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Relation of rainfall pattern and epidemic leptospirosis in the Indian state of Kerala
  1. M J Pappachan,
  2. M Sheela,
  3. K P Aravindan
  1. Department of Pathology, Medical College, Calicut, India
  1. Correspondence to:
 Professor K P Aravindan
 Department of Pathology, Medical College, Calicut 673008, India;

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Leptospirosis epidemics in tropical countries are often related to heavy rainfall and flooding.1–4 The Indian state of Kerala has witnessed post-monsoon epidemics of leptospirosis in recent years. We investigated the relation between the pattern of daily rainfall and the incidence of disease in Calicut, North Kerala by plotting the number of confirmed cases having onset of illness on each day with the daily rainfall recorded for the district by the state meteorology department between July and October, 2002 (fig 1). The day of onset was …

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