An unusual increase in the incidence of viral fever was noticed in Androth and Kalpeni Island, U.T of Lakshadweep during November 2006. The Eco-epidemiology of the disease was studied in detail. The study indicated that Aedes albopictus is the predominant species (98.74%) and it exhibited a wide spectrum of breeding preferences with a clear-cut predilection for rat-damaged coconuts (RDCs). All the entomological indices were very high in both the Islands with a marked increase in Kalpeni Island. The clinical presentation of the cases was typical of chikungunya and the laboratory study confirmed this. Based on the investigation, control and preventive measures were planned, advised and implemented. The details regarding the bio-ecology of vectors, clinical presentation, laboratory investigations and effectiveness of control measures are discussed.
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