Longitudinal study reveals persistent environmental Salmonella Heidelberg in Brazilian broiler farms
| Autor: | Clarissa Silveira Luiz Vaz, Raquel Rebelatto, V. S. Silva, Daiane Voss-Rech, Paulo G. de Abreu, Arlei Coldebella, B. Kramer |
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| Přispěvatelé: | DAIANE VOSS RECH, CNPSA, BEATRIS KRAMER, CNPSA, VIRGINIA SANTIAGO SILVA, CNPSA, PAULO GIOVANNI DE ABREU, CNPSA, ARLEI COLDEBELLA, CNPSA, CLARISSA SILVEIRA LUIZ VAZ, CNPSA. |
| Rok vydání: | 2019 |
| Předmět: |
Litter (animal)
Veterinary medicine Salmonella Genotype animal diseases Biology Serogroup medicine.disease_cause Microbiology Poultry 03 medical and health sciences Environmental Microbiology Prevalence medicine Animals Longitudinal Studies Animal Husbandry Poultry Diseases 030304 developmental biology Salmonella Infections Animal 0303 health sciences General Veterinary 030306 microbiology business.industry Salmonella Heidelberg Broiler General Medicine Poultry farming Contamination Housing Animal Flock business Chickens Brazil |
| Zdroj: | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA-Alice) Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
| ISSN: | 0378-1135 |
| Popis: | The vast capacity for maintenance and dissemination in the environment are major challenges for the control of Salmonella spp. in poultry farms. The aim of this study was to assess environmental contamination by nontyphoidal Salmonella in successive broiler flocks in nine commercial broiler farms integrated with three companies in the south of Brazil, for a twelve-month production period. Recycled broiler litter, feed and swabs from the evaporative cooling system pads were analyzed, and the total enterobacteria count in the litter samples was ascertained. Positive broiler houses were identified in two of the three broiler companies studied, in which nontyphoidal Salmonella were detected for the first time in the first or second flock, and recurred in the recycled litter of subsequent flocks. Feed and evaporative cooling pad swab samples were also positive in at least one of the assessed flocks. The majority of the isolates (87.5%) originating from different flocks, broiler houses and companies that were sampled were identified as S. Heidelberg, with the prevalence of one single genotype. The total enterobacteria levels in the litter diminished as the flocks progressed, but the presence of Salmonella spp. was constant over the course of time, indicating that the litter management procedures were not capable of interrupting the cycle of residual contamination. The predominance of S. Heidelberg highlights its emergence and dissemination in this region, as well as its resistance and maintenance in the environment, and reinforces the need to improve prevention and recycled litter management measures. Made available in DSpace on 2019-11-04T18:11:46Z (GMT). No. of bitstreams: 1 final9057.pdf: 1748574 bytes, checksum: 8d934aa119670b291408db1f1fbc6c90 (MD5) Previous issue date: 2019 |
| Databáze: | OpenAIRE |
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