[A case of Leptospira hebdomadis infection treated with piperacillin (author's transl)].

A 35-year-old male went fishing at the Agano River side in the suburbs of Toyosaka City, in August 1977. He was admitted to the hospital then with the chief complaints of high fever and severe headache on the 5th day of illness. Following the intravenous drip infusion of 12 g piperacillin for 6 1/2 days, he became afebrile within 2 days and recovered rapidly. Bacteriological examination disclosed none of significant data. Serum agglutinin reaction for leptospirosis, however, was positive in a titer up to 1:2,560 to L. hebdomadis, except for L. icterohemorrhagiae, L. autumnalis, L. australis and L. canicola.