonella is one of the world's leading causes of zoonotic and foodborne illnesses. Recently, antimicrobial resistance (AMR) has become one of the most critical challenges to public health and food safety. Herein, we employed a meta-analysis to determine the pooled prevalence and spatiotemporal distribution of serovars and antimicrobial resistance in NTS in Burkina Faso. To find eligible articles, a comprehensive literature search of PubMed, African Journals Online, ScienceDirect, Google Scholar, and the gray literature (university libraries) in Burkina was conducted for the period from 2008 to 2020. Studies meeting the inclusion criteria were selected and assessed for risk of bias. To assess the temporal and spatial relationships between serotypes and resistant strains from humans, animals, food, and the environment, a random-effects statistical model meta-analysis was carried out using the Comprehensive Meta-Analysis Version 3.0 program. The NTS prevalence rates were 4.6% (95% CI: 3-7) and 20.1% (95% CI: 6.6-47.4) in humans and animals, respectively, and 16.8% (95% CI: 10.5-25.8) and 15.6% (95% CI: 8.2-27.5) in food and the environment, respectively. Most NTS serovars were S. Derby, reported both in food and animals, and S. Typhimurium, reported in humans, while S. Croft II, S. Jodpur II, and S. Kentucky were the most prevalent in the environment. NTS isolates were highly resistant to erythromycin, amoxicillin, cefixime, and cephalothin, with a pooled prevalence of multidrug resistance of 29% (95% CI: 14.5-49.5). The results of this review show a high diversity of Salmonella serotypes, as well as high antibiotic resistance in Salmonella isolates from animal, human, food, and environmental samples in Burkina, calling for a consolidated "One Health" approach to better understand the drivers of pathogen emergence, spread, and antimicrobial resistance, as well as the formulation of intervention measures needed to limit the risk associated with the disease.
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Affiliation(s)
- Kuan Abdoulaye Traore
- Laboratoire de Biologie Moléculaire, d’Epidémiologie et de Surveillance des Bactéries et Virus Transmissibles par les Aliments (LaBESTA), Université Joseph KI-ZERBO (UJKZ), Ouagadougou 03 BP 7021, Burkina Faso; (A.R.A.-P.)
- Laboratoire Sciences de la Vie et de la Terre (LaSVT), Université Norbert ZONGO (UNZ), Koudougou BP 376, Burkina Faso
| | - Abdoul Rachid Aboubacar-Paraiso
- Laboratoire de Biologie Moléculaire, d’Epidémiologie et de Surveillance des Bactéries et Virus Transmissibles par les Aliments (LaBESTA), Université Joseph KI-ZERBO (UJKZ), Ouagadougou 03 BP 7021, Burkina Faso; (A.R.A.-P.)
| | - Soutongnooma Caroline Bouda
- Laboratoire de Biologie Moléculaire, d’Epidémiologie et de Surveillance des Bactéries et Virus Transmissibles par les Aliments (LaBESTA), Université Joseph KI-ZERBO (UJKZ), Ouagadougou 03 BP 7021, Burkina Faso; (A.R.A.-P.)
| | - Jean Bienvenue Ouoba
- Laboratoire de Biologie Moléculaire, d’Epidémiologie et de Surveillance des Bactéries et Virus Transmissibles par les Aliments (LaBESTA), Université Joseph KI-ZERBO (UJKZ), Ouagadougou 03 BP 7021, Burkina Faso; (A.R.A.-P.)
- Centre Universitaire de Manga (CUM), Université Norbert ZONGO (UNZ), Koudougou BP 376, Burkina Faso
| | - Assèta Kagambèga
- Laboratoire de Biologie Moléculaire, d’Epidémiologie et de Surveillance des Bactéries et Virus Transmissibles par les Aliments (LaBESTA), Université Joseph KI-ZERBO (UJKZ), Ouagadougou 03 BP 7021, Burkina Faso; (A.R.A.-P.)
- Department of Biology, Institute of Sciences (IDS), Ouagadougou 1757, Burkina Faso
| | - Pierre Roques
- Virology Unit, Institut Pasteur de Guinée (IPGui), Conakry 4416, Guinea;
| | - Nicolas Barro
- Laboratoire de Biologie Moléculaire, d’Epidémiologie et de Surveillance des Bactéries et Virus Transmissibles par les Aliments (LaBESTA), Université Joseph KI-ZERBO (UJKZ), Ouagadougou 03 BP 7021, Burkina Faso; (A.R.A.-P.)
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Gentile N, Carrasquer F, Marco-Fuertes A, Marin C. Backyard poultry: exploring non-intensive production systems. Poult Sci 2024; 103:103284. [PMID: 38056053 PMCID: PMC10749279 DOI: 10.1016/j.psj.2023.103284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2023] [Revised: 11/06/2023] [Accepted: 11/13/2023] [Indexed: 12/08/2023] Open
Abstract
The concept of backyard poultry historically encompassed "food-producing animals." Nevertheless, a recent shift in livestock production paradigms within developed countries is evident, as backyard poultry owners now raise their birds for purposes beyond self-consumption, raising animals in a familiar way, and fostering emotional bonds with them. Because backyard animals are frequently privately owned, and the resulting products are typically not marketed, very little information is available about the demographic profile of backyard owners and information on flocks' characteristics, husbandry, and welfare. Thus, this review aims to clarify the characteristics of backyard poultry, highlighting the prevalent infectious diseases and the zoonotic risk to which farmers are exposed. According to the FAO, there are different types of poultry production systems: intensive, sub-intensive, and extensive. The system conditions, requirements, and the resulting performance differ extensively due to the type of breed, feeding practices, prevalence of disease, prevention and control of diseases, flock management, and the interactions among all these factors. The presence and transmission of infectious diseases in avian species is a problem that affects both the animals themselves and public health. Bacterial (Escherichia coli, Salmonella, Campylobacter, and Mycoplasma), parasitic (helminths, louses, and mites), and viral (Avian influenza, Newcastle, Marek, Infectious Bronchitis, Gumboro, Infectious Laringotracheitis, and Fowlpox) are the most important pathogens involved in backyard poultry health. In addition, Avian influenza, Salmonella, Campylobacter, and E. coli, could be a risk for backyard farmers and/or backyard-derived products consumers. Thus, proper biosecurity implementation measures are mandatory to control them. While the principles and practices of on-farm biosecurity may be well-versed among commercial farmers, hobbyists, and backyard farmers might not be familiar with the necessary steps to protect their flocks from infectious diseases and curb their transmission. This sector represents the fourth category of poultry farming, characterized by the lowest biosecurity standards. Consequently, it is imperative to address the legal status of backyard poultry, educate owners about biosecurity measures, and promote proper veterinary care and disease control.
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Affiliation(s)
- Nicla Gentile
- Department of Veterinary Medical Sciences, University of Bologna, Ozzano dell'Emilia, Italy; Departamento de Producción y Sanidad Animal, Salud Pública Veterinaria y Ciencia y Tecnología de los Alimentos, Facultad de Veterinaria, Instituto de Ciencias Biomédicas, Universidad Cardenal Herrera-CEU, CEU Universities, 46115 Alfara del Patriarca, Valencia, Spain
| | - Fernando Carrasquer
- H&N International GmbH, 27472 Cuxhaven, Germany; Institute of Science and Animal Technology, Universitat Politècnica de Valencia, 46022 Valencia, Spain
| | - Ana Marco-Fuertes
- Departamento de Producción y Sanidad Animal, Salud Pública Veterinaria y Ciencia y Tecnología de los Alimentos, Facultad de Veterinaria, Instituto de Ciencias Biomédicas, Universidad Cardenal Herrera-CEU, CEU Universities, 46115 Alfara del Patriarca, Valencia, Spain
| | - Clara Marin
- Departamento de Producción y Sanidad Animal, Salud Pública Veterinaria y Ciencia y Tecnología de los Alimentos, Facultad de Veterinaria, Instituto de Ciencias Biomédicas, Universidad Cardenal Herrera-CEU, CEU Universities, 46115 Alfara del Patriarca, Valencia, Spain.
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Urzúa-Encina C, Fernández-Sanhueza B, Pavez-Muñoz E, Ramírez-Toloza G, Lujan-Tomazic M, Rodríguez AE, Alegría-Morán R. Epidemiological Characterization of Isolates of Salmonella enterica and Shiga Toxin-Producing Escherichia coli from Backyard Production System Animals in the Valparaíso and Metropolitana Regions. Animals (Basel) 2023; 13:2444. [PMID: 37570253 PMCID: PMC10417532 DOI: 10.3390/ani13152444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 06/25/2023] [Accepted: 06/29/2023] [Indexed: 08/13/2023] Open
Abstract
Backyard production systems (BPS) are distributed worldwide, rearing animals recognized as reservoirs of Salmonella enterica and Shiga toxin-producing Escherichia coli (STEC), both zoonotic pathogens. The aim of this study was to characterize isolates of both pathogens obtained from animals raised in BPS from two central Chile regions. The presence of pathogens was determined by bacterial culture and confirmatory PCR for each sampled BPS, calculating positivity rates. Multivariate logistic regression was used to determine risk factors. Additionally, phenotypic antimicrobial resistance was determined. A positivity rate of 2.88% for S. enterica and 14.39% for STEC was determined for the complete study region (Valparaíso and Metropolitana regions). Risk factor analysis suggests that the presence of ruminants (OR = 1.03; 95% CI = 1.002-1.075) increases the risk of STEC-positive BPS, and the presence of ruminants (OR = 1.05; 95% CI = 1.002-1.075) and the animal handlers being exclusively women (OR = 3.54; 95% CI = 1.029-12.193) increase the risk for S. enterica/STEC positivity. Eighty percent of S. enterica isolates were multidrug resistant, and all STEC were resistant to Cephalexin. This study evidences the circulation of multidrug-resistant zoonotic bacterial strains in animals kept in BPS and the presence of factors that modify the risk of BPS positivity for both pathogens.
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Affiliation(s)
- Constanza Urzúa-Encina
- Departamento de Medicina Preventiva Animal, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santa Rosa 11735, La Pintana, Santiago 8820808, Chile; (C.U.-E.); (B.F.-S.); (E.P.-M.); (G.R.-T.)
- Laboratorio Centralizado de Investigación Veterinaria, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santa Rosa 11735, La Pintana, Santiago 8820808, Chile
| | - Bastián Fernández-Sanhueza
- Departamento de Medicina Preventiva Animal, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santa Rosa 11735, La Pintana, Santiago 8820808, Chile; (C.U.-E.); (B.F.-S.); (E.P.-M.); (G.R.-T.)
- Laboratorio Centralizado de Investigación Veterinaria, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santa Rosa 11735, La Pintana, Santiago 8820808, Chile
- Escuela de Medicina Veterinaria, Sede Santiago, Facultad de Recursos Naturales y Medicina Veterinaria, Universidad Santo Tomás, Ejercito Libertador 146, Santiago 8370003, Chile
| | - Erika Pavez-Muñoz
- Departamento de Medicina Preventiva Animal, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santa Rosa 11735, La Pintana, Santiago 8820808, Chile; (C.U.-E.); (B.F.-S.); (E.P.-M.); (G.R.-T.)
- Laboratorio Centralizado de Investigación Veterinaria, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santa Rosa 11735, La Pintana, Santiago 8820808, Chile
| | - Galia Ramírez-Toloza
- Departamento de Medicina Preventiva Animal, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santa Rosa 11735, La Pintana, Santiago 8820808, Chile; (C.U.-E.); (B.F.-S.); (E.P.-M.); (G.R.-T.)
- Laboratorio Centralizado de Investigación Veterinaria, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santa Rosa 11735, La Pintana, Santiago 8820808, Chile
| | - Mariela Lujan-Tomazic
- Instituto de Patobiología Veterinaria, Instituto Nacional de Tecnologías Agropecuarias, Consejo Nacional de Investigaciones Científicas y Técnicas, Av. de los Reseros y Nicolás Repetto s/n, Hurlingham, Buenos Aires 1686, Argentina; (M.L.-T.); (A.E.R.)
- Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Av. Junín 954, Buenos Aires C1113 AAD, Argentina
| | - Anabel Elisa Rodríguez
- Instituto de Patobiología Veterinaria, Instituto Nacional de Tecnologías Agropecuarias, Consejo Nacional de Investigaciones Científicas y Técnicas, Av. de los Reseros y Nicolás Repetto s/n, Hurlingham, Buenos Aires 1686, Argentina; (M.L.-T.); (A.E.R.)
| | - Raúl Alegría-Morán
- Escuela de Medicina Veterinaria, Sede Santiago, Facultad de Recursos Naturales y Medicina Veterinaria, Universidad Santo Tomás, Ejercito Libertador 146, Santiago 8370003, Chile
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Singh A, Singh M, Malik MA, Padha S. Is There a Shift in Salmonella Diversity Among Poultry in Northern India? Avian Dis 2023; 67:108-113. [PMID: 37140119 DOI: 10.1637/aviandiseases-d-22-00051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Accepted: 01/10/2023] [Indexed: 03/18/2023]
Abstract
The present study was conducted to determine the serotype diversity of Salmonella among poultry in northern India. A total of 101 poultry droppings from 30 farms in the Jammu and Kashmir union territory were analyzed. Nineteen isolates of Salmonella were obtained, and these belonged to four serotypes: Salmonella enterica enterica serotype Kentucky (n = 3), Salmonella enterica enterica serotype Infantis (n = 5), Salmonella enterica enterica serotype Agona (n = 4), and Salmonella enterica enterica serotype Typhimurium (n= 7). The study has isolated some Salmonella serotypes that are infrequently reported in India. Some of the isolated serotypes are reported to be endemic for human nontyphoidal salmonellosis cases in the region. Whether this indicates a shift in the serotype pattern in poultry in the region needs to be investigated further. Nevertheless, the study clearly indicates the risk of foodborne salmonellosis associated with consumption of contaminated poultry and poultry products in the region.
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Affiliation(s)
- Arvinderpal Singh
- Division of Veterinary Public Health and Epidemiology, Faculty of Veterinary Sciences and Animal Husbandry, Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Ranbir Singh Pura, Jammu 181102, India
| | - Maninder Singh
- Division of Veterinary Public Health and Epidemiology, Faculty of Veterinary Sciences and Animal Husbandry, Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Ranbir Singh Pura, Jammu 181102, India
| | - Mohd Ashraf Malik
- Division of Veterinary Public Health and Epidemiology, Faculty of Veterinary Sciences and Animal Husbandry, Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Ranbir Singh Pura, Jammu 181102, India
| | - Sonali Padha
- Division of Veterinary Public Health and Epidemiology, Faculty of Veterinary Sciences and Animal Husbandry, Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Ranbir Singh Pura, Jammu 181102, India
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Greening SS, Gates MC. Cross-sectional survey of barriers and opportunities for engaging backyard poultry producers and veterinarians in addressing poultry health. N Z Vet J 2022; 71:18-26. [PMID: 36189640 DOI: 10.1080/00480169.2022.2128461] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
AIMS To assess the current level of engagement between backyard poultry keepers and veterinarians in New Zealand; to understand the opportunities and barriers for improving access to poultry health care; and to gauge the interest of backyard poultry keepers in participating in a voluntary national poultry health information system. MATERIALS AND METHODS Backyard poultry were defined as any bird species kept for non-commercial purposes. Separate cross-sectional surveys were administered to backyard poultry keepers and veterinarians in New Zealand over 12-week periods starting 22 March 2021 and 03 May 2021 respectively. The veterinarian survey was advertised in the monthly update e-mail from the Veterinary Council of New Zealand, while the survey for backyard poultry keepers was advertised on various online platforms that focus on raising backyard poultry. Results for quantitative variables were reported as basic descriptive statistics, while qualitative free-text responses from open-ended questions were explored using thematic analysis. RESULTS A total of 125 backyard poultry keepers and 35 veterinarians completed the survey. Almost half (56/125; 44.8%) of backyard poultry keepers reported that they had never taken their birds to a veterinarian, with common reasons being difficulty finding a veterinarian, cost of treatment, and perceptions that most visits result in the bird being euthanised. The majority (113/125; 90.4%) of backyard poultry keepers reported that a general internet search was their primary source for poultry health advice. However, it remains unclear if owners were satisfied with the advice found online, as many cited that having access to reliable health information would be an incentive for registering with a poultry health information system. Of the veterinarian responses, 29/35 (82.9%) reported treating an increasing number of poultry in the last 5 years, although many (27/35; 77.1%) suggested they would be hesitant to increase their poultry caseload due to concerns over their lack of knowledge and confidence in poultry medicine; a lack of clinic resources to treat poultry; concerns over the cost-effectiveness of treatments; and a general feeling of helplessness when treating poultry, with most consultations being for end-stage disease and euthanasia. CONCLUSION The results of this study highlight opportunities for increased engagement between backyard poultry keepers and veterinarians, including making available accurate poultry health information and providing veterinarians with improved training in poultry medicine. The results also support the development of a poultry health information system in New Zealand to further enhance health and welfare in backyard poultry populations.
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Affiliation(s)
- S S Greening
- School of Veterinary Science, Massey University, Palmerston North, New Zealand
| | - M C Gates
- School of Veterinary Science, Massey University, Palmerston North, New Zealand
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Larsen KM, DeCicco M, Hood K, Etter AJ. Salmonella enterica frequency in backyard chickens in Vermont and biosecurity knowledge and practices of owners. Front Vet Sci 2022; 9:979548. [PMID: 36213397 PMCID: PMC9536149 DOI: 10.3389/fvets.2022.979548] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 08/16/2022] [Indexed: 11/23/2022] Open
Abstract
The popularity of backyard chickens has been growing steadily over the past 10 years, with Covid-19 stay at home orders in 2020 yielding an added boost in popularity. Concurrently, cases of salmonellosis from live poultry exposure have also risen. Previous research on backyard chicken owners has focused primarily on urban chicken owners, which may have differing knowledge and biosecurity habits from rural backyard chicken owners. The goal of this study was to investigate the prevalence of S. enterica in rural and urban flocks of chickens in the state of Vermont and to determine what attitudes toward and knowledge about S. enterica owners had, as well as what biosecurity practices they used. We conducted two surveys in Vermont between 2019–2022; a pilot study tied to sampling for Salmonella enterica in backyard chicken flocks from 2019–2021 and a statewide study in 2022 to determine the prevalence of backyard chickens in Vermont and obtain representative survey data from backyard chicken owners. We found (i) overall, 19% (8/42) backyard chicken flocks from 2019–2021 had S. enterica, but S. enterica rates varied substantially by year; (ii) backyard chicken owners were wealthier and more educated than the average Vermonter and generally lived in rural areas; (iii) participants in the statewide survey had much lower uptake of good biosecurity habits compared to the pilot survey; (iv) despite increased messaging about backyard chicken-associated salmonellosis and good biosecurity measures over the past several years, uptake of biosecurity measures is inconsistent, and rates of unsafe practices such as kissing or cuddling chickens have increased in Vermont. Overall, the data indicate the need for improved messaging on biosecurity and risks associated with backyard chickens
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Affiliation(s)
- Katalin M. Larsen
- Etter Laboratory, Nutrition and Food Sciences Department, The University of Vermont, Burlington, VT, United States
- Microbiology and Molecular Genetics Department, The University of Vermont, Burlington, VT, United States
| | - Melissa DeCicco
- Etter Laboratory, Nutrition and Food Sciences Department, The University of Vermont, Burlington, VT, United States
| | - Katherine Hood
- Etter Laboratory, Nutrition and Food Sciences Department, The University of Vermont, Burlington, VT, United States
- Microbiology and Molecular Genetics Department, The University of Vermont, Burlington, VT, United States
| | - Andrea J. Etter
- Etter Laboratory, Nutrition and Food Sciences Department, The University of Vermont, Burlington, VT, United States
- *Correspondence: Andrea J. Etter
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Backyard poultry flocks in France: A diversity of owners and biosecurity practices. Prev Vet Med 2021; 197:105511. [PMID: 34710712 DOI: 10.1016/j.prevetmed.2021.105511] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 09/30/2021] [Accepted: 10/18/2021] [Indexed: 11/21/2022]
Abstract
Over the past few years, the number of backyard poultry flocks has been increasing in France. A mandatory step to improve backyard poultry management is to assess health risks by characterizing the flocks and understanding the owners' motivations for keeping poultry and their husbandry practices. A survey of backyard poultry owners was conducted in France to gather information about their motivations for owning poultry, flock characteristics, and breeding and biosecurity practices. The survey was completed by 1,160 owners. The major motivations for owning poultry flocks were egg consumption (93.3 %), recycling (72.4 %) and having pet animals (53.2 %). Most owners had already heard about avian influenza (96.7 %), but were less aware about other diseases such as Newcastle Disease (41.6 %), salmonellosis (79.1 %), or campylobacteriosis (18.6 %). Owners mainly kept only egg-layers (78.4 %), and the median size flock was five egg-layers. Owners gave eggs to their relatives, occasionally or regularly, in 86.6 % of the cases. Contacts with other family poultry owners were frequent (68.9 %) and biosecurity practices were poorly implemented: 50 % of owners did not wash their hands systematically after visiting the flock and more than 60 % of owners did not wear specific shoes. Drawing from the survey data, five profiles of family poultry flocks were identified with multiple correspondence analysis and hierarchical cluster analysis. The profiles, based on flock characteristics and owners' practices and motivations, illustrate the heterogeneity of the backyard poultry sector: 1) urban poultry, 2) traditional poultry, 3) student poultry, 4) pet poultry and 5) hobby poultry. Urban poultry consisted of recently constituted (< 2 years old), small (< 3 birds) flocks of layers, and traditional poultry of older, medium-sized flocks belonging to retired and older people. These two profiles were characterized by limited contacts (direct or indirect) with other flocks and owners. Student poultry consisted of younger owners (<30 years old) with flocks over 5 years old. Pet poultry consisted of recently established, medium-size flocks of layers located in both rural or urban environments. Hobby poultry consisted of dedicated owners who breed and sell poultry and participate in exhibitions and poultry shows. Pet and hobby poultry profiles were characterized by greater knowledge of diseases and biosecurity practices, more bird movements, and reported more frequent clinical signs. The observation of different profiles can help target veterinary and public health education messages to prevent disease transmission in backyard poultry flocks in France.
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Pavez-Muñoz E, Fernández-Sanhueza B, Urzúa-Encina C, Galarce N, Alegría-Morán R. Risk Factors for Positivity to Shiga Toxin-Producing Escherichia coli and Salmonella enterica in Backyard Production Systems Animals from Metropolitana Region, Chile: A Threat to Public Health? INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:10730. [PMID: 34682504 PMCID: PMC8535594 DOI: 10.3390/ijerph182010730] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 10/11/2021] [Accepted: 10/11/2021] [Indexed: 12/29/2022]
Abstract
In the Metropolitana region of Chile there are 3836 backyard production systems (BPS), characterized as small-scale systems. They act as a source of zoonotic pathogens, such as Salmonella enterica and Shiga toxin-producing Escherichia coli (STEC), whose prevalence in BPS has not been fully described. The objective of this study was to determine the positivity for both agents in BPS and to establish the risk factors related to their presence. In each BPS, an epidemiological survey was undertaken, and stool samples were collected to detect these pathogens via bacteriological culture and conventional PCR techniques. Subsequently, multivariable logistic regression models were applied to establish the risk factors associated with their presence. BPS positivity rates of 11.76% for STEC and 4.7% for S. enterica were observed. The systems showed poor welfare standards and a lack of biosecurity measures. The risk factor analysis concluded that the Gini-Simpson index (p = 0.030; OR = 1.717) and the presence of neighboring intensive poultry or swine production systems (p = 0.019; OR = 20.645) act as factors that increased the risk of positivity with respect to STEC. In the case of S. enterica, exchanging embryonated eggs (p = 0.021; OR = 39) and the presence of debeaked chickens (p = 0.001; OR = 156) were determined as factors that increased the risk of positivity for this agent. For positivity with respect to both pathogens, the Gini-Simpson index (p = 0.030; OR = 1.544) and being INDAP/PRODESAL users (p = 0.023; OR = 15.026) were determined as factors that increased the risk, whereas the type of confinement (p = 0.002; OR = 0.019) decreased it. Epidemiological surveillance of these neglected populations is lacking, highlighting the fact that STEC and S. enterica maintenance on BPS represents a potential threat to public health.
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Affiliation(s)
- Erika Pavez-Muñoz
- Departamento de Medicina Preventiva Animal, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santiago 8820808, Chile; (E.P.-M.); (B.F.-S.); (C.U.-E.); (N.G.)
- Central Veterinary Research Laboratory, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santiago 8820808, Chile
| | - Bastián Fernández-Sanhueza
- Departamento de Medicina Preventiva Animal, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santiago 8820808, Chile; (E.P.-M.); (B.F.-S.); (C.U.-E.); (N.G.)
- Central Veterinary Research Laboratory, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santiago 8820808, Chile
| | - Constanza Urzúa-Encina
- Departamento de Medicina Preventiva Animal, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santiago 8820808, Chile; (E.P.-M.); (B.F.-S.); (C.U.-E.); (N.G.)
- Central Veterinary Research Laboratory, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santiago 8820808, Chile
| | - Nicolás Galarce
- Departamento de Medicina Preventiva Animal, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santiago 8820808, Chile; (E.P.-M.); (B.F.-S.); (C.U.-E.); (N.G.)
| | - Raúl Alegría-Morán
- Central Veterinary Research Laboratory, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santiago 8820808, Chile
- Facultad de Ciencias Agropecuarias y Ambientales, Universidad del Alba, Santiago 8370007, Chile
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10
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Keerthirathne TP, Ross K, Fallowfield H, Whiley H. Examination of Australian backyard poultry for Salmonella, Campylobacter and Shigella spp., and related risk factors. Zoonoses Public Health 2021; 69:13-22. [PMID: 34482641 DOI: 10.1111/zph.12889] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 07/18/2021] [Accepted: 08/05/2021] [Indexed: 11/30/2022]
Abstract
Worldwide, foodborne illness is a significant public health issue in both developed and developing countries. Salmonellosis, campylobacteriosis and shigellosis are common foodborne gastrointestinal illnesses caused by the bacteria Salmonella spp., Campylobacter spp. and Shigella spp. respectively. These zoonotic diseases are frequently linked to eggs and poultry products. The aim of this study was to investigate the presence of these pathogens in Australian backyard poultry flocks and to determine risk factors for these pathogens. Poultry faeces samples were collected from 82 backyards and screened for Salmonella spp., Campylobacter spp. and Shigella spp. using qPCR. A questionnaire was administered to the backyard poultry owners to assess their knowledge regarding management of poultry and eggs and to identify potential risk factors that may contribute to the presence of zoonotic pathogens in the flocks. One composite faecal sample was collected from each backyard (82 samples). Composite sampling here means taking one or more grab samples from a backyard to make up approximately 10 grams. Four per cent of samples, that is 4% backyards tested, were positive for Salmonella spp., 10% were positive for Campylobacter spp. and none were positive for Shigella spp. A higher infection rate was seen in multi-aged flocks (24%) compared with the single-aged flocks (3%). The survey found that many participants were engaging in risky food safety behaviours with 46% of participants responding that they washed their eggs with running water or still water instead of wiping the dirt off with a damp cloth to clean the eggs and 19% stored their eggs at room temperature. This study demonstrated that backyard poultry may pose a potential risk for salmonellosis and campylobacteriosis. Additionally, Australian public health and food safety regulations should be modified and effectively implemented to address the risks associated with backyard poultry husbandry.
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Affiliation(s)
| | - Kirstin Ross
- Environmental Health, College of Science and Engineering, Flinders University, Adelaide, SA, Australia
| | - Howard Fallowfield
- Environmental Health, College of Science and Engineering, Flinders University, Adelaide, SA, Australia
| | - Harriet Whiley
- Environmental Health, College of Science and Engineering, Flinders University, Adelaide, SA, Australia
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11
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Sodagari HR, Sahibzada S, Robertson I, Habib I, Wang P. Whole-Genome Comparative Analysis Reveals Association Between Salmonella Genomic Variation and Egg Production Systems. Front Vet Sci 2021; 8:666767. [PMID: 34322531 PMCID: PMC8311177 DOI: 10.3389/fvets.2021.666767] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Accepted: 06/08/2021] [Indexed: 11/13/2022] Open
Abstract
Non-typhoidal Salmonella, particularly Salmonella enterica serovar Typhimurium (S. Typhimurium), is the predominant endemic serovar in the Australian egg production industry and is one of the most frequently reported serovars in foodborne infections in Australia. This study was conducted to investigate the genomic characteristics of Salmonella isolated from retail table eggs in Western Australia and to identify the impact of production systems on genomic characteristics of Salmonella such as virulence and antimicrobial resistance. A total of 40 non-typhoidal Salmonella isolates [S. Typhimurium isolates (n = 28) and Salmonella Infantis isolates (n = 12)] sourced from retail eggs produced by different production systems (barn-laid, cage, and free-range) in Western Australia were sequenced by whole-genome sequencing. The isolates were de novo assembled, annotated, and analyzed. The results indicated an association between Salmonella genomic variation and the system used to raise poultry for egg production (p-value < 0.05). All but one of the S. Infantis isolates were recovered from eggs collected from poultry raised under barn and cage production systems. A higher proportion (83.3%) of S. Typhimurium isolates were recovered from the eggs produced by free-range production system as compared with those produced under barn (76.9%) and cage production systems (53.3%). Our analysis indicated that Salmonella isolated from the eggs produced by barn and cage production systems had more virulence genes than the isolates of the free-range produced eggs. A low carriage of antimicrobial-resistant gene was detected in the isolates of this study. We have built a Salmonella genomics database and characteristics-linked gene pools to facilitate future study, characterization, and tracing of Salmonella outbreaks.
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Affiliation(s)
- Hamid Reza Sodagari
- School of Veterinary Medicine, College of Science, Health, Engineering and Education, Murdoch University, Murdoch, WA, Australia
| | - Shafi Sahibzada
- School of Veterinary Medicine, College of Science, Health, Engineering and Education, Murdoch University, Murdoch, WA, Australia
| | - Ian Robertson
- School of Veterinary Medicine, College of Science, Health, Engineering and Education, Murdoch University, Murdoch, WA, Australia
| | - Ihab Habib
- School of Veterinary Medicine, College of Science, Health, Engineering and Education, Murdoch University, Murdoch, WA, Australia
- Department of Veterinary Medicine, College of Food and Agriculture, United Arab Emirates University, Al Ain, United Arab Emirates
| | - Penghao Wang
- Medical, Molecular and Forensic Sciences, College of Science, Health, Engineering and Education, Murdoch University, Murdoch, WA, Australia
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12
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Mokgophi TM, Gcebe N, Fasina F, Jambwa K, Adesiyun AA. Prevalence, Serovars, and Factors Associated with Salmonella Contamination of Chicken Carcasses Sold in Outlets of the Informal Market in Gauteng Province, South Africa. J Food Prot 2021; 84:991-999. [PMID: 33428739 DOI: 10.4315/jfp-20-416] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Accepted: 01/05/2021] [Indexed: 02/05/2023]
Abstract
ABSTRACT Salmonella has been linked to many foodborne illnesses and epidemics in both humans and animals. This cross-sectional study determined the prevalence, serovars, and factors associated with Salmonella contamination of chickens slaughtered in informal market outlets in Gauteng Province, South Africa. A total of 151 chicken carcasses were randomly collected from 47 outlets. Standard bacteriological and molecular methods were used to isolate, identify, and determine the serovar of Salmonella isolates. The prevalence of Salmonella in carcass swabs, cloacal swabs, and carcass drips was 29.1% (44 of 151), 27.2% (41 of 151), and 43.7% (66 of 151), respectively, and the differences were statistically significant (P = 0.004). Only 5 (township locations of outlet, throughput, carcass evisceration, location of carcass for sale, and outlet sanitation) of 10 factors investigated for the contamination of carcasses by Salmonella were statistically significantly (P < 0.05) associated with the isolation of Salmonella. Of the 268 isolates of Salmonella, 157 (58.6%) were typeable using a limited molecular PCR technique, and nine serovars were identified. The predominant Salmonella enterica serovars were Bovismorbificans (31.0%), Enteritidis (7.5%), and Hadar (6.7%). The five important factors found to be significantly associated with the isolation of Salmonella at these outlets offer opportunities for the reduction of Salmonella contamination. There is a need for further investigation of the probable causes of the predominant isolation of Salmonella serovar Bovismorbificans in chickens and its potential implications for human infections in South Africa. It is concluded that chickens purchased from the informal market in Gauteng Province can be a source for salmonellosis in humans if improperly cooked before consumption.
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Affiliation(s)
- Thelma M Mokgophi
- Department of Production Animal Studies, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa
| | - Nomakorinte Gcebe
- Bacteriology Department, Onderstepoort Veterinary Research, Agricultural Research Council, South Africa
| | - Folorunso Fasina
- Department of Veterinary Tropical Diseases, Faculty of Veterinary Sciences, University of Pretoria, South Africa
- Emergency Center for Transboundary Animal Diseases, Food and Agriculture Organization, Dar es Salaam, Tanzania
| | - Kudakhwashe Jambwa
- Bacteriology Department, Onderstepoort Veterinary Research, Agricultural Research Council, South Africa
| | - Abiodun A Adesiyun
- Department of Production Animal Studies, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, South Africa
- Department of Basic Veterinary Sciences, Sciences, School of Veterinary Medicine, The University of West Indies, St. Augustine, Trinidad and Tobago
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13
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Cardoso MJ, Nicolau AI, Borda D, Nielsen L, Maia RL, Møretrø T, Ferreira V, Knøchel S, Langsrud S, Teixeira P. Salmonella in eggs: From shopping to consumption-A review providing an evidence-based analysis of risk factors. Compr Rev Food Sci Food Saf 2021; 20:2716-2741. [PMID: 33960652 DOI: 10.1111/1541-4337.12753] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Revised: 02/20/2021] [Accepted: 03/16/2021] [Indexed: 11/28/2022]
Abstract
Nontyphoidal salmonellae are among the most prevalent foodborne pathogens causing gastrointestinal infections worldwide. A high number of cases and outbreaks of salmonellosis are associated with the consumption of eggs and egg products, and several of these occur at the household level. The aim of the current study is to critically evaluate the current status of knowledge on Salmonella in eggs from a consumer's perspective, analyzing the hazard occurrence and the good practices that should be applied to reduce salmonellosis risk. Following a HACCP (Hazard Analysis and Critical Control Point) based approach, some steps along the food journey were identified as Critical Consumer Handling (CCH)-steps in which consumers, through their behavior or choice, can significantly reduce the level of Salmonella in eggs and egg products. From shopping/collecting to consumption, each of these steps is discussed in this review to provide an evidence-based overview of risk factors of human salmonellosis related to egg consumption. The main message to consumers is to choose Salmonella-free eggs (those that some official entity or producer guarantees that does not contain Salmonella), when available, especially for dishes that are not fully heat treated. Second, as guaranteed Salmonella-free eggs are only available in a few countries, refrigerated storage from the point of collection and proper cooking will significantly reduce the risk of salmonellosis. This will require a revision of the actual recommendations/regulations, as not all ensure that eggs are maintained at temperatures that prevent growth of Salmonella from collection until the time of purchasing.
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Affiliation(s)
- Maria João Cardoso
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Porto, Portugal
| | - Anca Ioana Nicolau
- Faculty of Food Science and Engineering, Dunarea de Jos University of Galati, Galati, Romania
| | - Daniela Borda
- Faculty of Food Science and Engineering, Dunarea de Jos University of Galati, Galati, Romania
| | - Line Nielsen
- Department of Food Science, University of Copenhagen, Copenhagen, Denmark
| | - Rui Leandro Maia
- UFP Energy, Environment and Health Research Unit (FP-ENAS), University Fernando Pessoa, Porto, Portugal
| | - Trond Møretrø
- Norwegian Institute of Food, Fisheries and Aquaculture Research, Ås, Norway
| | - Vânia Ferreira
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Porto, Portugal
| | - Susanne Knøchel
- Department of Food Science, University of Copenhagen, Copenhagen, Denmark
| | - Solveig Langsrud
- Norwegian Institute of Food, Fisheries and Aquaculture Research, Ås, Norway
| | - Paula Teixeira
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Porto, Portugal
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14
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Pavez-Muñoz E, González C, Fernández-Sanhueza B, Sánchez F, Escobar B, Ramos R, Fuenzalida V, Galarce N, Arriagada G, Neira V, Muñoz-Aguayo J, Flores-Figueroa C, Johnson TJ, Alegría-Morán R. Antimicrobial Usage Factors and Resistance Profiles of Shiga Toxin-Producing Escherichia coli in Backyard Production Systems From Central Chile. Front Vet Sci 2021; 7:595149. [PMID: 33521079 PMCID: PMC7844202 DOI: 10.3389/fvets.2020.595149] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Accepted: 12/17/2020] [Indexed: 12/28/2022] Open
Abstract
Shiga toxin-producing Escherichia coli (STEC) is a zoonotic pathogen and important cause of foodborne disease worldwide. Many animal species in backyard production systems (BPS) harbor STEC, systems characterized by low biosecurity and technification. No information is reported on STEC circulation, antimicrobial resistance (AMR) and potential drivers of antimicrobial usage in Chilean BPS, increasing the risk of maintenance and transmission of zoonotic pathogens and AMR generation. Thus, the aim of this study was to characterize phenotypic and genotypic AMR and to study the epidemiology of STEC isolated in BPS from Metropolitana region, Chile. A total of 85 BPS were sampled. Minimal inhibitory concentration and whole genome sequencing was assessed in 10 STEC strain isolated from BPS. All strains were cephalexin-resistant (100%, n = 10), and five strains were resistant to chloramphenicol (50%). The most frequent serotype was O113:H21 (40%), followed by O76:H19 (40%), O91:H14 (10%), and O130:H11 (10%). The stx1 type was detected in all isolated strains, while stx2 was only detected in two strains. The Stx subtype most frequently detected was stx1c (80%), followed by stx1a (20%), stx2b (10%), and stx2d (10%). All strains harbored chromosomal blaAmpC. Principal component analysis shows that BPS size, number of cattle, pet and horse, and elevation act as driver of antimicrobial usage. Logistic multivariable regression shows that recognition of diseases in animals (p = 0.038; OR = 9.382; 95% CI: 1.138–77.345), neighboring poultry and/or swine BPS (p = 0.006; OR = 10.564; 95% CI: 1.996–55.894), visit of Veterinary Officials (p = 0.010; OR = 76.178; 95% CI: 2.860–2029.315) and close contact between animal species in the BPS (p = 0.021; OR = 9.030; 95% CI: 1.385–58.888) increase significantly the risk of antimicrobial use in BPS. This is the first evidence of STEC strains circulating in BPS in Chile, exhibiting phenotypic AMR, representing a threat for animal and public health. Additionally, we identified factors acting as drivers for antimicrobial usage in BPS, highlighting the importance of integration of these populations into surveillance and education programs to tackle the potential development of antimicrobial resistance and therefore the risk for ecosystemic health.
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Affiliation(s)
- Erika Pavez-Muñoz
- Departamento de Medicina Preventiva Animal, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santiago, Chile
| | - Camilo González
- Departamento de Medicina Preventiva Animal, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santiago, Chile
| | - Bastián Fernández-Sanhueza
- Departamento de Medicina Preventiva Animal, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santiago, Chile
| | - Fernando Sánchez
- Departamento de Medicina Preventiva Animal, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santiago, Chile
| | - Beatriz Escobar
- Departamento de Medicina Preventiva Animal, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santiago, Chile
| | - Romina Ramos
- Departamento de Medicina Preventiva Animal, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santiago, Chile
| | - Verónica Fuenzalida
- Departamento de Medicina Preventiva Animal, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santiago, Chile
| | - Nicolás Galarce
- Departamento de Medicina Preventiva Animal, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santiago, Chile
| | - Gabriel Arriagada
- Instituto de Ciencias Agroalimentarias, Animales y Ambientales-ICA3, Universidad de O'Higgins, Rancagua, Chile
| | - Víctor Neira
- Departamento de Medicina Preventiva Animal, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santiago, Chile
| | - Jeannette Muñoz-Aguayo
- Mid-Central Research and Outreach Center, University of Minnesota, Saint Paul, MN, United States
| | - Cristian Flores-Figueroa
- Mid-Central Research and Outreach Center, University of Minnesota, Saint Paul, MN, United States
| | - Timothy J Johnson
- Department of Veterinary and Biomedical Sciences, University of Minnesota, Saint Paul, MN, United States
| | - Raúl Alegría-Morán
- Departamento de Medicina Preventiva Animal, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santiago, Chile.,Facultad de Ciencias Agropecuarias y Ambientales, Universidad Pedro de Valdivia, Santiago, Chile
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15
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High genetic similarity of Salmonella Enteritidis as a predominant serovar by an independent survey in 3 large-scale chicken farms in China. Poult Sci 2021; 100:100941. [PMID: 33607315 PMCID: PMC7900599 DOI: 10.1016/j.psj.2020.12.038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 12/11/2020] [Accepted: 12/15/2020] [Indexed: 11/27/2022] Open
Abstract
Salmonella Enteritidis (SE) are important zoonotic pathogens, and can be easily transferred to humans by contaminated animal products. Epidemic surveys of SE are necessary in current modern large-scale chicken farms. In this study, Salmonella strains were isolated from possibly infected samples collected at 3 independent farms, and their serotype, drug resistances, virulence genes, and genetic similarity were analyzed by molecular genetic analysis technologies including multilocus sequence typing (MLST), clustered regularly interspaced short palindromic repeats (CRISPR), pulsed-field gel electrophoresis (PFGE), and whole-genome sequencing (WGS). A total of 346 Salmonella strains were isolated from 3,598 samples (9.61%); 329 isolates were identified as SE (95.09%) and 308 isolates were multidrug resistant (93.62%). Virulotyping based on 6 virulence genes showed high similarity in SE isolates of each farm, with the exception of 2 isolates. All SE isolates were found to be the same ST11 type by MLST, and 22 strains of 150 SE isolates selected at random were found to belong to 1 cluster by PFGE and the same SET1 type by CRISPR. WGS results further revealed that these isolates belonged to the same clonal cluster, with high genetic similarity of 99.80 to 100.00%. All these results indicated that these SE isolates were overwhelmingly dominant and demonstrated high genetic similarity, which revealed that the same SE clone might be transmitted in these farms.
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16
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Mohammed Jajere S, Hassan L, Zakaria Z, Abu J, Abdul Aziz S. Antibiogram Profiles and Risk Factors for Multidrug Resistance of Salmonella enterica Recovered from Village Chickens ( Gallus gallus domesticus Linnaeus) and Other Environmental Sources in the Central and Southern Peninsular Malaysia. Antibiotics (Basel) 2020; 9:E701. [PMID: 33076451 PMCID: PMC7602575 DOI: 10.3390/antibiotics9100701] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 10/02/2020] [Accepted: 10/08/2020] [Indexed: 12/18/2022] Open
Abstract
The emergence of multidrug resistance (MDR), including colistin resistance, among Enterobacteriaceae recovered from food animals poses a serious public health threat because of the potential transmission of these resistant variants to humans along the food chain. Village chickens or Ayam Kampung are free-range birds and are preferred by a growing number of consumers who consider these chickens to be organic and more wholesome. The current study investigates the antibiogram profiles of Salmonella isolates recovered from village chicken flocks in South-central Peninsular Malaysia. A total of 34 isolates belonging to eight serotypes isolated from village chickens were screened for resistance towards antimicrobials including colistin according to the WHO and OIE recommendations of critical antibiotics. S. Weltevreden accounted for 20.6% of total isolates, followed by serovars Typhimurium and Agona (17.6%). The majority of isolates (73.5%) demonstrated resistance to one or more antimicrobials. Eight isolates (23.5%) were resistant to ≥3 antimicrobial classes. Colistin resistance (minimum inhibitory concentrations: 4-16 mg/L) was detected among five isolates (14.7%), including S. Weltevreden, S. Albany, S. Typhimurium, and Salmonella spp. Univariable analysis of risk factors likely to influence the occurrence of MDR Salmonella revealed that the flock size, poultry production system, and use of antibiotics in the farm were not significantly (p > 0.05) associated with MDR Salmonella. The current study highlights that MDR Salmonella occur at a lower level in village chickens compared to that found in live commercial chickens. However, MDR remains a problem even among free-range chickens with minimal exposure to antibiotics.
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Affiliation(s)
| | - Latiffah Hassan
- Faculty of Veterinary Medicine, Universiti Putra Malaysia, Serdang, Selangor 43400 UPM, Malaysia; (S.M.J.); (Z.Z.); (J.A.); (S.A.A.)
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17
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Sodagari HR, Wang P, Robertson I, Habib I, Sahibzada S. Non-Typhoidal Salmonella at the Human-Food-of-Animal-Origin Interface in Australia. Animals (Basel) 2020; 10:E1192. [PMID: 32674371 PMCID: PMC7401514 DOI: 10.3390/ani10071192] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 07/08/2020] [Indexed: 12/20/2022] Open
Abstract
Non-typhoidal Salmonella is a major zoonotic pathogen that plays a significant role in foodborne human salmonellosis worldwide through the consumption of contaminated foods, particularly those of animal origin. Despite a considerable reduction in human salmonellosis outbreaks in developed countries, Australia is experiencing a continuous rise of such outbreaks in humans. This review of the literature highlights the reported non-typhoidal Salmonella outbreaks in humans as well as the occurrence of the pathogen in foods from animal sources throughout Australia. Non-typhoidal Salmonella infections from food animals are more often associated with at-risk people, such as immunocompromised and aged people or children. Although several animal-sourced foods were recognised as the catalysts for salmonellosis outbreaks in Australia, egg and egg-based products remained the most implicated foods in the reported outbreaks. This review further highlights the antimicrobial resistance trends of non-typhoidal Salmonella isolates at the human-food interface, with a focus on clinically important antimicrobials in humans, by collating evidence from previous investigations in Australia. The rise in antimicrobial-resistant Salmonella, especially to antimicrobials commonly prescribed to treat human salmonellosis, has become a significant global public health concern. However, the overall prevalence of antimicrobial resistance in Australia is considerably lower than in other parts of the world, particularly in terms of critically important antimicrobials for the treatment of human salmonellosis. The present review adds to our understanding of the global epidemiology of non-typhoidal Salmonella with emphasis on the past few decades in Australia.
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Affiliation(s)
- Hamid Reza Sodagari
- School of Veterinary Medicine, College of Science, Health, Education and Engineering, Murdoch University, Perth 6150, Australia; (H.R.S.); (P.W.); (I.R.)
| | - Penghao Wang
- School of Veterinary Medicine, College of Science, Health, Education and Engineering, Murdoch University, Perth 6150, Australia; (H.R.S.); (P.W.); (I.R.)
| | - Ian Robertson
- School of Veterinary Medicine, College of Science, Health, Education and Engineering, Murdoch University, Perth 6150, Australia; (H.R.S.); (P.W.); (I.R.)
| | - Ihab Habib
- School of Veterinary Medicine, College of Science, Health, Education and Engineering, Murdoch University, Perth 6150, Australia; (H.R.S.); (P.W.); (I.R.)
- Veterinary Medicine Department, College of Food and Agriculture, United Arab Emirates University (UAEU), Al Ain P.O. Box 1555, UAE
| | - Shafi Sahibzada
- School of Veterinary Medicine, College of Science, Health, Education and Engineering, Murdoch University, Perth 6150, Australia; (H.R.S.); (P.W.); (I.R.)
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18
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Occurrence of Salmonella spp. in eggs from backyard chicken flocks in Portugal and Romania - Results of a preliminary study. Food Control 2020. [DOI: 10.1016/j.foodcont.2020.107180] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Jajere SM, Hassan L, Abdul Aziz S, Zakaria Z, Abu J, Nordin F, Faiz NM. Salmonella in native "village" chickens (Gallus domesticus): prevalence and risk factors from farms in South-Central Peninsular Malaysia. Poult Sci 2020; 98:5961-5970. [PMID: 31392329 PMCID: PMC6771764 DOI: 10.3382/ps/pez392] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Accepted: 06/20/2019] [Indexed: 12/31/2022] Open
Abstract
Village chicken or Ayam Kampung, common to Southeast Asian countries, has always been regarded as superior in comparison to commercial broiler chicken in terms of wholesomeness and health benefits. The current study investigates the prevalence and risk factors of Salmonella among village chicken flocks from the central and southern states of Peninsular Malaysia. A total of 35 village flocks were sampled from Selangor (n = 19), Melaka (n = 10), Johor (n = 4), and Negeri Sembilan (n = 2). In total, 1,042 samples were collected; these included cloacal swabs (n = 675), eggs (n = 62), pooled drinking water (n = 175), pooled feeds (n = 70), and pooled flies (n = 60). Isolation of Salmonella from cloacal swabs, poultry drinking water, and feeds was carried out according to the protocols and recommendations of the World Organization for Animal Health (OIE) terrestrial manual. The prevalence of Salmonella at an individual bird-level was 2.5% (17/675, 95% CI: 1.6 to 4.0). All eggs screened were negative; in the case of environmental samples, however, Salmonella was detected in 5.14% (9/175), 7.14% (5/70), and 5.0% (3/60) for water, feed, and flies, respectively. A total of 34 isolates and 8 Salmonella serotypes were identified. Weltevreden (20.6%) was the most common, followed by Typhimurium and Agona (17.6%), Albany and Enteritidis (8.8%), Molade (5.9%), Corvallis and Schleissheim (2.9%), and others grouped as Salmonella spp. (11.8%). Multivariable logistic regression models revealed that Salmonella positivity among flocks could be strongly predicted by storage of feeds (uncovered feeds; OR = 10.38; 95% CI: 1.25 to 86.39; p = 0.030) and uncovered water tanks (uncovered tank; OR = 6.43; 95% CI: 1.02 to 40.60; p = 0.048). The presence of Salmonella in village chickens in the study area was lower than that of commercial chickens in Malaysia.
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Affiliation(s)
- Saleh Mohammed Jajere
- Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia
| | - Latiffah Hassan
- Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia
| | - Saleha Abdul Aziz
- Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia
| | - Zunita Zakaria
- Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia
| | - Jalila Abu
- Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia
| | - Fauziah Nordin
- Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia
| | - Nik M Faiz
- Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia
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Mthembu TP, Zishiri OT, El Zowalaty ME. Detection and Molecular Identification of Salmonella Virulence Genes in Livestock Production Systems in South Africa. Pathogens 2019; 8:pathogens8030124. [PMID: 31405078 PMCID: PMC6789496 DOI: 10.3390/pathogens8030124] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2019] [Revised: 07/26/2019] [Accepted: 08/05/2019] [Indexed: 01/07/2023] Open
Abstract
Livestock are an important source of protein and food for humans, however opportunistic pathogens such as Salmonella spp. turn livestock into vehicles of foodborne diseases. This study investigated the prevalence of virulence genes in Salmonella spp. isolated from livestock production systems in two provinces of South Africa. During the period from May to August, 2018, a total of 361 faecal (189), oral (100), environmental (soil (36) and water (27)) and feed (9) samples were randomly collected from different animals (cattle, sheep, goats, pigs, ducks and chickens) that were housed in small-scale livestock production systems from Eastern Cape and KwaZulu-Natal Provinces in South Africa. Salmonella spp. were isolated and identified using microbiological and DNA molecular methods. Salmonella spp. were present in 29.0% of the samples of which 30.2% belonged to the Salmonella enterica species as confirmed by the positive amplification of the species specific iroB gene. Virulence genes that were screened from livestock-associated Salmonella were invA, iroB, spiC, pipD and int1. Statistically significant associations (p < 0.05) were established between the virulence genes, sampling location, animal host as well as the season when samples were collected. Furthermore, statistically significant (p < 0.05) positive correlations were observed between most of the virulence genes investigated. This is one of the recent studies to detect and investigate livestock-associated Salmonella spp. in South Africa. This study highlights the importance of continuous monitoring and surveillance for pathogenic salmonellae. It also demonstrated the detection and prevalence of virulent Salmonella spp. harbored by livestock in South Africa. This study demonstrated the potential risks of pathogenic Salmonella enterica to cause foodborne diseases and zoonotic infections from farm-to-fork continuum using the global one-health approach.
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Affiliation(s)
- Thobeka P Mthembu
- Discipline of Genetics, School of Life Sciences, University of KwaZulu-Natal, Private Bag X54001, Durban 4000, South Africa
| | - Oliver T Zishiri
- Discipline of Genetics, School of Life Sciences, University of KwaZulu-Natal, Private Bag X54001, Durban 4000, South Africa
| | - Mohamed E El Zowalaty
- Virology and Microbiology Research Group, College of Pharmacy City University College of Ajman, Al Tallah 2, Ajman, P.O. Box 18484, UAE.
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21
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Toro M, Rivera D, Toledo V, Campos-Vargas R, Allard MW, Hamilton-West C, Moreno-Switt AI. Genomics of Salmonella contaminating backyard production systems reveals persistence and transmission of genetically related Salmonella on a farm basis. Zoonoses Public Health 2018; 65:1008-1014. [PMID: 30264433 DOI: 10.1111/zph.12526] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 08/10/2018] [Accepted: 09/03/2018] [Indexed: 11/29/2022]
Abstract
Animals raised in backyard productive systems (BPS) have been frequently associated with Salmonella outbreaks. Several serovars have caused these events, showing that different BPSs can be contaminated by distinct Salmonella serovars. The aim of this study was to characterize the genomic diversity of Salmonella isolates obtained from BPSs in Central Chile to understand their genomic relatedness. A whole-genome SNP-based phylogenetic analysis of 22 Salmonella isolates from 12 locations revealed that S. Typhimurium isolates clustered based on the BPS that they were originally isolated from, and the same was established for S. Enteritidis isolates. Furthermore, our genomic analysis shows that animals from different species (i.e., a chicken, a duck and a pig) carried genetically related S. Typhimurium strains within the same BPS. Moreover, some of these genetically related isolates were obtained in different years (2013 and 2014), indicating that farm-specific Salmonella can persist in BPSs for multiple years and that interspecies transmission is plausible in this environment. Understanding the dynamics of interspecies transmission of Salmonella serovars within a contaminated BPS is fundamental to the design of mitigation strategies to reduce outbreaks of human Salmonella associated with backyard production systems.
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Affiliation(s)
- Magaly Toro
- Instituto de Nutrición y Tecnología de los Alimentos, Universidad de Chile, Santiago, Chile
| | - Dácil Rivera
- Escuela de Medicina Veterinaria, Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile
| | - Viviana Toledo
- Escuela de Medicina Veterinaria, Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile
| | - Reinaldo Campos-Vargas
- Centro de Biotecnología Vegetal, Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile
| | - Marc W Allard
- U.S. Food and Drug Administration, Center for Food Safety and Applied Nutrition, College Park, Maryland
| | - Christopher Hamilton-West
- Departamento de Medicina Preventiva, Facultad de Ciencias Veterinarias y Pecuarias, Universidad de Chile, Santiago, Chile
| | - Andrea I Moreno-Switt
- Escuela de Medicina Veterinaria, Facultad de Ciencias de la Vida, Universidad Andres Bello, Santiago, Chile.,Millennium Nucleus on Interdisciplinary Approach to Antimicrobial Resistance, Santiago, Chile
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22
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Mehdi Y, Létourneau-Montminy MP, Gaucher ML, Chorfi Y, Suresh G, Rouissi T, Brar SK, Côté C, Ramirez AA, Godbout S. Use of antibiotics in broiler production: Global impacts and alternatives. ANIMAL NUTRITION (ZHONGGUO XU MU SHOU YI XUE HUI) 2018; 4:170-178. [PMID: 30140756 PMCID: PMC6103476 DOI: 10.1016/j.aninu.2018.03.002] [Citation(s) in RCA: 264] [Impact Index Per Article: 44.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Revised: 03/16/2018] [Accepted: 03/19/2018] [Indexed: 01/12/2023]
Abstract
Antibiotics are used to fight bacterial infections. However, a selective pressure gave rise to bacteria resistant to antibiotics. This leaves scientists worried about the danger to human and animal health. Some strategies can be borrowed to reduce the use of antibiotics in chicken farms. Much research has been carried out to look for natural agents with similar beneficial effects of growth promoters. The aim of these alternatives is to maintain a low mortality rate, a good level of animal yield while preserving environment and consumer health. Among these, the most popular are probiotics, prebiotics, enzymes, organic acids, immunostimulants, bacteriocins, bacteriophages, phytogenic feed additives, phytoncides, nanoparticles and essential oils.
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Affiliation(s)
- Youcef Mehdi
- Université Laval, Faculté des sciences de l'agriculture et de l'alimentation, 2425 rue de l'Agriculture, local 4145 (Qc), Québec G1V 0A6, Canada
- Institut de Recherche et de Développement en Agroenvironnement, 2700 rue Einstein-Québec, Québec G1P 3W8, Canada
| | - Marie-Pierre Létourneau-Montminy
- Université Laval, Faculté des sciences de l'agriculture et de l'alimentation, 2425 rue de l'Agriculture, local 4145 (Qc), Québec G1V 0A6, Canada
| | - Marie-Lou Gaucher
- Université de Montréal, Faculté de Médecine Vétérinaire, 3200 rue Sicotte, Saint-Hyacinthe, Québec J2S 2M2, Canada
| | - Younes Chorfi
- Université de Montréal, Faculté de Médecine Vétérinaire, 3200 rue Sicotte, Saint-Hyacinthe, Québec J2S 2M2, Canada
| | - Gayatri Suresh
- Institut National de Recherche Scientifique, 490 de la Couronne (Qc), Québec G1K 9A9, Canada
| | - Tarek Rouissi
- Institut National de Recherche Scientifique, 490 de la Couronne (Qc), Québec G1K 9A9, Canada
| | - Satinder Kaur Brar
- Institut National de Recherche Scientifique, 490 de la Couronne (Qc), Québec G1K 9A9, Canada
| | - Caroline Côté
- Institut de Recherche et de Développement en Agroenvironnement, 2700 rue Einstein-Québec, Québec G1P 3W8, Canada
| | - Antonio Avalos Ramirez
- Centre National en Électrochimie et en Technologies Environnementales, 2263 Avenue du Collège, Shawinigan, Québec G9N 6V8, Canada
| | - Stéphane Godbout
- Institut de Recherche et de Développement en Agroenvironnement, 2700 rue Einstein-Québec, Québec G1P 3W8, Canada
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23
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Jajere SM, Lawal JR, Atsanda NN, Hamisu TM, Goni MD. Prevalence and burden of gastrointestinal helminthes among grey-breasted helmet guinea fowls ( Numida meleagris galeata) encountered in Gombe state, Nigeria. Int J Vet Sci Med 2018; 6:73-79. [PMID: 30255082 PMCID: PMC6147383 DOI: 10.1016/j.ijvsm.2018.04.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 04/26/2018] [Accepted: 04/27/2018] [Indexed: 11/28/2022] Open
Abstract
This cross sectional survey was conducted from July to December 2015 in order to investigate the burden of gastrointestinal helminthes among guinea fowls in Gombe, Northeastern Nigeria. A total of six hundred fowls (viscera) were purchased from six randomly selected slaughter slabs. Out of the 600 birds examined, 479 (79.83%; 95% CI: 76.4, 82.9) were found harbouring one or more gastrointestinal helminthes. Of this, 238 birds (39.7%; 35.8, 43.6) were infected by nematode species and 392 birds (65.3%; 61.4, 69.0) by cestode species. A total of nine nematodes and seven cestodes species were recovered from these birds. There was no any trematode observed among the studied birds. The prevalences of the nematodes identified in descending order were: Ascaridia galli 56.7% (52.7, 60.6); Ascaridia numidae 38.0% (34.2, 42.0); Heterakis gallinarum 17.2% (14.4, 20.4); Heterakis meleagridis 8.3% (6.4, 10.8); Strongyloides avium 3.5% (2.3, 5.3); Subulura brumpti 3.2% (2.0, 5.0); Gongylonema ingluvicola 2.2% (1.3, 3.7) and both Dispharynx spiralis and Tetrameres numidae had 0.7% (0.3, 1.7). While for cestodes: Raillietina tetragona 72.8% (69.1, 76.2); Raillietina echinobothrida 67.3% (63.5, 71.0); Raillietina cesticillus 50% (46.0, 54.0); Raillietina magninumida 25.7% (22.3, 29.3); Hymenolopsis cantaniana 17.3% (14.5, 20.6); Davainea nana 4.2% (2.8, 6.1) and the lowest was observed in Choanotaenia infundibulum with 2% (1.2, 3.5). Infection rates did not differ significantly based on sex (P > 0.05). However, the occurrence of mixed infection as compared with single infection was statistically significant in both cestodes and nematodes (P < 0.001). The results obtained indicated high prevalence of gastrointestinal helminthes among guinea fowls. These birds may serve as important source of helminthes to other commercial birds in the study area.
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Affiliation(s)
- Saleh M Jajere
- Department of Pathology and Microbiology, Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia.,Department of Veterinary Public Health and Preventive Medicine, Faculty of Veterinary Medicine, University of Maiduguri, P.M.B 1069 Maiduguri, Borno State, Nigeria
| | - Jallailudeen R Lawal
- Department of Veterinary Medicine, Faculty of Veterinary Medicine, University of Maiduguri, P.M.B 1069 Maiduguri, Borno State, Nigeria
| | - Naphtali N Atsanda
- Department of Veterinary Public Health and Preventive Medicine, Faculty of Veterinary Medicine, University of Maiduguri, P.M.B 1069 Maiduguri, Borno State, Nigeria
| | - Tasiu M Hamisu
- Department of Veterinary Microbiology, Faculty of Veterinary Medicine, University of Maiduguri, P.M.B 1069 Maiduguri, Borno State, Nigeria
| | - Mohammed D Goni
- Unit of Biostatistics and Research Methodology, School of Medical Sciences, Universiti Sains Malaysia, Health Campus, Kubang Kerian, Kelantan, Malaysia
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Cooper C, Moore SC, Moore RJ, Chandry PS, Fegan N. Salmonella enterica subsp. salamae serovar Sofia, a prevalent serovar in Australian broiler chickens, is also capable of transient colonisation in layers. Br Poult Sci 2018; 59:270-277. [PMID: 29493264 DOI: 10.1080/00071668.2018.1447083] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
1. Salmonella enterica subsp. salamae serovar sofia (S. sofia) is a prevalent strain of Salmonella in Australian broilers and has been isolated from broiler chickens, litter, dust, as well as pre- and post-processing carcasses, and retail chicken portions but has never been reported in commercial Australian layers or eggs. 2. To investigate whether a S. sofia isolate from a broiler could colonise layers, one-month-old Hyline brown layers were orally inoculated with S. sofia and colonisation was monitored for 2-4 weeks. 3. Overall, 30-40% of the chickens shed S. sofia from the cloaca between 6 and 14 d post-inoculation which then declined to 10% by d 21. Necropsy at 2 weeks post-inoculation revealed 80% of birds harboured S. sofia in the caecum, whilst, by 4 weeks post-infection, no chickens were colonised with S. sofia in the gastrointestinal tract, liver or spleen. Additionally, no aerosol 'bird to bird' transfer was evident. 4. This study demonstrated that laying hens can be colonised by broiler-derived S. sofia; however, this colonisation was transient, reaching a peak at 14 d post-inoculation, and was completely cleared by 28 d post-inoculation. The transience of colonisation of S. sofia in layers could be a factor explaining why S. sofia has never been detected when screening for Salmonella serotypes found in Australian laying hens or eggs.
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Affiliation(s)
| | - Sean C Moore
- b CSIRO Agriculture & Food , Werribee , Australia
| | - Robert J Moore
- c School of Science , RMIT University , Bundoora , Australia
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25
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Clothier KA, Kim P, Mete A, Hill AE. Frequency, serotype distribution, and antimicrobial susceptibility patterns of Salmonella in small poultry flocks in California. J Vet Diagn Invest 2018; 30:471-475. [PMID: 29405899 DOI: 10.1177/1040638718755418] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Backyard poultry operations are increasingly popular and commonplace in both rural and suburban locations. Although Salmonella surveillance programs are well established for large commercial poultry systems, information on smaller operations is lacking. We identified the occurrence and serotype distribution of Salmonella spp. recovered from backyard flock cases submitted to the California Animal Health and Food Safety Laboratory System (Davis, CA) in 2012-2015, and evaluated minimum inhibitory concentration for 12 antimicrobials as well as the lesions associated with Salmonella spp. in these cases. From records of 2,347 backyard flock cases with 2,627 samples, 44 samples (1.7%) were positive for Salmonella spp. DNA by PCR, and 41 (1.6%) of these samples yielded a Salmonella isolate by culture for further characterization. Seventeen different serotypes, including 3 isolates identified to the serogroup level, were identified from these isolates. Antimicrobial resistance was infrequent; however, 2 multidrug-resistant isolates were identified. Enteric or systemic lesions associated with Salmonella recovery were uncommon, with 77.3% of cases having no disease attributable to Salmonella. Recovered serotypes overlap with those seen in commercial poultry as well as in foodborne outbreaks reported by the Centers for Disease Control and Prevention in humans. Zoonotic risks via contact and food product contamination make monitoring of backyard flocks for Salmonella a critical part of flock surveillance programs, and we propose a potential sampling scheme.
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Affiliation(s)
- Kristin A Clothier
- California Animal Health & Food Safety Lab System, School of Veterinary Medicine, University of California, Davis, CA
| | - Peony Kim
- California Animal Health & Food Safety Lab System, School of Veterinary Medicine, University of California, Davis, CA
| | - Aslı Mete
- California Animal Health & Food Safety Lab System, School of Veterinary Medicine, University of California, Davis, CA
| | - Ashley E Hill
- California Animal Health & Food Safety Lab System, School of Veterinary Medicine, University of California, Davis, CA
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26
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Long M, Yu H, Chen L, Wu G, Zhao S, Deng W, Chen S, Zhou K, Liu S, He L, Ao X, Yan Y, Ma M, Wang H, Davis MA, Jones L, Li B, Zhang A, Zou L. Recovery of Salmonella isolated from eggs and the commercial layer farms. Gut Pathog 2017; 9:74. [PMID: 29255489 PMCID: PMC5729242 DOI: 10.1186/s13099-017-0223-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Accepted: 12/05/2017] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Salmonella is recognized as a common bacterial cause of foodborne diarrheal illness worldwide, and animal or its food products have been the most common vehicles of the Salmonella infections. This study aimed to investigate the distribution of Salmonella in two commercial layer farms and to determine the genetic relatedness between these strains. The Salmonella isolates were serotyped by slide agglutination using commercial antisera and analyzed for genetic relatedness using pulsed-field gel electrophoresis (PFGE). RESULTS The internal environment had the highest prevalence of Salmonella (14/15, 93.3%), followed by external environment (60/96, 62.5%) and egg samples (23/84, 27.3%). The prevalence of Salmonella in the environment was significantly higher than that in egg samples (p < 0.05). The occurrence of Salmonella in the internal environment (93.3%) was relatively higher than in the external environment (55.6-77.2%). The 111 isolates were distributed among 15 PFGE types, and the PFGE results suggested that there existed cross-contamination between these strains not only from eggs, but also from the environments. CONCLUSIONS The findings indicated ongoing Salmonella cross-contamination inside or outside of the layer farms, and that Salmonella could also spread along the egg production line.
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Affiliation(s)
- Mei Long
- College of Resources, Sichuan Agricultural University, Chengdu, 611130 People’s Republic of China
| | - Hua Yu
- Sichuan Entry-Exit Inspection and Quarantine Bureau, Chengdu, 610041 People’s Republic of China
| | - Li Chen
- National Quality Supervision and Inspection Center of Liquor Products (Sichuan), Yibin, 644000 People’s Republic of China
| | - Guoyan Wu
- College of Resources, Sichuan Agricultural University, Chengdu, 611130 People’s Republic of China
| | - Siyue Zhao
- College of Resources, Sichuan Agricultural University, Chengdu, 611130 People’s Republic of China
| | - Wenwen Deng
- College of Resources, Sichuan Agricultural University, Chengdu, 611130 People’s Republic of China
| | - Shujuan Chen
- College of Food Science, Sichuan Agricultural University, Ya’an, 625014 People’s Republic of China
| | - Kang Zhou
- College of Food Science, Sichuan Agricultural University, Ya’an, 625014 People’s Republic of China
| | - Shuliang Liu
- College of Food Science, Sichuan Agricultural University, Ya’an, 625014 People’s Republic of China
| | - Li He
- College of Food Science, Sichuan Agricultural University, Ya’an, 625014 People’s Republic of China
| | - Xiaoling Ao
- College of Food Science, Sichuan Agricultural University, Ya’an, 625014 People’s Republic of China
| | - Yubao Yan
- Sichuan Entry-Exit Inspection and Quarantine Bureau, Chengdu, 610041 People’s Republic of China
| | - Menggen Ma
- College of Resources, Sichuan Agricultural University, Chengdu, 611130 People’s Republic of China
| | - Hongning Wang
- College of Food Science, Sichuan Agricultural University, Ya’an, 625014 People’s Republic of China
| | - Margaret A. Davis
- College of Life Sciences, Sichuan University, Chengdu, 610065 People’s Republic of China
| | - Lisa Jones
- College of Life Sciences, Sichuan University, Chengdu, 610065 People’s Republic of China
| | - Bei Li
- Dujiangyan Campus, Sichuan Agricultural University, Chengdu, 611830 People’s Republic of China
| | - Anyun Zhang
- College of Life Sciences, Sichuan University, Chengdu, 610065 People’s Republic of China
- College of Veterinary Medicine, Washington State University, Pullman, USA
| | - Likou Zou
- College of Resources, Sichuan Agricultural University, Chengdu, 611130 People’s Republic of China
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27
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ALEGRIA-MORAN R, RIVERA D, TOLEDO V, MORENO-SWITT AI, HAMILTON-WEST C. First detection and characterization of Salmonella spp. in poultry and swine raised in backyard production systems in central Chile. Epidemiol Infect 2017; 145:3180-3190. [PMID: 28927474 PMCID: PMC9148768 DOI: 10.1017/s0950268817002175] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Revised: 08/22/2017] [Accepted: 08/31/2017] [Indexed: 11/07/2022] Open
Abstract
Little is known about Salmonella serovars circulating in backyard poultry and swine populations worldwide. Backyard production systems (BPS) that raise swine and/or poultry are distributed across Chile, but are more heavily concentrated in central Chile, where industrialized systems are in close contact with BPS. This study aims to detect and identify circulating Salmonella serovars in poultry and swine raised in BPS. Bacteriological Salmonella isolation was carried out for 1744 samples collected from 329 BPS in central Chile. Faecal samples were taken from swine, poultry, geese, ducks, turkeys and peacocks, as well as environmental faecal samples. Confirmation of Salmonella spp. was performed using invA-polymerase chain reaction (PCR). Identification of serovars was carried out using a molecular serotyping approach, where serogroups were confirmed by a multiplex PCR of Salmonella serogroup genes for five Salmonella O antigens (i.e., D, B, C1, C2-C3, and E1), along with two PCR amplifications, followed by sequencing of fliC and fljB genes. A total of 25 samples (1·4% of total samples) from 15 BPS (4·6 % of total sampled BPS) were found positive for Salmonella. Positive samples were found in poultry (chickens and ducks), swine and environmental sources. Molecular prediction of serovars on Salmonella isolated showed 52·0% of S. Typhimurium, 16·0% of S. Infantis, 16·0% S. Enteritidis, 8·0% S. Hadar, 4·0% S. Tennessee and 4·0% S. Kentucky. Poor biosecurity measures were found on sampled BPS, where a high percentage of mixed confinement systems (72·8%); and almost half of the sampled BPS with improper management of infected mortalities (e.g. selling the carcasses of infected animals for consumption). Number of birds other than chickens (P = 0·014; OR = 1·04; IC (95%) = 1·01-1·07), mixed productive objective (P = 0·030; OR = 5·35; IC (95%) = 1·24-27·59) and mixed animal replacement origin (P = 0017; OR = 5·19; IC (95%) = 1·35-20·47) were detected as risk factors for BPS positivity to Salmonella spp. This is the first evidence of serovars of Salmonella spp. circulating in BPS from central Chile. Detected serovars have been linked to human and animal clinical outbreaks worldwide and in Chile, highlighting the importance of BPS on the control and dissemination of Salmonella serovars potentially hazardous to public health.
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Affiliation(s)
- R. ALEGRIA-MORAN
- Epidemiology Unit, Department of Preventive Veterinary Medicine, Faculty of Veterinary and Animal Sciences, Universidad de Chile, Santiago, Chile
- PhD Program in Agriculture, Forestry and Veterinary Science, Universidad de Chile, Santiago, Chile
| | - D. RIVERA
- Escuela de Medicina Veterinaria, Facultad de Ecología y Recursos Naturales, Universidad Andres Bello, Santiago, Chile
| | - V. TOLEDO
- Escuela de Medicina Veterinaria, Facultad de Ecología y Recursos Naturales, Universidad Andres Bello, Santiago, Chile
| | - A. I. MORENO-SWITT
- Escuela de Medicina Veterinaria, Facultad de Ecología y Recursos Naturales, Universidad Andres Bello, Santiago, Chile
| | - C. HAMILTON-WEST
- Epidemiology Unit, Department of Preventive Veterinary Medicine, Faculty of Veterinary and Animal Sciences, Universidad de Chile, Santiago, Chile
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Rodríguez FI, Pascal DC, Pulido D, Osinalde JM, Caffer MI, Bueno DJ. Prevalence, antimicrobial resistance profile and comparison of selective plating media for the isolation ofSalmonellain backyard chickens from Entre Rios, Argentina. Zoonoses Public Health 2017; 65:e95-e101. [DOI: 10.1111/zph.12415] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2017] [Indexed: 11/30/2022]
Affiliation(s)
- F. I. Rodríguez
- Instituto Nacional de Tecnología Agropecuaria EEA Concepción del Uruguay; Concepción del Uruguay Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Laboratorio de Sanidad Aviar; Instituto Nacional de Tecnología Agropecuaria EEA Concepción del Uruguay; Concepción del Uruguay Argentina
| | - D. C. Pascal
- Facultad de Ciencia y Tecnología, Sede Basavilbaso; Universidad Autónoma de Entre Ríos; Basavilbaso Argentina
| | - D. Pulido
- Fundación ArgenINTA; Paraná Argentina
| | - J. M. Osinalde
- Dirección General de Recursos Naturales; Ministerio de Producción de Entre Ríos; Paraná Argentina
| | - M. I. Caffer
- Servicio de Enterobacterias; Instituto Nacional de Enfermedades Infecciosas (INEI) - ANLIS “Dr Carlos G. Malbrán”; Ciudad de Buenos Aires Argentina
| | - D. J. Bueno
- Instituto Nacional de Tecnología Agropecuaria EEA Concepción del Uruguay; Concepción del Uruguay Argentina
- Facultad de Ciencia y Tecnología, Sede Basavilbaso; Universidad Autónoma de Entre Ríos; Basavilbaso Argentina
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Dynamics of Salmonella Shedding and Welfare of Hens in Free-Range Egg Production Systems. Appl Environ Microbiol 2017; 83:AEM.03313-16. [PMID: 28039133 DOI: 10.1128/aem.03313-16] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Accepted: 12/13/2016] [Indexed: 01/01/2023] Open
Abstract
The current study investigated the effect of environmental stressors (i.e., weather changes) on Salmonella shedding in free-range production systems and the correlations with behavioral and physiological measures (i.e., fecal glucocorticoid metabolites). This involved longitudinal and point-in-time surveys of Salmonella shedding and environmental contamination on four commercial free-range layer farms. The shedding of Salmonella was variable across free-range farms and in different seasons. There was no significant effect of season on the Salmonella prevalence during this investigation. In this study, the combined Salmonella most probable number (MPN) counts in environmental (including feces, egg belt, dust, nest box, and ramp) samples were highest in samples collected during the summer season (4th sampling, performed in February). The predominant serovars isolated during this study were Salmonella enterica serovar Mbandaka and Salmonella enterica serovar Typhimurium phage types 135 and 135a. These two phage types were involved in several egg product-related Salmonella outbreaks in humans. Multilocus variable-number tandem-repeat analysis (MLVA) results indicated that MLVA types detected from human food poisoning cases exhibited MLVA patterns similar to the strains isolated during this study. All Salmonella isolates (n = 209) were tested for 15 different genes involved in adhesion, invasion, and survival of Salmonella spp. We also observed variations for sopA, ironA, and misL There were no positive correlations between fecal corticosterone metabolite (FCM) and Salmonella prevalence and/or shedding in feces. Also, there were no positive correlations between Salmonella prevalence and Salmonella count (log MPN) and any of the other welfare parameters.IMPORTANCE In this study, the welfare of laying hens and Salmonella shedding were compared over a prolonged period of time in field conditions. This study investigated the long-term shedding of Salmonella serovars in a free-range egg production system. Given that there is increasing demand for free-range eggs, it is essential to understand the risks associated with such a production system.
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El-Tayeb MA, Ibrahim ASS, Al-Salamah AA, Almaary KS, Elbadawi YB. Prevalence, serotyping and antimicrobials resistance mechanism of Salmonella enterica isolated from clinical and environmental samples in Saudi Arabia. Braz J Microbiol 2017; 48:499-508. [PMID: 28245965 PMCID: PMC5498448 DOI: 10.1016/j.bjm.2016.09.021] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Accepted: 09/18/2016] [Indexed: 11/26/2022] Open
Abstract
Salmonella is recognized as a common foodborne pathogen, causing major health problems in Saudi Arabia. Herein, we report epidemiology, antimicrobial susceptibility and the genetic basis of resistance among S. enterica strains isolated in Saudi Arabia. Isolation of Salmonella spp. from clinical and environmental samples resulted in isolation of 33 strains identified as S. enterica based on their biochemical characteristics and 16S-rDNA sequences. S. enterica serovar Enteritidis showed highest prevalence (39.4%), followed by S. Paratyphi (21.2%), S. Typhimurium (15.2%), S. Typhi and S. Arizona (12.1%), respectively. Most isolates were resistant to 1st and 2nd generation cephalosporin; and aminoglycosides. Moreover, several S. enterica isolates exhibited resistance to the first-line antibiotics used for Salmonellosis treatment including ampicillin, trimethoprim–sulfamethoxazole and chloramphenicol. In addition, the results revealed the emergence of two S. enterica isolates showing resistance to third-generation cephalosporin. Analysis of resistance determinants in S. enterica strains (n = 33) revealed that the resistance to β-lactam antibiotics, trimethoprim–sulfamethoxazole, chloramphenicol, and tetracycline, was attributed to the presence of carb-like, dfrA1, floR, tetA gene, respectively. On the other hand, fluoroquinolone resistance was related to the presence of mutations in gyrA and parC genes. These findings improve the information about foodborne Salmonella in Saudi Arabia, alarming the emergence of multi-drug resistant S. enterica strains, and provide useful data about the resistance mechanisms.
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Affiliation(s)
- Mohamed A El-Tayeb
- King Saud University, College of Science, Department of Botany and Microbiology, Riyadh, Saudi Arabia
| | - Abdelnasser S S Ibrahim
- King Saud University, College of Science, Department of Botany and Microbiology, Riyadh, Saudi Arabia; National Research Center, Pharmaceutical Industries Research Division, Department of Chemistry of Natural and Microbial Products, Cairo, Egypt.
| | - Ali A Al-Salamah
- King Saud University, College of Science, Department of Botany and Microbiology, Riyadh, Saudi Arabia
| | - Khalid S Almaary
- King Saud University, College of Science, Department of Botany and Microbiology, Riyadh, Saudi Arabia
| | - Yahya B Elbadawi
- King Saud University, College of Science, Department of Botany and Microbiology, Riyadh, Saudi Arabia
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