Disappearance of some Brugia malayi foci from Madhya Pradesh, Orissa and Tamil Nadu and co-existence of Malayan and Bancroftian filariasis in some pockets
Russel, S.; Rao, A.R.; Khamre, J.M.; Praharaj, B.C.; Rao, C.K.
Journal of Communicable Diseases 12(4): 183-187
1980
ISSN/ISBN: 0019-5138 PMID: 7033355 Document Number: 159298
Surveys for filaria in 1979-80 in 5 villages of Madhya Pradesh, Orissa and Tamil Nadu in India, where Brugia malayi had been endemic 30-40 years previously, showed that the pathogen and its mosquito vectors (Mansonia spp. (Mansonioides spp.)) had completely disappeared from 4 of the villages and that B. malayi was coexisting with Wuchereria bancrofti in the fifth. W. bancrofti, together with its vector Culex quinquefasciatus Say (pipiens fatigans Wied.), was found to have invaded all the villages. The disappearance of B. malayi was attributed mainly to the removal of aquatic plants (such as Pistia and Eichhornia) favourable to the breeding of Mansonia spp. in preparation for fish and lotus culture, and to the filling in of some ponds for rice and coconut-palm culture. The invasion of the area by W. bancrofti was attributed partly to the migration of human carriers of microfilariae and partly to an increase in the density of C. quinquefasciatus as a result of the provision of a domestic water supply without adequate drainage.