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Background: Salmonella enterica subsp. enterica  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 nontyphoidal Salmonella serotype serotype isolated from human infections in Thailand and is also among the top 20 most frequently reported reported Salmonella serotypes serotypes 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: Multiple border rejections associated with serovar Rissen have been reported. Here we selected five as examples.  Pornsukarom 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. , while Half of Rissen isolates in the USA , about half of the S. Rissen isolates were pan-sensitive and some of US isolates were resistant to only tetracycline. 

Animal reservoir: Swine is the major animal reservoir of serovar Rissen, including pork production chain.

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