DcuB is a putative lipoprotein found only in enteric bacteria. In older males and males who have sex with males enteric bacteria are common. Yersinia bercovieri is a Gram-negative species of enteric bacteria. Blood meals drastically reduce the diversity of organisms and favor enteric bacteria. Enterococcus faecalis and/or other facultative enteric bacteria or Pseudomonas sp. About 50% of people with hyperinfection present with bacterial disease due to enteric bacteria. All enteric bacteria ferment glucose, which suggests they encounter it frequently. It is often used to differentiate enteric bacteria including "Salmonella" and "Shigella".