Epidemiological characteristics and multidrug resistantce of 153 Salmonella strains isolated in Beijing

Objective To understand the multidrug resistant(MDR)and epidemiological characteristics of 153 Salmonella strains isolated in Beijing.Methods A total of 153 isolates recovered from the WHO Global Salmonella Surveillance system and enteroclinic Surveillance system were identified by biochemical tests and serotyping,Antimicrobial resistance was tested using the Kirby-Bauer method.Results Sixty-one out of the 153 Salmonella strains were multidrug resistant(39.87%),Salmonella enteritidis and Salmonella typhimurium were the main multidrug resistant serotypes.Thirty-four strains(55.74%)were resisted to four or five antibiotics,the main resistance pattern was resistant to five antibioticsiinclusing ampicillin,streptomycin,sulphafurazole,nalidixic acid,tetracyclin,accounting for 27.87%(17 / 61).The ratio of male to female of the 61 multidrug resistance strains was 1.54:1 and mainly distributed in the age group of under years(24.59%)and the age group of 21-30 years old(accounting for 27.87%).Conclusion It shows that the multidrug resistant patterns of Salmonella are diverse and the drug resistanct population are diverse and drug-resistant populations tend occurring to the young age group.Thus reasonable selection of antibiotics for clinical purpose is indicated.