Antibiotic resistance of Enterobacteriaceae genera and Salmonella spp., Salmonella enterica ser. typhimurium and enteritidis isolated from milk, cheese and other dairy products from conventional farm in Slovakia.
2011
Antibiotic resistance was investigated in 67 samples of Enterobacteriaceae genera
isolates from milk, cheese and other dairy products in this work. The samples were obtained
from conventional farms in Slovakia. Four samples of isolates were positive for Salmonella
spp., Salmonella enterica ser. typhimurium and enteritidis. A great proportion of resistant
strain from Enterobacteriaceae genera was found. There was detected a high resistance in
milk samples to ampicillin (57.14%), to streptomycin and tetracycline (14.28%), to
chloramphenicol (9.52%). Bacteria from the cheese samples were resistant to ampicillin
(84.0%), to tetracycline (24.0%). In the samples of other dairy products was found resistance
to ampicillin (66.66%), to tetracycline (52.38%) and to streptomycin (14.28%). Among all
samples observed, it was found resistance to ampicillin (69.26%), tetracycline (30.22%),
streptomycin (9.52%) and to chloramphenicol (3.17%). Resistance to other antibiotics was not
detected. From all observed samples we detected Salmonella spp. in 5.97 %, Salmonella spp.
was found in dairy samples in 19.04 %. Antibiotic resistance was investigated in 13 colonies
of Salmonella spp. as well. The highest resistance was to tetracycline (30.76 %), ampicillin
and tigecycline (23.07 %), to piperacillin (15.38 %) and chloramphenicol (7.69 %).
Resistance to the other monitored antibiotics was not detected. High number of antibiotic
resistant Enterobacteriaceae genera and Salmonella spp. was found in milk, cheese and other
dairy products from conventional breeding and it is indicating the need for prudent drugs
using to diminish development and to avoid spread of antibiotic resistance.
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