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Presence of tetracycline resistant bacteria and genes in grassland-based animal production systems.

dc.contributoren-US
dc.creatorLópez, Liliana
dc.creatorSantamaría, Johanna
dc.creatorSánchez, Alexandra
dc.creatorCastro, Lida
dc.creatorMoreno, Jessica L.
dc.date2012-09-01
dc.date.accessioned2021-01-18T16:29:50Z
dc.date.available2021-01-18T16:29:50Z
dc.identifierhttps://www.rcia.uc.cl/index.php/ijanr/article/view/31
dc.identifier.urihttps://revistaschilenas.uchile.cl/handle/2250/161866
dc.descriptionL. López, J. Santamaría, A. Sánchez, L. Castro, and J.L. Moreno. 2012. Presence of tetracycline resistant bacteria and genes in grassland-based animal production systems. Cien. Inv. Agr. 39(3): 411-423. This study assessed the presence of tetracycline-resistant bacteria in five different grassland-based production systems dedicated to raising dairy cattle located in the Colombian Andes. Animal (ruminal fluid and feces) and environmental (soil and water) samples were evaluated, and resistant heterotrophic bacteria were found in rumen fluid, feces, soil, and runoff water samples. The resistant bacteria were isolated and identified based on the 16S rDNA region. Subsequently, they were evaluated for the presence of tet genes, which encode ribosomal protection proteins and membrane efflux pumps. The most frequent phyla detected were Firmicutes and Proteobacteria. The most common resistance genes found were tet(W), tet(Q), and tet(M). The nucleotide sequences of the genes showed no differences in bacteria isolated from environmental samples versus ruminal fluid and feces. This result suggests that the observed environmental resistance in the evaluated grasslands is the result of horizontal gene transfer from animals to the environment.en-US
dc.format
dc.languageeng
dc.publisherPontificia Universidad Católica de Chileen-US
dc.relationhttps://www.rcia.uc.cl/index.php/ijanr/article/view/31/6
dc.sourceInternational Journal of Agriculture and Natural Resources; Vol 39, No 3 (2012); 411-423en-US
dc.sourceInternational Journal of Agriculture and Natural Resources; Vol 39, No 3 (2012); 411-423es-ES
dc.source2452-5731
dc.source2452-5731
dc.subjecten-US
dc.subjectAntimicrobial resistance, cattle farms, Colombian Andes, environmental pollution, tetracyclineen-US
dc.titlePresence of tetracycline resistant bacteria and genes in grassland-based animal production systems.en-US
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion
dc.typeen-US
dc.typees-ES


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