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Gastrointestinal illnesses continue to be a global public health risk. Exposure to foodborne  Salmonella  directly or indirectly through consumption of ready-to-eat seafood can be an important route of infection to humans. This study was designed to estimate the population cell density, prevalence, virulence gene signatures, and antibiotic resistance of  Salmonella  serovars from ready-to-eat shrimps. Ready-to-eat (RTE) shrimp samples were obtained from different open markets in Delta and Edo States, Nigeria from November 2016 to October 2017. We employed classical and polymerase chain reaction (PCR) approaches. The mean  Salmonella  species enumerated from the RTE shrimps ranged from −0.301 to 5.434 log 10  cfu/g with 210/1440 (14.58%) of the RTE shrimp samples harbored  Salmonella  species. After biochemical and PCR approach, the identified isolates were  Salmonella  Enteritidis 11(24.4%),  Salmonella  Typhimurium 14 (31.1%) and other  Salmonella  spp. 20 (44.4%). All  Salmonella  species recovered were resistant to penicillin and erythromycin with 100% sensitivity to cefotaxime, cephalothin, colistin, and polymyxin B. Findings on the multidrug-resistant (MDR) profile showed that a total of 9/14 (64.3%) of  Salmonella  Enteritidis were resistant to 5 antibiotics which belongs to 3 different groups of antimicrobials with a multiple antibiotic-resistant (MAR) index of 0.21; while 3/11 (27.3%) of  Salmonella  Typhimurium were resistant to 11 antibiotics which belongs to 7 different groups of antimicrobials with a MAR index of 0.46. Virulence genes ( spi A,  sip B,  inv A,  sif  A,  flj B, and  sef A) and resistance genes (class 1 and II integrase,  sul 2,  catB 3,  flor, tmp, bla  TEM ,  str B,  dfr 1, and  tet C) were also detected in some of the  Salmonella  species with variable percentage. This study indicates that ready-to-eat shrimps are probable reservoirs harboring  Salmonella  strains. The identified  Salmonella  isolates which exhibited virulence determinants and antibiotic-resistant coupled with high MAR index constitute a consumer health risk to the communities.

Prevalence of Antimicrobial Resistance and Virulence Gene Elements of Salmonella Serovars From Ready-to-Eat (RTE) Shrimps