Outbreak of Salmonella Serotype Typhimurium Isolated from Patients in Na Yong Hospital, Trang Province-การระบาดของเชื้อซัลโมเนลล่าซีโรทัยป์ Typhimurium จากผู้ป่วยโรงพยาบาลนาโยง จังหวัดตรัง

Abstract

            Sixty-nine rectal swabs of food poisoning patients admitted at Na Yong hospital, Trang Province during April 4 - 8, 2008 were cultured at Regional Medical Sciences Center Trang to identify cause of outbreak.  Salmonella spp. was isolated in 36 samples (52.2%), Aeromonas spp. in two sample (2.9%) and Vibrio parahaemolyticus in one sample (1.4%).

             All Salmonella spp. isolated were distinguished into 2 serogroups, 35 samples (97.3%) were serogroup B and one sample (2.7%) was serogroup C. Serotyping were identified by Kauffmann-White scheme and Sven Guard method.   All of Salmonella serogroup B were serotype Typhimurium. Salmonella serogroup C was serotype Singapore.  Salmonella spp. Serogroup B serotype Typhimurium was isolated from two cooks (100%). Drug susceptibility of Salmonella spp. serotypes Typhimurium and Singapore by the disk diffusion method with 9 antimicrobial agents such as ampicillin, tetracycline, co-trimoxazole, chloramphenical, streptomycin, norfloxacin, cefotaxime, ceftriaxone and gentamicin were 100 percent.

              This result indicates that Salmonella spp. serotype Typhimurium were the causative agent of the outbreak among patients consuming pork and chicken products and, therefore provide a basis for preventative interventions.

Key words:      salmonella, serotype, recta swab