[Leptospirosis after a staff outing]

Three male colleagues aged between 34 and 38 years were admitted at the same time to three different Rhein-Main area Hospitals. They presented with a variety of symptoms, including high fever (39.0 to 40.0 degrees C), chills, headache with meningismus or facial paralysis, mild hepatitis and renal involvement. About 18 days before they had been together on a boat rafting tour when the boat capsized when they had fallen into a river in high flood.

Laboratory tests showed elevated inflammatory parameters, signs of a mild hepatitis and renal involvement. All patients had leptospirosis antibodies, detected by immunofluorescence test. In two cases there was evidence of antibodies against Leptospira interrogans serovar bataviae in the microscopic agglutination test (MAT).

The history and clinical presentation indicated leptospirosis in all patients, in two cases confirmed by laboratory findings. Following therapy with doxycycline or ceftriaxone, symptoms resolved quickly and permanently.

Leptospires of serogroup Bataviae is a known pathogen of anicteric non-Weil leptospirosis. The symptoms are non-specific and, moreover, in some cases the laboratory tests are negative, so that clinical diagnosis remains crucial. Typically there is a history of contact with contaminated water or urine. In our cases striking neurotropism was observed, which may be characteristic for this serovar.