Determination of antibiotic susceptibility of Salmonella spp isolated from infected ducklings in Son Tinh district, Quang Ngai province

Abstract

The result of investigating typhoid situation in the duck flocks raising in Son Tinh district, Quang Ngai province showed that the rate of infection ducks was 18.22% (3634/19950). From 118 duckling samples suspecting with typhoid, 80 samples were isolated to be positive with Salmonella, reaching 67.80%. All of 8 virulent Salmonella strains were performed to kill the experimental mice within 24 hours in challenge test. These bacteria strains were highly susceptible with cefotaxime, rifampin and medium susceptible with gentamycin, colistin, kanamycin, ampicillin, streptomycine, cephalexin. Meanwhile, 100% of the tested Salmonella strains were resistant to tetracycline and neomycin. From the above studied results, some medicines were used for field treatment of the typhoid infection ducks. As a result, 86.04% (74/86) ducks were recovered in the cases of using cefotaxime, meanwhile 88.66% (86/97) of the cases were recovered with ceftiofur. Thus, 2 medicines: cefotaxime and ceftiofur can be used for treatment of the typhoid ducks to obtain high treatment efficiency.