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Teng KTY, Aerts M, Jaspers S, Ugarte-Ruiz M, Moreno MA, Saez JL, Collado S, de Frutos C, Dominguez L, Alvarez J. Patterns of antimicrobial resistance in Salmonella isolates from fattening pigs in Spain. BMC Vet Res 2022; 18:333. [PMID: 36057710 PMCID: PMC9440507 DOI: 10.1186/s12917-022-03377-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 07/04/2022] [Indexed: 11/16/2022] Open
Abstract
Background Swine are considered a major source of foodborne salmonellosis, a public health issue further complicated by the circulation of multidrug-resistant Salmonella strains that threaten the safety of the food chain. The current study aimed to identify patterns that can help to understand the epidemiology of antimicrobial resistance (AMR) in Salmonella in pigs in Spain through the application of several multivariate statistical methods to data from the AMR national surveillance programs from 2001 to 2017. Results A total of 1,318 pig Salmonella isolates belonging to 63 different serotypes were isolated and their AMR profiles were determined. Tetracycline resistance across provinces in Spain was the highest among all antimicrobials and ranged from 66.7% to 95.8%, followed by sulfamethoxazole resistance (range: 42.5% − 77.8%), streptomycin resistance (range: 45.7% − 76.7%), ampicillin resistance (range: 24.3% − 66.7%, with a lower percentage of resistance in the South-East of Spain), and chloramphenicol resistance (range: 8.5% − 41.1%). A significant increase in the percentage of resistant isolates to chloramphenicol, sulfamethoxazole, ampicillin and trimethoprim from 2013 to 2017 was observed. Bayesian network analysis showed the existence of dependencies between resistance to antimicrobials of the same but also different families, with chloramphenicol and sulfamethoxazole in the centre of the networks. In the networks, the conditional probability for an isolate susceptible to ciprofloxacin that was also susceptible to nalidixic acid was 0.999 but for an isolate resistant to ciprofloxacin that was also resistant to nalidixic acid was only 0.779. An isolate susceptible to florfenicol would be expected to be susceptible to chloramphenicol, whereas an isolate resistant to chloramphenicol had a conditional probability of being resistant to florfenicol at only 0.221. Hierarchical clustering further demonstrated the linkage between certain resistances (and serotypes). For example, a higher likelihood of multidrug-resistance in isolates belonging to 1,4,[5],12:i:- serotype was found, and in the cluster where all isolates were resistant to tetracycline, chloramphenicol and florfenicol, 86.9% (n = 53) of the isolates were Typhimurium. Conclusion Our study demonstrated the power of multivariate statistical methods in discovering trends and patterns of AMR and found the existence of serotype-specific AMR patterns for serotypes of public health concern in Salmonella isolates in pigs in Spain. Supplementary Information The online version contains supplementary material available at 10.1186/s12917-022-03377-3.
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Affiliation(s)
- Kendy Tzu-Yun Teng
- VISAVET Health Surveillance Centre, Universidad Complutense, Madrid, Spain. .,Department of Veterinary Medicine, College of Veterinary Medicine, National Chung Hsing University, Taichung City, Taiwan.
| | - Marc Aerts
- Interuniversity Institute for Biostatistics and Statistical Bioinformatics, Hasselt University, Diepenbeek, Belgium.,Data Science Institute, Hasselt University, Diepenbeek, Belgium
| | - Stijn Jaspers
- Interuniversity Institute for Biostatistics and Statistical Bioinformatics, Hasselt University, Diepenbeek, Belgium.,Data Science Institute, Hasselt University, Diepenbeek, Belgium
| | - Maria Ugarte-Ruiz
- VISAVET Health Surveillance Centre, Universidad Complutense, Madrid, Spain
| | - Miguel A Moreno
- VISAVET Health Surveillance Centre, Universidad Complutense, Madrid, Spain.,Department of Animal Health, Faculty of Veterinary Medicine, Universidad Complutense, Madrid, Spain
| | - Jose Luis Saez
- Subdirección General de Sanidad e Higiene Animal y Trazabilidad, Dirección General de La Producción Agraria, Ministerio de Agricultura, Pesca y Alimentación, Madrid, Spain
| | - Soledad Collado
- Subdirección General de Sanidad e Higiene Animal y Trazabilidad, Dirección General de La Producción Agraria, Ministerio de Agricultura, Pesca y Alimentación, Madrid, Spain
| | - Cristina de Frutos
- Laboratorio Central de Veterinaria (LCV Algete), Ministerio de Agricultura, Pesca y Alimentación, Madrid, Spain
| | - Lucas Dominguez
- VISAVET Health Surveillance Centre, Universidad Complutense, Madrid, Spain.,Department of Animal Health, Faculty of Veterinary Medicine, Universidad Complutense, Madrid, Spain
| | - Julio Alvarez
- VISAVET Health Surveillance Centre, Universidad Complutense, Madrid, Spain.,Department of Animal Health, Faculty of Veterinary Medicine, Universidad Complutense, Madrid, Spain
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2
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Gil‐Molino M, Gonçalves P, Risco D, Martín‐Cano FE, García A, Rey J, Fernández‐Llario P, Quesada A. Dissemination of antimicrobial-resistant isolates of Salmonella spp. in wild boars and its relationship with management practices. Transbound Emerg Dis 2022; 69:e1488-e1502. [PMID: 35182450 PMCID: PMC9790216 DOI: 10.1111/tbed.14480] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 02/08/2022] [Accepted: 02/10/2022] [Indexed: 12/30/2022]
Abstract
Antimicrobial resistance (AMR) is a global concern and controlling its spread is critical for the effectiveness of antibiotics. Members of the genus Salmonella are broadly distributed, and wild boar may play an important role in its circulation between peri-urban areas and the environment, due to its frequent interactions both with livestock or human garbage. As the population of these animals is rising due to management on certain hunting estates or the absence of natural predators, the aim of the present work is to identify the mechanisms of AMR present and/or expressed in Salmonella spp. from wild boar populations and to determine the possible role of management-related factors applied to different game estates located in central Spain. The detection of Salmonella spp. was carried out in 121 dead wild boar from 24 game estates, and antimicrobial resistance traits were determined by antibiotic susceptibility testing and screening for their genetic determinants. The effects of feeding supplementation, the proximity of livestock, the existence of a surrounding fence and the density of wild boar on the AMR of the isolates were evaluated. The predominant subspecies and serovar found were S. enterica subsp. enterica (n = 69) and S. choleraesuis (n = 33), respectively. The other subspecies found were S. enterica subsp. diarizonae, S. enterica subsp. salamae and S. enterica subsp. houtenae. AMR was common among isolates (75.2%) and 15.7% showed multi drug resistance (MDR). Resistance to sulphonamides was the most frequent (85.7%), as well as sul1 which was the AMR determinant most commonly found. Plasmids appeared in 38.8% of the isolates, with IncHI1 being the replicon detected with the highest prevalence. The AMR of the isolates increased when the animals were raised with feeding supplementation and enclosed by fences around the estates.
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Affiliation(s)
- María Gil‐Molino
- Facultad de Veterinaria, Unidad de Patología InfecciosaUniversidad de ExtremaduraCáceresSpain
| | - Pilar Gonçalves
- Innovación en Gestión y Conservación de Ingulados S.L. CáceresCáceresSpain
| | - David Risco
- Innovación en Gestión y Conservación de Ingulados S.L. CáceresCáceresSpain,Neobeitar S.L. CáceresCáceresSpain
| | | | | | - Joaquín Rey
- Facultad de Veterinaria, Unidad de Patología InfecciosaUniversidad de ExtremaduraCáceresSpain
| | | | - Alberto Quesada
- Facultad de Veterinaria, Departamento de BioquímicaBiología Molecular y Genética, Universidad de ExtremaduraCáceresSpain,INBIO G+CUniversidad de ExtremaduraCáceresSpain
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3
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D'Incau M, Salogni C, Giovannini S, Ruggeri J, Scali F, Tonni M, Formenti N, Guarneri F, Pasquali P, Alborali GL. Occurrence of Salmonella Typhimurium and its monophasic variant (4, [5],12:i:-) in healthy and clinically ill pigs in northern Italy. Porcine Health Manag 2021; 7:34. [PMID: 33902758 PMCID: PMC8073912 DOI: 10.1186/s40813-021-00214-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 04/19/2021] [Indexed: 11/22/2022] Open
Abstract
Background The serovar Typhimurium (4, [5],12:i:1,2), is the most frequently isolated serovar in case of salmonellosis in pigs in Europe and its monophasic variant (4, [5],12:i:-) has been increasingly responsible for Salmonella outbreaks in humans. A total of 25,215 samples were collected, during the years 2002–2017, from 1359 pig farms located in Northern Italy. Samples were collected from different material sources including fecal samples, rectal swabs, gut content and different organs. Results Salmonella was isolated in 15.80% of samples and, among the isolates, 733 were typed as Salmonella Typhimurium (ST) or its monophasic variant (MST). Over time, there was an increase of isolation of MST which outnumbered ST. Most of the strains were isolated in animals during the weaning stage and the growing – fattening period whereas the clinical cases were mainly present in young pigs after weaning. Conclusions This study confirms the presence of ST and MST in pig farms although, considering the total of isolated serotypes, with lower percentages than previously reported. In the last few years, ST has increasingly been replaced by MST suggesting that MST has a competitive advantage over ST, probably due to its different antigenicity and pathogenicity which renders the infection stealthier to recognize and control.
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Affiliation(s)
- Mario D'Incau
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia-Romagna "Bruno Ubertini", via Bianchi 9, 25124, Brescia, Italy.
| | - Cristian Salogni
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia-Romagna "Bruno Ubertini", via Bianchi 9, 25124, Brescia, Italy
| | - Stefano Giovannini
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia-Romagna "Bruno Ubertini", via Bianchi 9, 25124, Brescia, Italy
| | - Jessica Ruggeri
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia-Romagna "Bruno Ubertini", via Bianchi 9, 25124, Brescia, Italy
| | - Federico Scali
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia-Romagna "Bruno Ubertini", via Bianchi 9, 25124, Brescia, Italy
| | - Matteo Tonni
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia-Romagna "Bruno Ubertini", via Bianchi 9, 25124, Brescia, Italy
| | - Nicoletta Formenti
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia-Romagna "Bruno Ubertini", via Bianchi 9, 25124, Brescia, Italy
| | - Flavia Guarneri
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia-Romagna "Bruno Ubertini", via Bianchi 9, 25124, Brescia, Italy
| | - Paolo Pasquali
- Department of Food Safety, Nutrition and Veterinary Public Health, Istituto Superiore di Sanità, viale Regina Elena 299, 00161, Roma, Italy
| | - Giovanni Loris Alborali
- Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia-Romagna "Bruno Ubertini", via Bianchi 9, 25124, Brescia, Italy
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4
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Vico JP, Lorenzutti AM, Zogbi AP, Aleu G, Sánchez IC, Caffer MI, Rosmini MR, Mainar-Jaime RC. Prevalence, associated risk factors, and antimicrobial resistance profiles of non-typhoidal Salmonella in large scale swine production in Córdoba, Argentina. Res Vet Sci 2020; 130:161-169. [PMID: 32193003 DOI: 10.1016/j.rvsc.2020.03.003] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 02/04/2020] [Accepted: 03/02/2020] [Indexed: 11/15/2022]
Abstract
Non-typhoidal Salmonella is considered a major public health concern. The growing relevance of pigs as reservoir of Salmonella spp. has prompted several countries to set up surveillance and control programs to fight Salmonella infection in swine and reduce public health risk. In the last decade, pork production in Córdoba increased significantly to become one of the most important pig production provinces in Argentina. The aim of this study was to estimate Salmonella spp. prevalence and associated risk factors in large scale-farms in this province. Mesenteric lymph nodes (MLN) of 580 pigs from 20 finishing large-scale farms were collected between 2014 and 2015 to estimate Salmonella infection. A prevalence of 41.5% (95%CI: 37.6-45.6%) was observed. Two major risk factors were significantly associated with Salmonella infection, both related to the pre-slaughter period (distance from the farm to the slaughterhouse and lairage time), highlighting the need to pay special attention to pre-slaughter practices in the province. Shortening transport times and complying with national regulations for lairage time at slaughter may help to reduce the prevalence of infection. Sixteen different serovars were identified, being S. Anatum and S. Typhimurium the most prevalent ones. Moreover, two isolate of the monophasic variant of Salmonella Typhimurium (I 4,5,12:i:-) resistant to enrofloxacin and which also displayed multidrug resistance was isolated for first time from pigs in Córdoba. The moderate to high levels of antimicrobial resistance detected for antibiotics commonly used in the pig sector suggested the need for implementing a plan to limit their use in the province.
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Affiliation(s)
- J P Vico
- Instituto de Investigaciones en Recursos Humanos y Sustentabilidad, José Sánchez Labrador S.J IRNASUS-Conicet-Univesidad Católica de Córdoba, Facultad de Ciencias Agropecuarias, Veterinaria, Universidad Católica de Córdoba, Av. Armada Argentina 3555, X5016DHK Córdoba, Argentina.
| | - A M Lorenzutti
- Instituto de Investigaciones en Recursos Humanos y Sustentabilidad, José Sánchez Labrador S.J IRNASUS-Conicet-Univesidad Católica de Córdoba, Facultad de Ciencias Agropecuarias, Veterinaria, Universidad Católica de Córdoba, Av. Armada Argentina 3555, X5016DHK Córdoba, Argentina
| | - A P Zogbi
- Instituto de Investigaciones en Recursos Humanos y Sustentabilidad, José Sánchez Labrador S.J IRNASUS-Conicet-Univesidad Católica de Córdoba, Facultad de Ciencias Agropecuarias, Veterinaria, Universidad Católica de Córdoba, Av. Armada Argentina 3555, X5016DHK Córdoba, Argentina
| | - G Aleu
- Instituto de Investigaciones en Recursos Humanos y Sustentabilidad, José Sánchez Labrador S.J IRNASUS-Conicet-Univesidad Católica de Córdoba, Facultad de Ciencias Agropecuarias, Veterinaria, Universidad Católica de Córdoba, Av. Armada Argentina 3555, X5016DHK Córdoba, Argentina
| | - I C Sánchez
- Instituto de Investigaciones en Recursos Humanos y Sustentabilidad, José Sánchez Labrador S.J IRNASUS-Conicet-Univesidad Católica de Córdoba, Facultad de Ciencias Agropecuarias, Veterinaria, Universidad Católica de Córdoba, Av. Armada Argentina 3555, X5016DHK Córdoba, Argentina
| | - M I Caffer
- Servicio de Enterobacterias, Instituto Nacional de Enfermedades Infecciosas (INEI) - ANLIS "Dr. Carlos G. Malbrán", Avenida Velez Sarfield 563, C1282AFF Ciudad Autónoma de Buenos Aires, Argentina
| | - M R Rosmini
- Universidad Nacional del Litoral, Facultad de Ciencias Veterinarias, R.P. Kreder 2805, S3080HOF Esperanza, Santa Fe, Argentina
| | - R C Mainar-Jaime
- Departamento de Patología Animal, Facultad de Veterinaria, Instituto Agroalimentario de Aragón - IA2 - (Universidad de Zaragoza-CITA), Calle de Miguel Servet 177, 50013 Zaragoza, Spain
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5
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Naberhaus SA, Krull AC, Arruda BL, Arruda P, Sahin O, Schwartz KJ, Burrough ER, Magstadt DR, Matias Ferreyra F, Gatto IRH, Meiroz de Souza Almeida H, Wang C, Kreuder AJ. Pathogenicity and Competitive Fitness of Salmonella enterica Serovar 4,[5],12:i:- Compared to Salmonella Typhimurium and Salmonella Derby in Swine. Front Vet Sci 2020; 6:502. [PMID: 32083096 PMCID: PMC7002397 DOI: 10.3389/fvets.2019.00502] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Accepted: 12/19/2019] [Indexed: 12/14/2022] Open
Abstract
Since 2014, Salmonella 4,[5],12:i:- has emerged as the most common serovar of Salmonella enterica identified from swine samples submitted to veterinary diagnostic laboratories in the United States. To compare the pathogenicity of S. 4,[5],12:i:- in swine to the known pathogenic Salmonella Typhimurium and lesser pathogenic Salmonella Derby, 72 pigs (20 per Salmonella serovar treatment and 12 controls) were inoculated with either S. Typhimurium, S. 4,[5],12:i:-, S. Derby, or sham-inoculated and followed for up to 28 days thereafter via rectal temperature, fecal scoring, and fecal culture. Animals were euthanized on days 2, 4, or 28 to determine the gross and histopathologic signs of disease and tissue colonization. The results clearly demonstrate that for the isolates selected, serovar 4,[5],12:i:- possesses similar ability as serovar Typhimurium to cause clinical disease, colonize the tonsils and ileocecal lymph nodes, and be shed in the feces of infected swine past resolution of clinical disease. To compare the competitive fitness of S. 4,[5],12:i:- to S. Typhimurium in swine when co-infected, 12 pigs were co-inoculated with equal concentrations of both S. Typhimurium and S. 4,[5],12:i and followed for up to 10 days thereafter. When co-inoculated, serovar 4,[5],12:i:- was consistently detected in the feces of a higher percentage of pigs and at higher concentrations than serovar Typhimurium, suggesting an increased competitive fitness of 4,[5],12:i:- relative to serovar Typhimurium when inoculated simultaneously into naïve pigs. Whole genome sequencing analysis of the isolates used in these studies revealed similar virulence factor presence in all S. 4,[5],12:i:- and S. Typhimurium isolates, but not S. Derby, providing additional evidence for similar pathogenicity potential between serovars 4,[5],12:i:- and Typhimurium. Altogether, this data strongly supports the hypothesis that S. 4,[5],12:i:- is a pathogen of swine and suggests a mechanism through increased competitive fitness for the increasing identification of Salmonella 4,[5],12:i:- in swine diagnostic samples over the past several years.
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Affiliation(s)
- Samantha A Naberhaus
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
| | - Adam C Krull
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
| | - Bailey L Arruda
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
| | - Paulo Arruda
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
| | - Orhan Sahin
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
| | - Kent J Schwartz
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
| | - Eric R Burrough
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
| | - Drew R Magstadt
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
| | - Franco Matias Ferreyra
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
| | - Igor R H Gatto
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
| | - Henrique Meiroz de Souza Almeida
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
| | - Chong Wang
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA, United States.,Department of Statistics, College of Liberal Arts and Sciences, Iowa State University, Ames, IA, United States
| | - Amanda J Kreuder
- Department of Veterinary Diagnostic and Production Animal Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA, United States.,Department of Veterinary Microbiology and Preventive Medicine, College of Veterinary Medicine, Iowa State University, Ames, IA, United States
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6
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Jajere SM. A review of Salmonella enterica with particular focus on the pathogenicity and virulence factors, host specificity and antimicrobial resistance including multidrug resistance. Vet World 2019; 12:504-521. [PMID: 31190705 PMCID: PMC6515828 DOI: 10.14202/vetworld.2019.504-521] [Citation(s) in RCA: 279] [Impact Index Per Article: 55.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 02/11/2019] [Indexed: 12/03/2022] Open
Abstract
Salmonella genus represents the most common foodborne pathogens frequently isolated from food-producing animals that is responsible for zoonotic infections in humans and animal species including birds. Thus, Salmonella infections represent a major concern to public health, animals, and food industry worldwide. Salmonella enterica represents the most pathogenic specie and includes > 2600 serovars characterized thus far. Salmonella can be transmitted to humans along the farm-to-fork continuum, commonly through contaminated foods of animal origin, namely poultry and poultry-related products (eggs), pork, fish etc. Some Salmonella serovars are restricted to one specific host commonly referred to as "host-restricted" whereas others have broad host spectrum known as "host-adapted" serovars. For Salmonella to colonize its hosts through invading, attaching, and bypassing the host's intestinal defense mechanisms such as the gastric acid, many virulence markers and determinants have been demonstrated to play crucial role in its pathogenesis; and these factors included flagella, capsule, plasmids, adhesion systems, and type 3 secretion systems encoded on the Salmonella pathogenicity island (SPI)-1 and SPI-2, and other SPIs. The epidemiologically important non-typhoidal Salmonella (NTS) serovars linked with a high burden of foodborne Salmonella outbreaks in humans worldwide included Typhimurium, Enteritidis, Heidelberg, and Newport. The increased number of NTS cases reported through surveillance in recent years from the United States, Europe and low- and middle-income countries of the world suggested that the control programs targeted at reducing the contamination of food animals along the food chain have largely not been successful. Furthermore, the emergence of several clones of Salmonella resistant to multiple antimicrobials worldwide underscores a significant food safety hazard. In this review, we discussed on the historical background, nomenclature and taxonomy, morphological features, physical and biochemical characteristics of NTS with a particular focus on the pathogenicity and virulence factors, host specificity, transmission, and antimicrobial resistance including multidrug resistance and its surveillance.
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Affiliation(s)
- Saleh Mohammed 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, PMB 1069, Maiduguri, Borno State, Nigeria
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7
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SEO BJ, SONG ET, LEE K, KIM JW, JEONG CG, MOON SH, SON JS, KANG SH, CHO HS, JUNG BY, KIM WI. Evaluation of the broad-spectrum lytic capability of bacteriophage cocktails against various Salmonella serovars and their effects on weaned pigs infected with Salmonella Typhimurium. J Vet Med Sci 2018; 80:851-860. [PMID: 29618667 PMCID: PMC6021886 DOI: 10.1292/jvms.17-0501] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Accepted: 03/19/2018] [Indexed: 11/22/2022] Open
Abstract
The broad-spectrum lytic capability of Salmonella bacteriophages against various Salmonella species was evaluated to determine their potential as an alternative for antibiotics, and the safety and preventive effects of the bacteriophages were assessed on mice and pigs. Four bacteriophage cocktails were prepared using 13 bacteriophages, and the lytic capability of the four bacteriophage cocktails was tested using Salmonella reference strains and field isolates. Bacteriophage cocktail C (SEP-1, SGP-1, STP-1, SS3eP-1, STP-2, SChP-1, SAP-1, SAP-2; ≥109 pfu/ml) showed the best lytic activity against the Salmonella reference strains (100% of 34) and field isolates (92.5% of 107). Fifty mice were then orally inoculated with bacteriophage cocktail C to determine the distribution of bacteriophages in various organs, blood and feces. The effects of bacteriophages on Salmonella infection in weaned pigs (n=15) were also evaluated through an experimental challenge with Salmonella Typhimurium after treatment with bacteriophage cocktail C. All mice exhibited distribution of the bacteriophages in all organs, blood and feces until 15 days post infection (dpi). After 35 dpi, bacteriophages were not detected in any of these specimens. As demonstrated in a pig challenge study, treatment with bacteriophage cocktail C reduced the level of Salmonella shedding in feces. The metagenomic analyses of these pig feces also revealed that bacteriophage treatment decreased the number of species of the Enterobacteriaceae family without significant disturbance to the normal fecal flora. This study showed that bacteriophages effectively controlled Salmonella in a pig challenge model and could be a good alternative for antibiotics to control Salmonella infection.
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Affiliation(s)
- Byoung-Joo SEO
- College of Veterinary Medicine, Chonbuk National University,
Iksan 54596, Republic of Korea
| | - Eu-Tteum SONG
- Bacterial Disease Division, Animal and Plant Quarantine
Agency, Gimcheon 39660, Republic of Korea
| | - Kichan LEE
- Bacterial Disease Division, Animal and Plant Quarantine
Agency, Gimcheon 39660, Republic of Korea
| | - Jong-Won KIM
- College of Veterinary Medicine, Chonbuk National University,
Iksan 54596, Republic of Korea
| | - Chang-Gi JEONG
- College of Veterinary Medicine, Chonbuk National University,
Iksan 54596, Republic of Korea
| | - Sung-Hyun MOON
- College of Veterinary Medicine, Chonbuk National University,
Iksan 54596, Republic of Korea
| | - Jee Soo SON
- iNtRON Biotechnology, Inc., Room 903, JungAng Induspia V,
137, Sagimakgol-ro, Jungwon-gu, Seongnam-si, Gyeonggi-do, 13202, Republic of Korea
| | - Sang Hyeon KANG
- iNtRON Biotechnology, Inc., Room 903, JungAng Induspia V,
137, Sagimakgol-ro, Jungwon-gu, Seongnam-si, Gyeonggi-do, 13202, Republic of Korea
| | - Ho-Seong CHO
- College of Veterinary Medicine, Chonbuk National University,
Iksan 54596, Republic of Korea
| | - Byeong Yeal JUNG
- Bacterial Disease Division, Animal and Plant Quarantine
Agency, Gimcheon 39660, Republic of Korea
| | - Won-Il KIM
- College of Veterinary Medicine, Chonbuk National University,
Iksan 54596, Republic of Korea
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8
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Argüello H, Guerra B, Rodríguez I, Rubio P, Carvajal A. Characterization of Antimicrobial Resistance Determinants and Class 1 and Class 2 Integrons in Salmonella enterica spp., Multidrug-Resistant Isolates from Pigs. Genes (Basel) 2018; 9:E256. [PMID: 29772742 PMCID: PMC5977196 DOI: 10.3390/genes9050256] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 05/02/2018] [Accepted: 05/08/2018] [Indexed: 11/24/2022] Open
Abstract
Antimicrobial resistance (AMR) and Salmonella spp., are primary concerns in public health. The present study characterizes the AMR determinants of 62 multi-drug resistant (MDR) Salmonella enterica spp., isolates from swine, which were obtained between 2004⁻2006, a major source of human salmonellosis. The AMR determinants were investigated by PCR, checking the presence of class 1 and class 2 integrons and 29 resistance genes. Genes sul1, blaTEM1-like, aadA2, tet(A), and dfrA12 were more prevalent (p < 0.05) within the determinants that were checked for each of these antimicrobials. Co-existence of different genes conferring resistance to the same antimicrobial was common. No differences in AMR determinants prevalence were observed between Salmonella Typhimurium and other serovars from the study. Class 1 integrons were detected in 48 of 62 isolates, again with no differences being linked to any serovar. Nine different variable regions were observed, 1000 bp/aadA2-1200 bp/blaPSE-1 (13 isolates) and blaOXA-like/aadA1 (eight isolates) were the most common. Four isolates, including S. Typhimurium (2), Salmonella Bredeney (1), and Salmonella Kapemba (1) harboured a class 2 integron 2300 bp estX-sat2-aadA1. Results from the study highlight the importance of class 1 integrons and certain genes in MDR swine Salmonella isolates. The information is of relevance for monitoring in the forthcoming scope of reduction of antibiotic usage in swine production.
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Affiliation(s)
- Héctor Argüello
- Group of Genomics and Animal breeding, Department of Genetics, Faculty of Veterinary Medicine, University of Córdoba, 14071 Córdoba, Spain.
- Department of Animal Health, Faculty of Veterinary Medicine, University of León, 24007 León, Spain.
| | - Beatriz Guerra
- German Federal Institute for Risk Assessment, 10589 Berlin, Germany.
- European Food Safety Authority, 43126 Parma, Italy.
| | - Irene Rodríguez
- German Federal Institute for Risk Assessment, 10589 Berlin, Germany.
| | - Pedro Rubio
- Department of Animal Health, Faculty of Veterinary Medicine, University of León, 24007 León, Spain.
| | - Ana Carvajal
- Department of Animal Health, Faculty of Veterinary Medicine, University of León, 24007 León, Spain.
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9
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Oh SI, Kim JW, Chae M, Jung JA, So B, Kim B, Kim HY. Characterization and Antimicrobial Resistance of Salmonella Typhimurium Isolates from Clinically Diseased Pigs in Korea. J Food Prot 2016; 79:1884-1890. [PMID: 28221916 DOI: 10.4315/0362-028x.jfp-16-131] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
This study investigated the prevalence of Salmonella enterica serovar and antimicrobial resistance in Salmonella Typhimurium isolates from clinically diseased pigs collected from 2008 to 2014 in Korea. Isolates were also characterized according to the presence of antimicrobial resistance genes and pulsed-field gel electrophoresis patterns. Among 94 Salmonella isolates, 81 (86.2%) were identified as being of the Salmonella Typhimurium serotype, followed by Salmonella Derby (6 of 94, 6.4%), Salmonella 4,[5],12:i:- (4 of 94, 4.3%), Salmonella Enteritidis (2 of 94, 2.1%), and Salmonella Brandenburg (1 of 94, 1.1%). The majority of Salmonella Typhimurium isolates were resistant to tetracycline (92.6%), followed by streptomycin (88.9%) and ampicillin (80.2%). Overall, 96.3% of Salmonella Typhimurium isolates showed multidrug-resistant phenotypes and commonly harbored the resistance genes blaTEM (64.9%), flo (32.8%), aadA (55.3%), strA (58.5%), strB (58.5%), sulII (53.2%), and tetA (61.7%). The pulsed-field gel electrophoresis analysis of 45 Salmonella Typhimurium isolates from individual farms revealed 27 distinct patterns that formed one major and two minor clusters in the dendrogram analysis, suggesting that most of the isolates (91.1%) from diseased pigs were genetically related. These findings can assist veterinarians in the selection of appropriate antimicrobial agents to combat Salmonella Typhimurium infections in pigs. Furthermore, they highlight the importance of continuous surveillance of antimicrobial resistance and genetic status in Salmonella Typhimurium for the detection of emerging resistance trends.
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Affiliation(s)
- Sang-Ik Oh
- Animal Disease Diagnostic Division, Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon 39660, Republic of Korea.,College of Veterinary Medicine, Chonbuk National University, 79 Gobong-ro, Iksan 54596, Republic of Korea
| | - Jong Wan Kim
- Animal Disease Diagnostic Division, Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon 39660, Republic of Korea
| | - Myeongju Chae
- Animal Disease Diagnostic Division, Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon 39660, Republic of Korea
| | - Ji-A Jung
- Animal Disease Diagnostic Division, Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon 39660, Republic of Korea
| | - Byungjae So
- Animal Disease Diagnostic Division, Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon 39660, Republic of Korea
| | - Bumseok Kim
- College of Veterinary Medicine, Chonbuk National University, 79 Gobong-ro, Iksan 54596, Republic of Korea
| | - Ha-Young Kim
- Animal Disease Diagnostic Division, Animal and Plant Quarantine Agency, 177 Hyeoksin 8-ro, Gimcheon 39660, Republic of Korea
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Kempf I, Jouy E, Chauvin C. Colistin use and colistin resistance in bacteria from animals. Int J Antimicrob Agents 2016; 48:598-606. [PMID: 27836380 DOI: 10.1016/j.ijantimicag.2016.09.016] [Citation(s) in RCA: 156] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2016] [Revised: 08/04/2016] [Accepted: 09/15/2016] [Indexed: 11/28/2022]
Abstract
Colistin has been used in veterinary medicine for decades, mainly for the prevention and treatment of Enterobacteriaceae infections. However, data regarding colistin resistance in bacteria from animals and food of animal origin are relatively scarce, partly because there are methodological difficulties hampering the analysis of susceptibility to colistin. Most data regarding clinical isolates are related to enteropathogenic Escherichia coli and Salmonella. The resistance percentages are sometimes high for pathogenic strains, and the mcr-1 gene has been detected in pathogenic E. coli isolates from pigs, cattle and poultry in different countries. The prevalence of colistin resistance in Salmonella from healthy animals is usually low but depends on the proportion of intrinsically colistin-resistant serotypes. For indicator E. coli, the resistance levels are often very low, although higher levels have been observed in Asia. The mcr-1 gene has been detected in indicator E. coli from pigs, cattle, poultry and their products. Thus, there is an urgent need to re-assess the use of colistin in livestock throughout the world to ensure a global strategy for preserving this last-resort antimicrobial.
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Affiliation(s)
- Isabelle Kempf
- Ploufragan-Plouzané Laboratory, ANSES (French Agency for Food, Environmental and Occupational Health & Safety), Université Bretagne Loire, Ploufragan, France.
| | - Eric Jouy
- Ploufragan-Plouzané Laboratory, ANSES (French Agency for Food, Environmental and Occupational Health & Safety), Université Bretagne Loire, Ploufragan, France
| | - Claire Chauvin
- Ploufragan-Plouzané Laboratory, ANSES (French Agency for Food, Environmental and Occupational Health & Safety), Université Bretagne Loire, Ploufragan, France
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11
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Iwu CJ, Iweriebor BC, Obi LC, Basson AK, Okoh AI. Multidrug-Resistant Salmonella Isolates from Swine in the Eastern Cape Province, South Africa. J Food Prot 2016; 79:1234-9. [PMID: 27357044 DOI: 10.4315/0362-028x.jfp-15-224] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The exposure of farm animals to antimicrobials for treatment, prophylaxis, or growth promotion can select for resistant bacteria that can be transmitted to humans, and Salmonella as an important zoonotic pathogen can act as a potential reservoir of antimicrobial resistance determinants. We assessed the antibiogram profiles of Salmonella species isolated from pig herds in two commercial farms in South Africa. Two hundred fifty-eight presumptive Salmonella isolates were recovered from the fecal samples of 500 adult pigs. Specific primers targeting Salmonella serogroups A, B, C1, C2, and D were used to determine the prevalence of different serogroups. Only serogroup A (n = 48) was detected, while others were not. Antimicrobial susceptibility of the confirmed Salmonella serogroup A isolates was performed by using the disk diffusion method against a panel of 18 antibiotics. All the 48 isolates were resistant to tetracycline and oxytetracycline, while 75% were resistant to ampicillin, sulphamethoxazole-trimethoprim, nalidixic acid, and streptomycin. All the isolates exhibited multidrug resistance, with the predominant phenotype being against 11 antibiotics, and multiple antibiotic resistance index ranged between 0.3 and 0.6. The incidence of genes encoding resistance against ampicillin (ampC), tetracycline (tetA), and streptomycin (strA) were 54, 61, and 44%, respectively. We conclude that healthy pigs are potential reservoirs of multidrug-resistant Salmonella that could be transmitted to humans through the food chain and, hence, a significant public health threat.
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Affiliation(s)
- Chinwe Juliana Iwu
- South African Medical Research Council Microbial Water Quality Monitoring Centre, , University of Fort Hare, Alice 5700, Eastern Cape, South Africa; Applied and Environmental Microbiology Research Group, Department of Biochemistry and Microbiology, University of Fort Hare, Alice 5700, Eastern Cape, South Africa.
| | - Benson Chuks Iweriebor
- South African Medical Research Council Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice 5700, Eastern Cape, South Africa;Applied and Environmental Microbiology Research Group, Department of Biochemistry and Microbiology, University of Fort Hare, Alice 5700, Eastern Cape, South Africa
| | - Larry Chikwelu Obi
- Academic and Research Division, University of Fort Hare, Alice 5700, Eastern Cape, South Africa
| | - Albertus Kotze Basson
- Department of Biochemistry and Microbiology, University of Zululand, KwaDlangezwa, 3886, South Africa
| | - Anthony Ifeanyi Okoh
- South African Medical Research Council Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice 5700, Eastern Cape, South Africa; Applied and Environmental Microbiology Research Group, Department of Biochemistry and Microbiology, University of Fort Hare, Alice 5700, Eastern Cape, South Africa
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12
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Prevalence and characterization of Salmonella in pigs from conventional and organic farms and first report of S. serovar 1,4,[5],12:i:- from Korea. Vet Microbiol 2015; 178:119-24. [DOI: 10.1016/j.vetmic.2015.05.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Revised: 04/24/2015] [Accepted: 05/05/2015] [Indexed: 11/23/2022]
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13
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Tamang MD, Gurung M, Nam HM, Moon DC, Jang GC, Jung SC, Lim SK. Antimicrobial susceptibility and virulence characteristics of Salmonella enterica Typhimurium isolates from healthy and diseased pigs in Korea. J Food Prot 2014; 77:1481-6. [PMID: 25198838 DOI: 10.4315/0362-028x.jfp-14-084] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
This study compared the antimicrobial susceptibility and prevalence of virulence genes in Salmonella enterica Typhimurium isolated from healthy and diseased pigs in Korea. A total of 456 Salmonella Typhimurium isolated from healthy (n = 238) and diseased (n = 218) pigs between 1998 and 2011 were investigated. In total, 93.4% of the Salmonella Typhimurium isolates were resistant to at least one antimicrobial agent tested. The isolates were most often resistant to tetracycline (85.7%), followed by streptomycin (83.6%), nalidixic acid (67.3%), ampicillin (49.3%), chloramphenicol (42.8%), and gentamicin (37.1%). Moreover, multidrug resistance phenotype and resistance to ampicillin, florfenicol, gentamicin, nalidixic acid, neomycin, streptomycin, and tetracycline were significantly higher (P < 0.01) among Salmonella Typhimurium isolates from the diseased pigs compared with those from the healthy pigs. The most common resistance pattern observed in both groups of isolates was streptomycin-tetracycline. Overall, more than 96% of the isolates tested possessed invA, spiA, msgA, sipB, prgH, spaN, tolC, lpfC, sifA, sitC, and sopB virulence genes. The prevalence of orgA, pagC, and iroN were 50.2, 74.1, and 91.0%, respectively, whereas isolates carrying cdtB (1.5%), pefA (7.0%), and spvB (14.9%) were identified much less frequently. Furthermore, the prevalence of invA, lpfC, orgA, pagC, and iroN was significantly higher (P < 0.01) among the isolates from the diseased pigs than in isolates from the healthy pigs. Our results demonstrated that, among diseased pigs, there was significantly higher resistance to some antimicrobials and greater prevalence of some virulence genes than in healthy pigs, indicating the role these factors play in pathogenesis. Multidrug-resistant Salmonella isolates that carry virulence-associated genes are potentially more dangerous and constitute a public health concern. Thus, continuous surveillance of antimicrobial resistance and virulence characteristics in Salmonella is essential.
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Affiliation(s)
- Migma Dorji Tamang
- Bacterial Disease Division, Animal and Plant Quarantine Agency, 175 Anyang-ro, Anyang-6 dong, Manan-gu, Anyang, Gyeonggi-do, 430-757, Republic of Korea
| | - Mamata Gurung
- Bacterial Disease Division, Animal and Plant Quarantine Agency, 175 Anyang-ro, Anyang-6 dong, Manan-gu, Anyang, Gyeonggi-do, 430-757, Republic of Korea
| | - Hyang-Mi Nam
- Bacterial Disease Division, Animal and Plant Quarantine Agency, 175 Anyang-ro, Anyang-6 dong, Manan-gu, Anyang, Gyeonggi-do, 430-757, Republic of Korea
| | - Dong Chan Moon
- Bacterial Disease Division, Animal and Plant Quarantine Agency, 175 Anyang-ro, Anyang-6 dong, Manan-gu, Anyang, Gyeonggi-do, 430-757, Republic of Korea
| | - Geum-Chan Jang
- Bacterial Disease Division, Animal and Plant Quarantine Agency, 175 Anyang-ro, Anyang-6 dong, Manan-gu, Anyang, Gyeonggi-do, 430-757, Republic of Korea
| | - Suk-Chan Jung
- Bacterial Disease Division, Animal and Plant Quarantine Agency, 175 Anyang-ro, Anyang-6 dong, Manan-gu, Anyang, Gyeonggi-do, 430-757, Republic of Korea
| | - Suk-Kyung Lim
- Bacterial Disease Division, Animal and Plant Quarantine Agency, 175 Anyang-ro, Anyang-6 dong, Manan-gu, Anyang, Gyeonggi-do, 430-757, Republic of Korea.
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14
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Argüello H, Sørensen G, Carvajal A, Baggesen DL, Rubio P, Pedersen K. Characterization of the EmergingSalmonella4,[5],12:i:- in Danish Animal Production. Foodborne Pathog Dis 2014; 11:366-72. [DOI: 10.1089/fpd.2013.1672] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Hector Argüello
- Infectious Diseases and Epidemiology Unit, Department of Animal Health, Faculty of Veterinary Science, University of León, León, Spain
| | - Gitte Sørensen
- Technical University of Denmark, National Food Institute, Søborg, Denmark
| | - Ana Carvajal
- Infectious Diseases and Epidemiology Unit, Department of Animal Health, Faculty of Veterinary Science, University of León, León, Spain
| | - Dorte Lau Baggesen
- Technical University of Denmark, National Food Institute, Søborg, Denmark
| | - Pedro Rubio
- Infectious Diseases and Epidemiology Unit, Department of Animal Health, Faculty of Veterinary Science, University of León, León, Spain
| | - Karl Pedersen
- Technical University of Denmark, National Food Institute, Søborg, Denmark
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15
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Palhares JCP, Kich JD, Bessa MC, Biesus LL, Berno LG, Triques NJ. Salmonella and antimicrobial resistance in an animal-based agriculture river system. THE SCIENCE OF THE TOTAL ENVIRONMENT 2014; 472:654-661. [PMID: 24317171 DOI: 10.1016/j.scitotenv.2013.11.052] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2013] [Revised: 10/11/2013] [Accepted: 11/09/2013] [Indexed: 06/02/2023]
Abstract
The aim of this study was to examine the Salmonella serovars and antimicrobial resistance within an animal-based agriculture river system. The study area consisted of a 1,345 ha upper part of Pinhal catchment. A total of 384 samples were collected in four years of monitoring. Salmonella was isolated from 241 samples (62.7%), resulting in 324 isolates. The highest number of Salmonella sp. occurred in samples associated with sites with high stoking density animal unit per hectare. It was possible to demonstrate the variability of serovars in the study area: 30 different serovars were found and at least 11 per monitoring site. Thirty-three potentially related isolates were genotyped by PFGE, one major clone was observed in serovar Typhimurium, which occurred in animal feces (swine and bovine), and different sites and samplings proving the cross-contamination and persistence of this specific clone. Among 180 isolates submitted to an antimicrobial susceptibility test, 50.5% were susceptible to all 21 antimicrobials tested and 54 different profiles were found. In the current study, 49.5% of the tested isolates were resistant to at least one antimicrobial, and multi-resistance occurred in 18% of isolates. Results indicate a close interaction between animal-based agriculture, Salmonella, and antimicrobial resistance.
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Affiliation(s)
| | | | - Marjo C Bessa
- Pontifical Catholic University of Rio Grande do Sul, Brazil
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16
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Lim SK, Nam HM, Lee HS, Kim AR, Jang GC, Jung SC, Kim TS. Prevalence and characterization of apramycin-resistant Salmonella enterica serotype Typhimurium isolated from healthy and diseased pigs in Korea during 1998 through 2009. J Food Prot 2013; 76:1443-6. [PMID: 23905803 DOI: 10.4315/0362-028x.jfp-13-069] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Apramycin resistance was observed in 22.8% (81 of 355) of Salmonella Typhimurium isolates collected from pigs from 1998 through 2009 in Korea. All apramycin-resistant Salmonella Typhimurium isolates also were cross-resistant to gentamicin and tobramycin. Among the seven types of aminoglycoside resistance genes tested, only four types were detected in the apramycin-resistant Salmonella Typhimurium isolates: aac (3)-IV, aac (3)-II, aac (3)-III, and ant (2'')-I. Although the aac (3)-IV gene was found in all apramycin-resistant Salmonella Typhimurium isolates, aac (3)-II, aac (3)-III, and ant (2'')-I genes were detected in five (6.2%), two (2.5%), and three (3.7%) isolates, respectively. The apramycin-resistant isolates comprised six phage types, of which PT193 (16 of 81 isolates, 19.8%) was most commonly observed. To our knowledge, this is the first report describing characteristics of apramycin-resistant Salmonella Typhimurium isolates in Korea. Further study is warranted to determine whether apramycin use in animals results in cross-resistance to gentamicin, which may affect public health when gentamicin is required for disease treatment in humans.
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Affiliation(s)
- Suk-Kyung Lim
- Animal, Plant, and Fisheries Quarantine and Inspection Agency, 175 Anyang-ro, Manan-gu, Anyang 430-757, Republic of Korea.
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17
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Prevalence, characterization and antimicrobial susceptibility of Salmonella enterica and Yersinia enterocolitica in pigs at slaughter in Italy. Int J Food Microbiol 2013; 163:248-57. [DOI: 10.1016/j.ijfoodmicro.2013.02.012] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2012] [Revised: 02/08/2013] [Accepted: 02/22/2013] [Indexed: 11/24/2022]
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18
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19
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Vico JP, Rol I, Garrido V, San Román B, Grilló MJ, Mainar-Jaime RC. Salmonellosis in finishing pigs in Spain: prevalence, antimicrobial agent susceptibilities, and risk factor analysis. J Food Prot 2011; 74:1070-8. [PMID: 21740708 DOI: 10.4315/0362-028x.jfp-10-515] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A herd-based survey of Salmonella in pigs was carried in a major pig producing region of Spain. Mesenteric lymph nodes were collected from the carcasses of 25 pigs from each of 80 herds at time of slaughter. Salmonella spp. were isolated from 31% of animals and 94% of herds. Within-herd prevalence ranged from 4 to 88%, with the prevalence in most herds being greater than 10%. A large diversity of Salmonella serotypes was found, with Typhimurium, 4,[5],12:i:-, and Rissen being the most prevalent. Two or more serotypes coexisted in 73% of the herds. Salmonella Typhimurium was present in 68% of the herds. Most (82%) of the Salmonella isolates belonged to serogroups targeted by enzyme-linked immunosorbent assay tests for pig salmonellosis. Resistance to at least one antimicrobial agent was detected in 73% of the strains, and one or more resistant strains were recovered from pigs in 93% of the herds. Antimicrobial agent resistance (AR) was more frequent among the most prevalent than it was among the rarer serotypes. Twenty-five multi-AR patterns were found. Resistance to three or more families of antimicrobial agents was found in 75% of AR strains. The finding that many of the herds yielded isolates of several multi-AR patterns indicates that Salmonella infections were acquired from multiple sources. High prevalence of Salmonella in herds was associated with lack of rodent control programs, herds from farms with only finishing pigs, herds managed by more than one full-time worker, herds for which the source of drinking water was not a city supply, and relatively long fattening times.
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Affiliation(s)
- J P Vico
- Centro de Investigación y Tecnología Agroalimentaria de Aragón, Ctra. de Montañana, 930, 50059 Zaragoza, Spain
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Miller AJ, Twomey DF, Davies RH, Teale CJ, Williamson SM, Reichel R, Featherstone CA, Cook AJC, Snow LC, Armstrong JD. Salmonella serovars and antimicrobial resistance patterns on a sample of high seroprevalence pig farms in England and Wales (2003-2008). Zoonoses Public Health 2011; 58:549-59. [PMID: 21824355 DOI: 10.1111/j.1863-2378.2011.01402.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Following the introduction of a national abattoir-based monitoring programme for Salmonella in pigs, advisory visits were made to pig farms in England and Wales with high Salmonella seroprevalence assessed by muscle tissue fluid (meat juice) ELISA. Samples (n = 15 790), including pooled pen floor faeces (n = 12 136), were collected for Salmonella culture from 296 farms, between October 2003 and February 2008. Salmonella was isolated from 4489 (28%) of all samples collected, including 3301 (27%) of pooled pen floor faecal samples, from 270 (91%) of farms visited. Salmonella Typhimurium and S. Derby were the most prevalent serovars, representing 64% and 16% of isolates serotyped, respectively. The main phage types of S. Typhimurium identified were U288 and DT193. Antimicrobial resistance (AMR) was seen in 92% of isolates tested, with the highest frequencies of resistance occurring to tetracyclines (T), sulphonamide compounds (SU), ampicillin (AM), sulphamethoxazole/trimethoprim (SXT), streptomycin (S) and chloramphenicol (C). Fifty-nine AMR patterns were observed, the most frequent of these being T, AM, SXT, C, S, SU, seen in 35% of isolates tested. Multi-drug resistance was commonly found, with 67% of isolates submitted for AMR testing showing resistance to between four and nine antimicrobials.
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Affiliation(s)
- A J Miller
- Veterinary Laboratories Agency, Surrey, UK
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21
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Choi MJ, Lim SK, Nam HM, Kim AR, Jung SC, Kim MN. Apramycin and Gentamicin Resistances in Indicator and Clinical Escherichia coli Isolates from Farm Animals in Korea. Foodborne Pathog Dis 2011; 8:119-23. [DOI: 10.1089/fpd.2010.0641] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Min-Jung Choi
- Department of Biology, Sangmyung University, Seoul, Republic of Korea
| | - Suk-Kyung Lim
- National Veterinary Research and Quarantine Service, Ministry of Food, Agriculture and Forestry and Fisheries, Anyang, Republic of Korea
| | - Hyang-Mi Nam
- National Veterinary Research and Quarantine Service, Ministry of Food, Agriculture and Forestry and Fisheries, Anyang, Republic of Korea
| | - Ae-Ran Kim
- National Veterinary Research and Quarantine Service, Ministry of Food, Agriculture and Forestry and Fisheries, Anyang, Republic of Korea
| | - Suk-Chan Jung
- National Veterinary Research and Quarantine Service, Ministry of Food, Agriculture and Forestry and Fisheries, Anyang, Republic of Korea
| | - Mal-Nam Kim
- Department of Biology, Sangmyung University, Seoul, Republic of Korea
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22
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Scientific Opinion on monitoring and assessment of the public health risk of “SalmonellaTyphimurium-like” strains. EFSA J 2010. [DOI: 10.2903/j.efsa.2010.1826] [Citation(s) in RCA: 102] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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23
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Lim SK, Lee HS, Nam HM, Jung SC, Koh HB, Roh IS. Antimicrobial Resistance and Phage Types of Salmonella Isolates from Healthy and Diarrheic Pigs in Korea. Foodborne Pathog Dis 2009; 6:981-7. [DOI: 10.1089/fpd.2009.0293] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Suk-Kyung Lim
- National Veterinary Research and Quarantine Service, Anyang, Republic of Korea
| | - Hee-Soo Lee
- National Veterinary Research and Quarantine Service, Anyang, Republic of Korea
| | - Hyang-Mi Nam
- National Veterinary Research and Quarantine Service, Anyang, Republic of Korea
| | - Suk-Chan Jung
- National Veterinary Research and Quarantine Service, Anyang, Republic of Korea
| | - Hong-Bum Koh
- Department of Veterinary Microbiology, Chonnam National University, Gwangju, Republic of Korea
| | - In-Soon Roh
- National Veterinary Research and Quarantine Service, Anyang, Republic of Korea
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24
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Salmonella entericaserotypes and antibiotic susceptibility in New Zealand, 2002–2007. Epidemiol Infect 2009; 138:322-9. [DOI: 10.1017/s0950268809990458] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
SUMMARYWe analysed the serotypes and antibiotic susceptibility of 1560 human and 1505 non-humanSalmonellaisolated in New Zealand (NZ) between 2002 and 2007. The most common serotypes in humans wereSalmonella entericaserovar Typhimurium,S. Enteritidis,S. Brandenburg andS. Infantis. Over the 6-year period human cases due toS. Agona andS. Enteritidis increased and cases due toS. Typhimurium decreased. The most common serotypes from non-human sources wereS. Typhimurium,S. Brandenberg,S. Hindmarsh andS. Infantis, and there were no significant changes over time. More isolates were non-susceptible to streptomycin than to any other antibiotic. Almost all isolates were susceptible to ciprofloxacin and gentamicin. There were significant trends of increasing non-susceptibility to streptomycin and sulfonamides in isolates from human and non-human sources, while ampicillin, tetracycline and multidrug non-susceptibility also increased in human isolates. Despite these increases, rates of antibiotic non-susceptibility inSalmonellain NZ are still lower than in many international settings.
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