Swift Journal of Medicine and Medical Sciences (SJMMS)
August 2015 Vol. 1(1), pp. 001-005

Copyright 2015 Swift Journals


Original Research Paper

ENTOMOLOGICAL SURVEY OF MOSQUITOES RESPONSIBLE FOR THE TRANSMISSION OF LYMPHATIC FILARIASIS IN Biase Cross River State, Nigeria

Mbah, M., Akpan, S.S., OtuBassey, I.B.& Daniel, H. B.

Department of Medical Laboratory Science, University of Calabar, Nigeria PMB 1115 Calabar Department of Microbiology, University of Calabar, Nigeria PMB 1115 Calabar

*Corresponding Author E-mail: mauricembah@yahoo.fr

Accepted 21 July, 2015


Abstract

This work was carried out in Biase, Cross River State, Nigeria from March to June, 2014. A total of 1296 mosquitoes made up of 795 (61.3%) Culex species, 342 (26.4%) Anopheles species, 102 (7.9%) Aedes species, and 57 (4.4%) of other Genera were caught using human bait and pyrethrum spray methods. Of the 1296 mosquitoes caught, 804 (62%) were caught in the rainy season while 492 (38%) were caught during dry season. The number of mosquitoes caught during dry and rainy seasons was statistically significant (X2 = 0.62, P < 0.05). The mosquitoes were segregated into different species and dissected to unveil any microfilaria in the thoracic, abdominal, and mouth part regions. Out of 1213 mosquitoes dissected, 24 (1.9%) had developed stages of L1, L2 and L3 of W. bancrofti, 8 (0.6%) had L3 larvae. Anopheles spp had the highest number of mosquitoes infected 11/329 (3.3%), Culex spp had a 13/743(1.7%) while out of the 98 Aedes species dissected none had any filarial worm seen. Ten (41.6%) larva was found in the head of both Anopheles and culex, while 8(33.3%) and 6 (25%) were found in the thorax and abdomen respectively. The two types of mosquitoes infected was statistically significant (X2=8.28, P>0.05). There was a positive correlation between the infection rate among mosquitoes in the dry and rainy season (r = 0.85, P<0.05).The distribution of filarial larva (L1, L2 and L3) in the body of mosquitoes showed that Out of the 11Anopheles infected, 4 (1.2%) filarial worms were found in the head, 5 (1.4%) in the thorax and 2(0.5%) in the abdomen while out of the 13 culex mosquitoes infected, 6 (0.7%) filarial worm were found in the head, 3(0.4%) in the thorax and 4 (0.5%) in the abdomen. The highest number of filarial worms seen was L3 with 17 (70.8%), followed by L1 with 5 (20.8%) and lastly by L2 with 2 (8.3%). This study has shown that Anopheles species and the Culex species are the vectors of lymphatic filariasis in the study area.

Keywords: Mosquitoes, Transmission, Lymphatic filariasis, Biase

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How To Cite This Article:

Mbah, M., Akpan, S.S., OtuBassey, I.B.& Daniel, H. B. Entomological Survey Of Mosquitoes Responsible For The Transmission Of Lymphatic Filariasis In Biase Cross River State, Nigeria. Swift Journal of Medicine and Medical Sciences 1(1), pp. 001-005.