Abstract
The study was conducted to clarify the prevalence and antibiotic resistance of Salmonella in chickens and environment in some households in Vinh Long province. A total of 322 samples (127 fecal samples and 195 environmental samples) were collected from three households in Vinh Long province for isolation and antibiotics resistance testing by disk diffusion method. The results showed that 20 positive samples were Salmonella. The positive Salmonella isolated from feces (9.45%) was higher than that from environmental samples (4.10%). Salmonella was isolated from diarrheic chickens (8/44 samples, 18.18%) higher than from healthy chickens (4/83, 4.82%); mainly in 1-2 weeks of age (17.31%, 9/52 samples). Salmonella isolation in the cage with 10.71% was higher than that in the drinking water samples (1.96%) and feed (1.14%). The results of antibiogtic resistance to 14 antibiotics showed that these strains were resistant to 2 – 10 antibiotics. Salmonella had a high resistance to ampicillin (100%), chloramphenicol (95%), cefuroxime, streptomycin, tetracycline (90%), doxycycline (85%) and moderate resistance to trimethoprim/sulfamethoxazole (60%). These strains are still highly sensitive to amoxicillin/clavulanic acid, amikacin, levofloxacin, ofloxacin (100%), ceftazidime (95%) and colistin (75%). All 20 strains were multi-resistant with 11 different multi-resistant types in very diverse and complicate phenotypes.
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