laribacter laribacter laribacter is a bacterial genus in the family of neisseriaceae. laribacter hongkongensis is the only species in the genus, and it has been isolated from human cases of diarrhea. however, its role in causing diarrhea is unproven, even though it has been hypothesized. laribacter scientific classification domain: bacteria phylum: pseudomonadota class: betaproteobacteria order: neisseriales family: neisseriaceae genus: laribacteryuen et al. 20024 type species laribacter hongkongensis species l. hongkongensis