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Background: Salmonella enterica subsp. enterica serovar Rissen (antigenic formula 6,7,14:f,g:-) is a serovar of the O:7 (C1) serogroup. This serovar was first isolated from HOST in LOCATION in YEAR. Serovar Rissen is the 4th most common nontyphoidal Salmonella serotype serovar isolated from human infections in Thailand and is also among the top 20 most frequently reported Salmonella serotypes serovars in the United States. 

NCBI PD link for serovar Rissen: https://www.ncbi.nlm.nih.gov/pathogens/isolates/#taxgroup_name:(%22Salmonella%20enterica%22)%20AND%20computed_types:(%22serotype=Rissen%22)

Genetic characteristics: Serovar Rissen ST469 was found in Thailand, China, Italy. 

Pornsukarom et al. reported that all Thai Rissen isolates in this study were multidrug-resistant and more than 90% were resistant to ampicillin, sulfisoxazole, tetracycline and streptomycin. Half of Rissen isolates in the USA were pan-sensitive and some of US isolates were resistant to only tetracycline. Wang et al. identified Rissen human isolates (anal swabs or feces) had the common resistance profile as ampicillin, trimethoprim-sulfamethoxazole, and tetracycline; respectively conferring to resistance genes bla_TEM, tetA, and sul3.

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