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Indian J Microbiol

Department of Microbiology, Gauhati Medical College and Hospital, Guwahati, Assam 781032 India.

Published: September 2024

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.

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11399483PMC
http://dx.doi.org/10.1007/s12088-023-01167-5DOI Listing

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