Safety of intramuscular injection of hepatitis B vaccine in haemophiliacs.

Infection with Yersinia enterocolitica usually results in a benign and self limiting enteric illness with or without mesenteric lymphadenopathy.'Diagnosis is made by direct culture of yersinia from stools, and in immunocompetent adults there is said to be a rapid and measurable serological response.'If necessary the illness can usually be cured by treatment with tetra- cyclines, co-trimoxazole, or trimethoprim.3The case that we report did not conform to this pattern.