2024, Vol. 5, Issue 2, Part A
Contribution of different Anopheles vector complexes and groups to malaria transmission in the Covè, Zagnanado and Ouinhi districts, southern Benin
Author(s): Boulais Yovogan, Clément Agbangla, Armel Djènontin, Constantin J Adoha, Esdras M Odjo, Roseric Azondekon, Landry Assongba, Juniace Ahoga, Juvénal M Ahouandjinou, Linda Towakinou, Eloi M Honvoh, Olivier Oussou, André Sominahouin, Ramziyath Agbanrin Youssouf, Kèfilath Badirou, Virgile Gnanguenon, Razaki Ossè, Gil G Padonou and Martin C Akogbéto
Abstract: Background: Malaria remains a major public health issue in Benin. The present study investigated the contribution of different malaria vector complexes and groups to the disease transmission in the Cove, Zagnanado and Ouinhi health area. Methods: Between september 2019 and april 2022, mosquito collections through Human Landing Catches were carried out over 9 rounds of collection, in 60 clusters/villages. Morphological identification of the mosquito specimens collected was carried out. A randomly selected subsample of An. gambiae complex and An. funestus and An. nili groups collected indoors and outdoors was screened for Plasmodium falciparum sporozoite infection and molecular species identification using ELISA CSP test and PCR methods, respectively. Results: Of the six Anopheles complexes and groups found during the study period, An. gambiae s.l. was the majority and represented 92.8% (64530/69527, p<0.001). Indoors, the bite rate was higher for An. gambiae s.l. (29.6 bites/person/night) than An. funestus (1.3 bites/person/night) and An. nili (0.1 bites/person/night). Similarly, the entomological inoculation rate (EIR) was higher in An. gambiae s.l. (1.1 infected bites/person/night) compared to An. funestus (0.1 infected bites/person/night) and An. nili (0.004 infected bites/person/night). The composition of related species within the three malaria vector was as follows: An. gambiae s.l. (58% An. coluzzii, 42.8% An. gambiae s.s.), An. funestus (91.9% An. funestus s.s., 6.8% An. leesoni, and 1.3% An. rivulorum-like) and An. nili (An. nili s.s.).Conclusion: The present study showed An. gambiae s.l. as the main contributor to malaria transmission in the Covè, Zagnanado, Ouinhi, districts. Secondary vector include An. funestus and An. nili group.
DOI: 10.33545/27080013.2024.v5.i2a.152
Pages: 36-44 | Views: 476 | Downloads:
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Boulais Yovogan, Clément Agbangla, Armel Djènontin, Constantin J Adoha, Esdras M Odjo, Roseric Azondekon, Landry Assongba, Juniace Ahoga, Juvénal M Ahouandjinou, Linda Towakinou, Eloi M Honvoh, Olivier Oussou, André Sominahouin, Ramziyath Agbanrin Youssouf, Kèfilath Badirou, Virgile Gnanguenon, Razaki Ossè, Gil G Padonou, Martin C Akogbéto. Contribution of different Anopheles vector complexes and groups to malaria transmission in the Covè, Zagnanado and Ouinhi districts, southern Benin. Acta Entomol Zool 2024;5(2):36-44. DOI: 10.33545/27080013.2024.v5.i2a.152
