Survivorship Of Anopheles gambiae In Relation To Malaria Transmission In Ilorin, Nigeria

Olayemi, Israel Kayode and Ande, Adeolu Taiwo (2008) Survivorship Of Anopheles gambiae In Relation To Malaria Transmission In Ilorin, Nigeria. [Journal (On-line/Unpaginated)]

Full text available as:



For the first time in Africa, an entomological study went beyond the conventional practice of determining parity and survival rates of field-collected adult anopheline mosquitoes but also related these variables to duration of Plasmodium sporogony and estimated the expectation of infective life. Blood-seeking female mosquitoes were collected in Ilorin, Nigeria, from January 2005 to December 2006, and dissected for ovarian tracheations following WHO recommended techniques. The results indicated an annual mean parous rate of 70.92%, and significantly higher parous rates in the rainy than dry season, which also had very low densities. Mean probability of daily survival of the mosquitoes was 0.80, with annual mean life expectancy of 12.24 days. The probability of surviving the sporogonic cycle was low (< 0.4) but the expectation of infective life was long, especially in the rainy season (mean = 8.31 days). The epidemiological implications of these results were discussed. The An. gambiae population in Ilorin is dominated by older mosquitoes with high survival rates thus, suggesting a high vector potential for the species in the area. These information on the survival rates of An. gambiae in relation to malaria transmission would enhance the development of a more focused and informed vector control interventions.

Item Type:Journal (On-line/Unpaginated)
Keywords:Infection, Life expectancy, Mosquitoes, Parity, Plasmodium, Sporogonic cycle
Subjects:JOURNALS > Online Journal of Health and Allied Sciences
ID Code:6300
Deposited By:Kakkilaya Bevinje, Dr. Srinivas
Deposited On:17 Dec 2008 22:11
Last Modified:11 Mar 2011 08:57

References in Article

Select the SEEK icon to attempt to find the referenced article. If it does not appear to be in cogprints you will be forwarded to the paracite service. Poorly formated references will probably not work.

1. WHO. The Africa malaria report 2006. Available at

2. W. H. O. World malaria report. 2005. Available at

3. USAID. Health: USAID’s malaria programs. 2005. Available at

4. Odaibo FS. Malaria Scourge: The Facts, the Lies and the Politics. 2006. Available at

5. Coetzee M. Distribution of the African malaria vectors of the Anopheles gambiae complex. American Journal of Tropical Medicine and Hygiene. 2004;70(2):103-104.

6. Gillies MT, Coetzee A. A supplement to the anophelinae of Africa south of the Sahara, 1987;55. The South African Institute of Medical Research, Johannesburg, South Africa.

7. WHO/UNICEF. The Africa malaria report. 2003. WHO/CDS/MAL/2003.1093

8. Githeko AK. Service MW, Mbogo CM, Atieli FK, Juna FO. (). Origin of blood meals in indoor and outdoor resting malaria vectors in western Kenya. Acta Tropical 1994;58(3-4):307-316.

9. Costantini C, Li SG, della-Tore A. Density, survival and dispersal of Anopheles gambiae complex mosquitoes in a West African savanna village. Medical Veterinary Entomology, 1996;10:203-219.

10. Lemasson JJ, Fontenille D, Lochouarn L et al. Comparison of behaviour and vector efficiency of Anopheles gambiae and Anopheles arabiensis (Diptera: Culicidae)in Barkedji, a sahelian area of Senegal. Journal of Medical Entomology 1997;34(4):396-403.

11. Okogun GRA. Life-table analysis of Anopheles malaria vectors: generational mortality as tool in mosquito vector abundance and control studies. Journal of Vector-Borne Diseases, 2005;42:45-53.

12. Manyi MM, Imandeh NG. The infection rates of mosquitoes with Malaria and lymphatic filarial parasites in Makurdi, Benue state, Nigeria. Journal of Pest, Disease and Vector Management 2008;8:464-470.

13. The World Gazetteer Current population for cities and towns of Nigeria. 2007. Available at

14. Gillies MT, De Meillon B. The anophelinae of Africa south of the Sahara 54. 2nd ed. 1968. The South African Institute of Medical Research, Johannesburg, South Africa.

15. WHO. Malaria entomology and vector control: Learners guide, social mobilization and training. 2002. Available at

16. WHO. Manual on practical entomology in malaria. Part II. Methods and Techniques. World Health Organisation Offset Publication 1975. Geneva.13

17. Hannay PW. The mosquitoes of Zaria Province, northern Nigeria. Bull. Entomological Research, 1960;51:145–171.

18. Awolola TS, Okwa P, Hunt RH, Ogunrinade AF, Coetzee M. Dynamics of the malaria-vector populations in coastal Lagos, south-western Nigeria. Annals of Tropical Medicine and Parasitology 2002;96(1):75-82.

19. Minakaw, N, Sonye G, Mogi M, Githeko A, Yan G. The effects of climate factors on the distribution and abundance of malaria vectors in Kenya. Journal of Medical Entomology 2002;39:833-841.

20. Detinova TS. Age-grouping methods in Diptera of medical importance, with special reference to some vectors of malaria. World Health Organization Monographs Series 1962;47:216.

21. McMichael AJ, Martens P. The health impacts of global climate change: grasping with scenarios, predictive models, and multiple uncertainties. Ecosystem Health 1995;1:23-33.

22. Patz JA, Epstein PR, Burke TA, Balbus JM. Global climate change and emerging infectious diseases. JAMA 1996;275:217-223.

23. Martin PH, Lifebvre MG. Malaria and Climate: sensitivity of malaria potential transmission to climate. AMBIO 1995;25:200-207.


Repository Staff Only: item control page