First report of a multidrug-resistant Salmonella enterica Serovar Infantis carrying pESI megaplasmid isolated from marine shrimp in India. 2022

Jerusha Stephen, and Manjusha Lekshmi, and Binaya Bhusan Nayak, and Sanath H Kumar
Quality Control Laboratory, Post-Harvest Technology Department, ICAR-Central Institute of Fisheries Education, Versova, Mumbai, 400061, India.

Non-typhoidal Salmonella enterica (NTS) in seafood is an important human health concern. An emerging strain of NTS serovar Infantis carrying a megaplasmid pESI and resistant to multipe drugs has been responsible for frequent food-borne human infections worldwide. S. enterica strain JS5 was isolated from a sample of shrimp from the retail market on XLD agar after enrichment in the RV medium. The genomic DNA was isolated and sequenced using the Illumina platform. The draft whole genome sequence of Salmonella Infantis JS5 revealed the presence of a plasmid. The genome size was 4,977,731 bp with 4663 open reading frames. The bacterium harboured a megaplasmid similar to the pESI plasmid reported in the emerging S. Infantis. The 285 kb plasmid contained the characteristic genes of the pESI plasmids, such as the mercury operon, yersiniabactin siderophore operon, fimbriae, toxin-antitoxin systems and the hypothetical protein backbone. The antibiotic resistance genes tet(A), dfrA14, aadA, qacEdelta1, and sul1 were detected. To the best of our knowledge, this is the first report on pESI plasmid carrying S. Infantis from India.

UI MeSH Term Description Entries
D002645 Chickens Common name for the species Gallus gallus, the domestic fowl, in the family Phasianidae, order GALLIFORMES. It is descended from the red jungle fowl of SOUTHEAST ASIA. Gallus gallus,Gallus domesticus,Gallus gallus domesticus,Chicken
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D012475 Salmonella A genus of gram-negative, facultatively anaerobic, rod-shaped bacteria that utilizes citrate as a sole carbon source. It is pathogenic for humans, causing enteric fevers, gastroenteritis, and bacteremia. Food poisoning is the most common clinical manifestation. Organisms within this genus are separated on the basis of antigenic characteristics, sugar fermentation patterns, and bacteriophage susceptibility.
D014774 Virulence The degree of pathogenicity within a group or species of microorganisms or viruses as indicated by case fatality rates and/or the ability of the organism to invade the tissues of the host. The pathogenic capacity of an organism is determined by its VIRULENCE FACTORS. Pathogenicity
D017747 Seafood Marine fish and shellfish used as food or suitable for food. (Webster, 3d ed) SHELLFISH and FISH PRODUCTS are more specific types of SEAFOOD. Sea-Food,Sea Food,Sea-Foods,Seafoods
D019779 Salmonella enterica A subgenus of Salmonella containing several medically important serotypes. The habitat for the majority of strains is warm-blooded animals.
D065288 Serogroup A set of variants within a species of microorganisms that are antigenically, closely related. With bacteria, a serogroup refers to a group that shares a common antigen. Serotype,Serovar,Serogroups,Serotypes,Serovars

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