[Familial leptospirosis caused by Leptospira grippotyphosa].

Leptospirosis is a zoonotic anthropurgic infection that occurs in the human population as sporadic cases or affects groups of individuals. Outbreaks are possible at any territory with a landscape harbouring natural reservoirs of Leptospyras and inhabited by small moitsaure-loving rodents. Leptospirosis peak season is summer. Specific diagnostic features and laboratory characteristics of 3 cases of leptospyrosis in a single household area are described.