[Chronic recurrent fever as the sole symptom of Yersinia enterocolitica infection].

Recurrent fever lasting for nine months up to ten years occurred in seven women and three men, with fever of up to 39 degrees C lasting from two to seven days. All patients had travelled outside of Germany at least one year previously. Micro-Widal reaction revealed antibodies against Yersinia enterocolitica (serotype 0:3 or 0:9), with a titre of between 1:80 and 1:1280. Antibiotic treatment (doxycycline or cotrimoxazole) brought cure in all ten. The antibody titres fell in seven of nine patients; titres could not be followed in one.