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ID 33887
file
creator
Hammad, Ahmed M.
subject
antibiotic resistance
Gram-negative bacteria
udder
NDC
Animal husbandry
abstract
Nonpathogenic and opportunistic bacteria are increasingly recognized as reservoirs of antibiotic resistance genes. However, nothing is known about the mechanisms of antibiotic resistance in such bacteria isolated from the udders of healthy animals. In this study, 150 Gram-negative strains isolated from milk samples of healthy dairy cows were screened for the presence of a large pool of antibiotic resistance markers. Strains carrying β-lactamase-resistance genes, including SHV-1, SHV-11, SHV-27, TEM-1, OXY-1, CTX-M-2 and class 1 integrons, were detected. Our findings give the first evidence that nonpathogenic and opportunistic bacteria carrying antibiotic resistance genes can asymptomatically invade healthy udders and suggest that they may play a role in the dissemination of antibiotic resistance genes to the other udder pathogens.
journal title
Journal of Veterinary Medical Science
volume
Volume 73
issue
Issue 8
start page
1089
end page
1092
date of issued
2011-08-30
publisher
公益社団法人日本獣医学会
issn
0916-7250
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 2011 by the Japanese Society of Veterinary Science
relation url
department
Graduate School of Biosphere Science