Insecticide-treated durable wall lining (DL) was designed for user-independent and longer-lasting malaria vector control lacking in insecticide-treated bed nets and indoor residual spraying, respectively. Field efficacy studies involving pyrethroid-treated DL in Africa have been limited to experimental huts and mobile population settings. This study reports a preliminary assessment of village-scale DL installation against An. gambiae s.l in Akorede, Kwara State, Nigeria. Two similar villages were selected as DL intervention and control sites. Subsamples of installed DL were assessed for bio-efficacy every six months while window exit trap and monthly pyrethrum spray mosquito collections were conducted in both sites. Anopheles gambiae s.l collected were identified with PCR and tested for human blood and Plasmodium falciparum sporozoite using ELISA. Compared to baseline, the number of mosquitoes reduced significantly (p = 0.008) with 0% sporozoite rate in the intervention village but remained the same or increased significantly (p = 0.003) with 2.59% post-baseline sporozoite rate in the control. Bio-efficacy of DL remained 100% (mortality) with significantly (p = 0.04) increased mortality (53%) of free-flying indoor and exiting mosquitoes in the intervention village compared to control (1.8%). The results provide preliminary evidence to justify the need for randomized controlled trials in rural communities with pyrethroid-susceptible mosquitoes. Recent reports of widespread pyrethroid resistance in the Anopheles gambiae s.l also call for development and assessments of non-pyrethroid insecticide incorporated control tools.
Keywords: An. gambiae s.l, insecticide-treated durable wall lining, malariaAsidi A., N’Guessan, R., Akogbeto, M., Curtis, C., & Rowland, M. (2012). Loss of household protection from use of insecticide-treated nets against pyrethroid-resistant mosquitoes, Benin. Emerging Infectious Diseases, 18, 1101–1106.
Beier, J.C., Perkins, P.V., Wirtz, R.A., Oros, J., Diggs, D., Gargan, T.P. 2nd., & Koech, D.K. (1988). Blood meal identification by direct enzyme-linked Immunosorbent assay (ELISA), tested on Anopheles (Diptera: Culicidae) in Kenya. Journal of Medical Entomology, 25, 9-–16.
Burns, M., Rowland, M., N’Guessan, R., Carneiro, I., Beeche, A., Ruiz, S.S., Kamara, S., Takken, W., Carnevale, P., & Allan, R. (2012). Insecticide-treated plastic sheeting for emergency malaria prevention and shelter amongst displaced population: aAn observational cohort study in a refugee setting in Sierra Leone. American Journal of Tropical Medicine and Hygiene, 87, 242–250.
Chandre, F., Dabire, R.K., Hougard, J., Djogbenou, L.S., Irish, S.R., Rowland, M., & N`Guessan, R. (2010). Field efficacy of pyrethroid treated plastic sheeting (durable lining) in combination with long lasting insecticidal nets against malaria vectors. Parasite and Vectors, 3, 65.
Diabate, A., Chandre, F., Rowland, M., N’Guessan, R., Duchon, S., Dabire, K.R., & Hougard, J.M. (2006). The indoor use of plastic sheeting pre-impregnated with insecticide for control of malaria vectors. Tropical Medicine and International Health, 11, 597-–603.
Favia, G., della Torre, A., Bagayoko, M., Lanfrancotti, A., Sagnon, N., Toure, Y.T., & Coluzzi, M. (1997). Molecular identification of sympatric chromosomal forms of Anopheles gambiae and further evidence of their reproductive isolation. Insect Molecular Biology, 6, 377-–383.
Gillies, M.T., & Coetzee, M.A. (1987). Supplement to the Anophelinae of Africa South of the Sahara (Afrotropical region). Publication of South African Institute of Medical Research, 55, 141 – 143.
Githeko, A.K., Service, M.W., Mbogo, C.M., Atieli, F.K., & Juma, F.O. (1993). Plasmodium falciparum sporozoite and entomological inoculation rates at Ahero rice irrigation scheme and the Miwani sugar-belt in Western Kenya. Annals of Tropical Medicine and Parasitology, 87, 379-–391.
Koenker, H.M., Loll, D., Rweyemamu, D., & Ali, A.S. (2013). A good night’s sleep and the habit of net use: Perceptions of risk and reasons for bed net use in Bukoba and Zanzibar. Malaria Journal, 12, 203.
Kolaczinski, K., Kolaczinski, J., Kilian, A., & Meek, S. (2007). Extension of indoor residual spraying for malaria control into high transmission settings in Africa. Transactions of the Royal Society of Tropical Medicine and Hygiene, 101, 852–853.
Messenger, L.A., Miller, N.P., Adeogun, A.O., Awolola, T.S., & Rowland, M. (2012). The development of insecticide-treated durable wall lining for malaria control: iInsights from rural and urban populations in Angola and Nigeria. Malaria Journal, 11, 332.
Ngufor, C., Tchicaya, E., Koudou, B., N’Fale, S., Dabire, R., Johnson, P., Ranson, H., & Rowland, M. (2014). Combining organophosphate treated wall linings and long-lasting insecticidal nets for improved control of pyrethroids resistant Anopheles gambiae. PLoS ONE, 9(1), e83897. doi:10.1371/journal.pone.0083897.
Nkamedjie, P.P., Dongho, G.B., Mabvouna, R.B., Russo, G., & Sobze, M.S. (2017). Long lasting impregnated mosquito net (LLIN) utilization, incidence of fever and therapeutic itineraries: tThe case of Mifi health district in western Cameroon. Malaria World Journal, 8, 19.
Obembe, A., Anyaele, O.O., & Oduola, A.O. (2014). Lessons from the implementation of LLIN distribution campaign in Ilorin Kwara State, Nigeria. BMC Public Health, 14, 514.
Ogbeibu, A.E. (2005). Biostatistics: A practical approach to research and data handling. Benin City: Mindex Publishing Company Limited, Benin City. Pp. 131.
Rowland, M. (1999). Malaria control: bBednets or spraying? Malaria control in the Afghan refugee camps of western Pakistan. Transactions of the Royal Society of Tropical Medicine and Hygiene, 93, 458–459.
Scott, J.A., Brogdon, W.G., & Collins, F.H. (1993). Identification of single specimens of the Anopheles gambiae complex by the polymerase chain reaction. American Journal of Tropical Medicine and Hygiene, 49, 520 – 529.
Service, M.W. (1977). A critical review of procedures for sampling populations of adult mosquitoes. Bulletin of Entomological Research, 67, 343-–382.
Strode, C., Donegan, S., Garner, P., Enayati, A.A., & Hemingway, J. (2014). The impact of pyrethroid resistance on the efficacy of insecticide-treated bed nets against African anopheline mosquitoes: sSystematic review and meta-analysis. PLoS Medicine, 11(3), e1001619. doi.org/10.1371/journal.pmed.1001619.
Von Seidlein, L., Konstantin, I., Bruun, R., Jawara, M., Pinder, M., Knols, B.G.J., & Knudsen, J.B. (2012). Airflow attenuation and bed net utilization: oObservations from Africa and Asia. Malaria Journal, 11, 200.
Watiro, A.H., & Awoke, W. (2016). Insecticide-treated net ownership and utilization and factors that influence their use in Itang, Gambella rRegion, Ethiopia: cCross-sectional study. Risk Management and Healthcare Policy, 9, 101–112.
WHO. (1998). Test procedures for insecticide resistance in malaria vectors, bio-efficacy and persistence of insecticides on treated surfaces. Retrieved from www.who.int/malaria/publications/atoz/who_cds_cpc_mal_98_12/en.
WHO. (2003). Malaria entomology and vector control: Learner’s guide. Retrieved from http://whqlibdoc.who.int/hq/2003/WHO_CDS_CPE_SMT_2002.18_Rev.1_PartI.pdfhttp://whqlibdoc.who.int/hq/2003/WHO_CDS_CPE_SMT_2002.18_Rev.1_PartI.pdf.
WHO. (2006a). Indoor Residual Spraying. Use of indoor residual spraying for scaling up global malaria control and elimination. Retrieved from whqlibdoc.who.int/hq/2006/WHO_HTM_MAL_2006.1112_eng.pdf.
WHO. (2006b). Guidelines for testing mosquito adulticides for indoor residual spraying and mosquito net treatment. Retrieved from whqlibdoc.who.int/.../2006/WHO_CDS_NTD_WHOPES_GCDPP_2006.
WHO. (2014). World malaria report. Geneva, : World Health Organization. Retrieved from (www.who.int/malaria/publications/world_malaria_report.../wmr-2014-no-profiles.pdf accessed 26 December 2016www.who.int/malaria/publications/world_malaria_report.../wmr-2014-no-profiles.pdf on 26 December 2016).
Wirtz, R.A., Zavala, F., Charoenvit, Y., Cambell, G.H., Burkot, T.R., Schneider, I., Esser, K.M., Beaudoin, R.L., & Andre, R.G. (1987). Comparative testing of Plasmodium falciparum sporozoite monoclonal antibodies for ELISA development. Bulletin of the World Health Organization, 65, 39 – 45.