Malaria survey in Tarajulie tea estate and adjoining hamlets in Sonitpur District, Assam

Malaria survey in Tarajulie tea estate (TE) and its adjoining hamlets revealed that Pf was the predominant parasite species (79%) and morbidity was alarming. Malaria positive cases were recorded in all age groups including infants. However, morbidity was much pronounced in the hamlets than among garden dwellers. Mostly Anopheles minimus were recorded in the day resting collections from human dwellings (indoor) and in overnight man biting catches in the hamlets. From these collections. An. minimus was incriminated and the sporozoite infection rate was found to be 4.23 per cent. An. minimus were not recorded in the garden premises. Thus morbidity in the garden population was attributed to the movement of labourers to and fro between hamlets and the garden premises. The hamlets served as reservoirs for malaria infection.