Map: Peru, Locations/Dates of first clinical cholera cases
Caption: An El Nino event may well have triggered the resurgence of cholera in Peru. Warm water along the coast, coupled with plankton blooms nourished by El Nino rains, may have helped amplify the population of cholera bacteria already in the environment.
Source: C. Seas, J. Miranda, A. I. Gil, R. Leon-Barua, J. Patz, A. HuQ, R. Colwell and R.B. Sack
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