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Effects of enrofloxacin treatment on the bacterial microbiota of milk from goats with persistent mastitis
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Effects of enrofloxacin treatment on the bacterial microbiota of milk from goats with persistent mastitis
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Journal Article
Effects of enrofloxacin treatment on the bacterial microbiota of milk from goats with persistent mastitis
2020
Overview
Antibiotic resistance has become a major concern for human and animal health. As fluoroquinolones have been extensively used in human and veterinary medicine, there has also been the rapid emergence and spread of antimicrobial resistance around the world. Here, we analysed the microbiome of goat milk using samples from healthy goats and those diagnosed with persistent mastitis and treated using the antibiotic enrofloxacin with 16S rRNA amplicon sequencing. We selected a group of 11 goats and 22 samples of milk that did not respond clinically to enrofloxacin treatment. Milk samples were evaluated before and after treatment to verify changes of the microbiota; the three first lactating goats were selected from the healthy control group. The milk samples from the healthy control animals presented a larger abundance of different species of bacteria of the
Staphylococcus
genus, but a smaller number of different genera, which indicated a more specific niche of resident bacteria. The
Firmicutes
phylum was predominantly different between the studied groups. Samples from before-treatment animals had a higher number of new species than those from the control group, and after being treated again. These microbiota received new bacteria, increasing the differences in bacteria even more in relation to the control group. Genotypes such as
Trueperella
and
Mannheimia
, between other genera, had a high abundance in the samples from animals with persistent mastitis. The dysbiosis in this study, with marked evidence of a complex microbiota in activity in cases of the failure of antimicrobial treatment for persistent chronic mastitis, demonstrates a need to improve the accuracy of pathogen identification and increases concern regarding antibiotic treatments in milk production herds.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
/ 38/77
/ 45/43
/ Animals
/ Anti-Bacterial Agents - administration & dosage
/ Anti-Bacterial Agents - pharmacology
/ Bacteria
/ Bacteria - isolation & purification
/ DNA, Bacterial - drug effects
/ Enrofloxacin - administration & dosage
/ Female
/ Goat Diseases - drug therapy
/ Goats
/ Humanities and Social Sciences
/ Mastitis
/ Niches
/ RNA, Ribosomal, 16S - genetics
/ rRNA 16S
/ Science
