[Retroprospective clinical epidemiological research on leptospirosis cases hospitalised in the Infectious Diseases Clinic of Iasi]. / Cercetari clinico-epidemiologice, retroprospective, asupra cazurilor de leptospiroza, spitalizate in Clinica de Boli Infectioase Iasi, in perioada 1998-2004.

MATERIAL AND METHOD: Analytical assessment was performed for a sample of 499 patients admitted in the Infectious Diseases Clinic of Iasi, in order to highlight some clinical epidemiological and laboratory characteristics. RESULTS: During the third trimester, 45.3% of patients were hospitalized, comparatively with 7.8% during the first trimester, leading to a summer - autumn seasonality. Age groups of 31-60 years registered 57.3%; 90.2% were males, and only 13.2% agricultural workers. Clinical forms and evolution were assessed by testing a number of 10 biological and biochemical indicators. Leptospira icterohaemorrhagiae was the causal agent in 46.1% of cases, followed by L. wolffi (44.3%), L. pomona (4.2%), and l. grippotyphosa (3.4%). Average length of stay of 11-20 days (42.3%) and over 20 (21.4%) represented an indicator of unfavourable medical and socioeconomic involvements due to leptospirosis.