%T Prevalence of antibiotic resistance genes of Escherichia coli at the pig
%T  slaughterhouses in the Mekong Delta
%A Ngo Van Thong
%V The  study  was  conducted  to  determine  the  antimicrobial  susceptib
%V ility  and  antibiotic-resistance  genes  of Escherichia coliat thepig s
%V laughterhouses in the Mekong Delta, Vietnam. A total of 60 samples were 
%V collected at the slaughterhouse in the Mekong Delta, including24 feces, 
%V 24 carcasses,8 floors, and 4 wastewater samples.The prevalence of E. col
%V iin feces, wastewater, carcasses, and floor samples was 91.67%, 50.00%, 
%V 29.17%, and 25.00%,respectively. A total of 79E. coliisolateswere examin
%V ed for antimicrobial susceptibility to15antibiotics usingthe  disc  diff
%V usion  method according  to  CLSI  2021  guidelines.E.  colistrainswere 
%V  highly  resistant  to amoxicillin (83.54%), ampicillin (78.48%), strept
%V omycin(63.29%),and florfenicol (63.29%). However, thoseE. colistrainswer
%V esensitive  to amoxicillin+  acid  clavulanic  and amikacin  (97.47%),ce
%V faclor  (95.45%),cefuroxime (93.67%), and enrofloxacin (92.41%). The res
%V ults showed that 96.2% ofexaminedE. colistrains were resistant from one 
%V antibiotic to eight antibiotics, and the most frequent multidrug-resista
%V nce phenotype wasamoxicillin+ampicillin+florfenicol+ streptomycin(13.92%
%V ). The prevalence of antibioticresistance genes (strA, sulII, qnrA, tetA
%V , blaampC,  blaTEM,  and  blaCTX-M)in E.  coliwas  determined  by  PCR. 
%V  The  prevalence  of strA,  sulII,  qnrA, tetA, blaampC,andblaTEMgenes i
%V n E. colistrainswas75.67%, 72.97%, 75.67%, 83.78%, 91.89%, and83.78% res
%V pectively;  however, blaCTX-Mgene  was  not detected.Therefore,  the  co
%V ntamination  of E.  coliexhibiting antibiotic resistance in pig slaughte
%V rhouses should be controlled to prevent public health.
%I Faculty of Veterinary Medicine, ChiangMai Universitity
%K Antimicrobial resistance
%K Escherichia coli
%K Mekong Delta
%K Pig
%K Slaughterhouse
%V https://he02.tci-thaijo.org/index.php/vis/issue/view/18403
%D 2025
%V Veterinary Integrative Sciences 23, 1 (Jan-Apr 2025), 1-10
%V 2629-9968
%0 CMU e-Journals Article