Journal of Bacteriology & Parasitology

Antibiotic and disinfectant resistance of Salmonella from retail meats in China

3^rd International Congress on Bacteriology and Infectious Diseases

August 04-06, 2015 Valencia, Spain

Likou Zou

Scientific Tracks Abstracts: J Bacteriol Parasitol

Abstract:

Salmonella is a leading cause of food borne illnesses and deaths worldwide. The frequent use of antibiotic and disinfectant
in food production and processing may have imposed a selective pressure and contributed to the emergence of resistant
microbes. However, little information is available regarding the antibiotic and disinfectant resistance of Salmonella isolates
from retail meats in China. Salmonella isolates were recovered from chicken, beef and pork purchased from selected
supermarket. Antibiotic susceptibility was tested according to the standard disk diffusion method. The MICs of disinfectants
were determined using the agar dilution method. All isolates were screened for the presence of disinfectant resistance genes
and further analyzed for genetic relatedness by PFGE. The predominant serotype was Salmonella Derby (34.8%) followed by S.
Enteritidis (12.3%) and S. Rissen (9.0%). Overall, 82.8% isolates were resistant to OTC, 66.3% to TMP, 28.8% to AMX, 23.9% to
AMP, 20.3% to LEV, 11.7% to GEN, 11.7% to EFT, 15.3% to CIP and 3.7% to AMC respectively. The MICs of the disinfectants
cetyltrimethylammonium bromide and cetylpyridinium chloride were 8-128 mg/L and 8-256 mg/L. The qac and sugE(p) gene
was found less prevalent (0.0% to 14.7%). Up to 71 distinct PFGE types were identified among the 163 Salmonella isolates.
PFGE revealed that the resistant isolates were associated with the sampling supermarkets or groceries. Salmonella can serve
as a critical vector in spreading disinfectant and antibiotic resistance. The use of disinfectant in food processing environments
may have played a role in the emergence of antibiotic and disinfectant resistant bacteria.

Biography :

Likou Zou has completed his PhD at the age of 28 years from Sichuan Agricultural University and Postdoctoral studies from Sichuan University School of Life
Science. He is the Director of Lab of Microbiology, Dujiangyan Campus of Sichuan Agricultural University. He has published more than 20 papers in reputed journals
and has been serving as an Editorial Board Member of Journal of Sichuan Agricultural University.