<i>Anopheles</i> species composition and some climatic factors that influence their survival and population abundance in Anambra East LGA, Anambra State, Nigeria.
https://doi.org/10.4314/njpar.v41i2.17
Keywords:
relative humidity, rainfall, temperature, abundance, Anopheles mosquitoesAbstract
Malaria parasites are transmitted in nature through the bites of female Anopheles mosquitoes. However, the vector distribution varies in time and space. This study aimed to determine the species composition, abundance and climatic factors influencing Anopheles mosquitoes in Anambra East Local Government Area of Anambra State, Nigeria from October 2016 to September 2017. Adult Anopheles mosquitoes were collected from indoor and outdoor locations using Pyrethrum Knockdown Collection (PKC) and Human Landing Catch (HLC) Methods respectively. Anopheles mosquito larvae were collected using dipping method. Morphological identification of Anopheles species was carried out using standard identification keys. Climatic data was obtained from Nigerian Meteorological Agency Office in Anambra State. A total of 8181 female Anopheles mosquitoes which comprised 4127 (50.4%) larvae and 4054 (49.6%) adults were collected (P> 0.05) in the study. Four Anopheles species: An. gambiae s. l (70.1%), An. funestus group (18.2%), An. moucheti (6.3%) and An. nili (5.4%) were identified (P < 0.05). In the study area, 2608 (31.9%), 3025 (37.0%) and 2548 (31.1%) Anopheles mosquitoes were collected from Aguleri, Igbariam and Nsugbe respectively; with 100% species overlap. In each selected selected town, the Simpson’s index of diversity was ~2 and Shannon-wiener diversity was ~1. Only An. gambiae s. l showed varied seasonal abundance with wet season contributing 67.9% and dry season 32.1% of the overall An. gambiae s. l collection (P< 0.05). The correlation between rainfall and An. gambiae s. l. abundance was significantly strong (r = 0.66; P < 0.05). No significant
correlation was found between Anopheles species abundance and temperature as well as relative humidity. The study revealed the preponderance of four Anopheles species: An. gambiae s. l., An. funestus, An. moucheti and An. nili; and rainfall is the only climatic factor that causes temporal change in the abundance of one of the species, An. gambiae s. l. in the study area.
References
Service, M. W. and Townson, H. (2002). The Anopheles vector. In: Gilles H. M. and Warrell, D. A., (editors). Essential Malariology. Fourth
edition ed. London:Arnold. pp. 59–84.
Sinka, M. E., Bangs, M. J., Manguin, S., RubioPalis, Y., Chareonviriyaphap, T., Coetzee M., Mbogo, C.M., Hemingway, J., Patil, A.P., Temperley, W. H., Gething, P. W., Kabaria, C. W., Burkot, T.R., Harbach, R.E. and Hay, S.I. (2012). A global map of dominant malaria vectors. Parasites and Vectors; 5: 69.
Coetzee, M., Hunt, R. H., Wilkerson, R., Della Torre, A., Coulibaly, M. B. and Besansky, N. J. (2013). Anopheles coluzzii and Anopheles
amharicus, new members of the Anopheles gambiae complex. Zoo Taxa; 3619: 246–274.
Kipyab, P. C., Khaemba, B. M., Mwangangi, J. M. and Mbogo C. M. (2013). The bionomics of Anopheles merus (Diptera: Culicidae) along the
Kenyan coast. Parasites and Vectors; 6 :37.
Oyewole, I. O., Ibidapo, C. A., Okwa, O. O., Oduola, A. O., Adeoye, G. O., Okoh, H. I. and Awolola, T. S. (2010). Species Composition and
Role of Anopheles Mosquitoes in Malaria Transmission along Badagry Axis of Lagos Lagoon, Lagos, Nigeria. International Journal of
Insect Science; 2: 51 – 57.
Okorie, P. N., McKenzie, F. E., Ademowo, O. G., Bockarie, M. and Kelly-Hope, L (2011) Nigeria Anopheles Vector Database: An Overview of 100 Years' Research. PLoS ONE 6(12): e28347
Irikannu, K. C., Onyido, A. E., Umeanaeto, P. U., Onwube, O., Ogaraku, J.C., Egbuche, C.M., Oyeniyi, A. T., Adesalu, O. O. and Jimoh, T. R.
(2019). Molecular characterization and malaria transmission potential of Anopheles gambiae complex in Awka, Anambra state, Nigeria.
International Journal of Mosquito Research, 6(6): 96 – 101.
Autino, B., Noris, A., Russo, R. and Castelli, F. (2012). Epidemiology of Malaria in Endemic Areas. Mediterranean Journal of Haematology
and Infectious Diseases; 4(1): e2012060.
Onyido, A.E., Obi, N.C., Umeanaeto, P.U., Obiukwu, M.O. and Egbuche, M.C. (2011). Malaria prevalence and indoor biting mosquito
vector abundance in Ogbunike, Oyi LGA, Anambra State Nigeria. African Research Review; 5(3): 1-12.
Ndenga, B., Githeko, A. Omukunda, E., Munyekenye, G., Atieli, H., Wamai, P. Mbogo, C., Minakawa, N., Zhou, G., and Yan, G. (2006).
“Population dynamics of malaria vectors in Western Kenya highlands,” Journal of Medical Entomology; 43 (2): 200–206.
Mboera, L. E. G., Rwegoshora, R. T., Senkoro, K. P., Rumisha, S. F., Mayala, B. K., Mlozi, M. R. S., Shayo, E.H. Senkondo, E. and Maerere,
A.(2010). Spatio-temporal variation in malaria transmission intensity in five agro-ecosystems in Mvomero District, Tanzania. Geospacial Health; 4:167-78.
Ernst, K., Adoka, S., Kowuor, D., Wilson, M and John, C. (2006). Malaria hotspot areas in a highland Kenya site are consistent in epidemic
and non-epidemic years and are associated with ecological factors. Malaria Journal; 5:78.
Simon-Oke, I. A. and Olofintoye, L. K. (2015). The Effect of Climatic Factors on the Distribution andAbundance of Mosquito Vectors
in Ekiti State. Journal of Biology, Agriculture and Health Care; 5(9): 142 – 146.
Ezihe, E.K., Chikezie, F.M., Egbuche, C. M., Nwankwo, E. N., Onyido, A. E., Aribodor, D. N. and Lazarus, S. M. (2017). Seasonal Distribution
and Micro-climatic factors influencing the Abundance of the Malaria Vectors in South-East Nigeria. Journal of Mosquito Research, 7(3): 15-
Rogers, D. and Randolph, S. (2006). Climate Change and Vector- borne diseases. Advances in Parasitology; 62: 345-381
Bayoh, N. and Lindsay, S. (2003). Effect of temperature on the development of the aquatic stages of Anopheles gambiae sensu stricto
(Diptera: Culicidae). Bulletin of Entomological Research; 93(5): 375 - 381
Haque, U., Hashizume, M., Glass, G.,Ashraf, M., Dewan, A. and Overjaard H (2010). The role of climate variability in the spread of malaria in
Bangladesh highlands. PloS ONE; 5 (12): e14341.
Thu, H.M., Aye, K.M., Thein S., (1998). The effect of temperature and humidity on dengue virus propagation in Aedes aegypti mosquitos,
Southeast Asian. Journal of Tropical Medicine and Public Health; 29: 280–284.
Ukpong, I. G., Etim, S. E., Ogban, E. I., andAbua L. L. (2015). Prevalence of Malaria in the Highlands of Obudu Cattle Ranch, Nigeria.
International Journal of Tropical Disease and Health; 7(3): 87-93
Umaru, M. L. and Uyaiabasi, G. N. (2015). Prevalence of Malaria in Patients Attending the General Hospital Makarfi, Makarfi KadunaState, North-Western Nigeria. American Journal of Infectious Diseases and Microbiology; 3(1): 1- 5
Imbahale, S. S., Paaijmans, K. P., Mukabana, W. R., Van Lammeren, R., Githeko, A.K. and Takken, W. (2011). A longitudinal study on
Anopheles mosquito larval abundance in distinct geographical and environmental settings in western Kenya. Malaria Journal; 10: 81.
Atieli, H. E., Zhou, G., Lee, M.- C., Kweka, E., Afrane,Y.A., Mwanzo, I., Githeko,A. K andYan, G. (2011). Topography as a modifier of breeding
habitats and concurrent vulnerability to malaria risk in the western Kenya highlands. Parasites and Vectors; 4(1):Article ID 241
Alaba, O. A. and Alaba, O. B. (2009). Malaria in Rural Nigeria: Implications for the Millennium Development Goals. African Development
Review; 21(1): 73 – 85.
Onyido,A., Deezia, N., Obiukwu, M. andAmadi.E. (2008). Ecology Of Man-Biting Mosquitoes inthe Development Site of Nnamdi Azikiwe
University Awka, Anambra State Southeastern Nigeria. The Internet Journal of Health. Volume 9 Number 2.
Onyido, A.E., Obinatu, S. C., Umeanaeto, P. U., Obiukwu, M. O. and Egbuche, C. M. (2011). Malaria Prevalence and Mosquito vector
Abundance in Uli Town, Ihiala Local Government Area, Anambra State, Nigeria. African Journal of Biomedical Research; 14: 175-182.
Onyido, A. E., Ugha, C. N., Eneanya, O. A., Umeanaeto, P. U., Egbuche, C. M., Obiechina, I. O., Ezugbo-Nwobi, I. K. and Nwangwu, U. C.
(2014). Malaria vector bionomics in Abagana community of Anambra State, Southeastern Nigeria. Journal of American Science;10(2): 157-161.
Okonkwo, N.J., Obiechina, I.O., Ugha, C.N., Irikannu, K.C., Obianumba, S.N., OkoyeUzochukwu, C.I., Iwuora, O.I., Chinweoke, J.O. (2014). Mosquito species compositions in Oba, Idemili South Local Government Area of Anambra state. Researcher, 6(8): 51-56
Onyido, A. E., Ezeani, A. C., Irikannu, K. C., Umeanaeto, P. U., Egbuche, C. M., Chikezie, F. M. and Ugha, C.N. (2016). Anthropophilic
mosquito species prevalence in Nibo community, Awka South Local Government Area, Anambra State, South Eastern Nigeria. Ewemen Journal of Epidemiology and Clinical medicine; 2(1): 14 - 20
Ezihe, E. K., Egbuche, C. M., Nwankwo, E. N., Ukonze, C., Anumba, J. U., Umenzekwe, C. C. and Ogudu, O. E. (2019). Malaria Vector
Abundance and the Incidence of Malaria Parasite amongst Students Living in Nnamdi Azikiwe University Hostels. International Journal of Tropical Disease & Health; 37(4): 1-10.
Egbuche, C. M., Ezihe, C. K.,Aribodor, D. N. and Ukonze, C. B. (2016). Survey of mosquitoes in open and closed larval habitats in Aguleri,
Anambra East Local Government Area of Anambra State, South Eastern Nigeria. Journal Mosquito Research; 6(17): 1-5.
WHO (2003). Malaria entomology and vector control: Learners guide, social mobilization and training. Available at www.malaria.org.zw/vector/vc24.pdf. pp 109.
WHO (2012). Malaria Transmission Indices and Factors Affecting Transmissions. Training Manual on Entomology for Entomology and
Vector Control Technicians; 8: 48 – 54.
Gillies, M. T. and Coetzee, M. (1987). A supplement to theAnophelinae ofAfrica South of the Sahara (Afrotropical Region). Publication of
South African Institute for Medical Research; 55: 143.
Gillet, J. D. (1972). Common African Mosquitoes and their Medical Importance. William Heinemann Medical Books Ltd., London, UK.
pp106.
Abdullahi, K., Abubakar, U., Daneji, A. I., Adamu, T.,Abdullahi,Y. M., Bandiya, H. M., and Hassan, S. W. (2010). Anopheles gambiae in
Sokoto, North Western Nigeria. Nigerian Journal of Parasitology, 31(2): 118 – 122
Lamidi, B. T., Naphtali, R. S., Alo, E. B. and Oyeniyi, A.T. (2018). Malaria vector population density and man – biting rate in three selected
areas of Taraba State, North – East Nigeria. Nigerian Journal of Parasitology, 39(2): 141 – 147.
Omalu, I. C. J., Eke, S. S., Olayemi, I. K., Egwim, E. C., Yamman, H. U., Ocha, I. M., Ogunniyi, M. T., Ajibaye, O. S., Otuu, C. A., Nnaji, C.I. and
Inyama, P.U. (2019). Diversity of Anopheles gambiae s. s. and Plasmodium falciparum in Minna Nigeria. Nigerian Journal of Parasitology, 40(2): 135 – 140.
Okullo, A. E., Matovu, J. K. B., Ario, A. R., Opigo, J., Wanzira, H., Oguttu, D. W. and Kalyango, J. N. (2017) Malaria incidence among
children less than 5 years during and after cessation of indoor residual spraying in Northern Uganda. Malaria Journal; 16: 319.
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