First detection and characterization of Salmonella spp. In poultry and swine raised in backyard production systems in central Chile

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dc.contributor.authorAlegria-Moran, R.
dc.contributor.authorRivera, D.
dc.contributor.authorToledo, V.
dc.contributor.authorMoreno-Switt, A.I.
dc.contributor.authorHamilton-West, C.
dc.date.accessioned2023-11-15T15:22:07Z
dc.date.available2023-11-15T15:22:07Z
dc.date.issued2017-11
dc.descriptionIndexación: Scopuses
dc.description.abstractLittle 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. Copyright © Cambridge University Press 2017.es
dc.description.uri
dc.description.urihttps://www-cambridge-org.recursosbiblioteca.unab.cl/core/journals/epidemiology-and-infection/article/first-detection-and-characterization-of-salmonella-spp-in-poultry-and-swine-raised-in-backyard-production-systems-in-central-chile/CF2DE73F716B8543FA8FCF2ECBCAD0B5
dc.identifier.citationEpidemiology and Infection Volume 145, Issue 15, Pages 3180 - 31901 November 2017es
dc.identifier.doi10.1017/S0950268817002175
dc.identifier.issn0950-2688
dc.identifier.urihttps://repositorio.unab.cl/xmlui/handle/ria/53970
dc.language.isoenes
dc.publisherCambridge University Presses
dc.rights.licenseCC BY 4.0 DEED
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/deed.es
dc.subjectBackyard production systemses
dc.subjectSalmonella sppes
dc.subjectSerotypificationes
dc.subjectSurveillancees
dc.subjectZoonotic agentses
dc.titleFirst detection and characterization of Salmonella spp. In poultry and swine raised in backyard production systems in central Chilees
dc.typeArtículoes
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