Tatumella ptyseos causing severe human infection: report of the first two Brazilian cases.

Tatumella ptyseos is the type species of the Tatumella genus (Enterobacteriaceae). This fermentative Gram-negative rod has only rarely been reported as a cause of human infections; there is very little information about it in the medical literature. We report here the first two Brazilian cases of T. ptyseos infections, both evolving to severe sepsis.