Saikia Lahari, Medhi Devyashree, Bora Simi, Baishya Lakshyasri, Kataki Manjuri, Hazarika Suranjana Chaliha
Department of Microbiology, Gauhati Medical College and Hospital, Guwahati, Assam 781032 India.
Department of Microbiology, Kokrajhar Medical College and Hospital, Kokrajhar, Assam 783370 India.
Indian J Microbiol. 2024 Sep;64(3):957-962. doi: 10.1007/s12088-023-01167-5. Epub 2023 Dec 28.
is an emerging food-borne pathogen responsible for two types of food poisoning: emetic and diarrhoeal type. Here we report an emetic type of food-borne illness attributable to On 2nd February, 2021, 202 people suffered from pain in abdomen and vomiting after consuming the rice provided during a public gathering in Diphu, Assam. Culture of leftover fried rice showed growth of group of organisms. Molecular detection of enterotoxin and emetic toxin genes was done in the isolated strains by polymerase chain reaction. Multi locus sequence typing (MLST) and phylogenetic analysis was done to characterise the isolated strains. A total of five strains of were isolated. gene was found in isolates GMC22 & GMC24 and other enterotoxins producing genes were found in isolates GMC23 and GMC24. MLST identified four sequence types (STs) (ST1051, ST1616, ST998 and ST1000). Phylogenetic analysis clustered ST-1051 assigned to the GMC22 strain into the previously defined clade I and was in close relation with ST-144, representing a new cereulide-producing emetic cluster. As is a common contaminant of foods, it is essential to evaluate the pathogenic potential of the bacteria for a definite link between causative agents and the illness. MLST can be used to characterize the strains isolated from outbreak samples in order to link the probable pathogens with the illness. In this outbreak, we suggest that ST-1051 is the strain responsible for the food-borne illness, which was predominantly of emetic type.
是一种新兴的食源性病原体,可导致两种类型的食物中毒:呕吐型和腹泻型。在此,我们报告一起由呕吐型引起的食源性疾病。2021年2月2日,在阿萨姆邦迪普胡的一次公共集会中,202人在食用提供的米饭后出现腹痛和呕吐症状。剩余炒饭的培养显示出一组生物体的生长。通过聚合酶链反应对分离菌株进行了肠毒素和呕吐毒素基因的分子检测。进行了多位点序列分型(MLST)和系统发育分析以表征分离菌株。总共分离出五株 。在分离株GMC22和GMC24中发现了 基因,在分离株GMC23和GMC24中发现了其他产肠毒素基因。MLST鉴定出四种序列类型(STs)(ST1051、ST1616、ST998和ST1000)。系统发育分析将分配给GMC22菌株的ST-1051聚类到先前定义的进化枝I中,并与ST-144密切相关,代表一个新的产蜡样芽胞杆菌呕吐毒素簇。由于 是食品的常见污染物,因此评估该细菌的致病潜力对于确定病原体与疾病之间的明确联系至关重要。MLST可用于表征从爆发样本中分离的 菌株,以便将可能的病原体与疾病联系起来。在这次爆发中,我们认为ST-1051是导致食源性疾病的菌株,该疾病主要为呕吐型。