Analysis of distribution of serotype and drug resistance of Shigella in Shenzhen.

Objective To understand the distribution and drug resistance of Shigella in food service workers in Shenzhen. Methods Based on the procedure identification of enterobacteria WS/T 125-1999 and disk diffusion method,the bacteria were isolated,identified and susceptibility test were carried out. Results 33 strains of Shigella were isolated and serotyped including 32 strains of Shigella B,occupied 96.97% and 1 strain of Shigella C,occupied 3.03%.Serotype A and D were not isolated.Among Shigella B,12 were Shigella flexneri 2(accounted for 36.36%),10 were Shigella flexneri 4(30.30%),4 were Shigella flexneri 1(12.12%).5 were Shigella flexneri X(15.15%),1 was Shigella flexneri Y(3.03%).Drug susceptibility test revealed that Shigella was all sensitive to gentamycin,levofloxacin,ofloxacin,norfloxacin,ciprofloxacin,cefamezin cefmetazole,furazolidone and resistant to midecamycin. Conclusion Shigella isolated from food service workers has changed a little.Forazolidone,ciprofloxacin and ofloxacin are the drug of choice in clinical treatment of dysentery.