Shigella flexneri

Shigella flexneri can cause diarrhea in humans. There are several different serogroups of Shigella

Shigella

Shigella is a genus of Gram-negative, non-spore forming rod-shaped bacteria closely related to Escherichia coli and Salmonella. The causative agent of human shigellosis, Shigella cause disease in primates, but not in other mammals. It is only naturally found in humans and apes. During infection,...

; S. flexneri belongs to group B. S. flexneri infections can usually be treated with antibiotics although some strains have become resistant

Antibiotic resistance

Antibiotic resistance is the ability of a microorganism to withstand the effects of antibiotics. It is a specific type of drug resistance. Antibiotic resistance evolves via natural selection acting upon random mutation, but it can also be engineered by applying an evolutionary stress on a population...

. Less severe cases are not usually treated because they become more resistant in the future.