Malaria is still a leading cause mortality in Côte d'Ivoire despite extensive LLINs coverage. We present the results of an entomological survey conducted in a coastal and in an inland village with the aim to estimate Anopheles gambiae sensu lato (s.l.) female's abundance indoor/outdoor and Plasmodium falciparum infection rate and analyze the occurrence of blood-feeding in relation to LLINs use. Pyrethrum spray (PSC) and window exit traps (WT) collections were carried out to target endophagic/endophilic and endophagic/exophilic females, respectively. Data on LLINs use in sampled houses were collected. (1) high levels of malaria transmission despite LLINs coverage >70% (~1 An. gambiae s.l. predicted mean/person/night and ~5% Plasmodium falciparum infection rate); (2) 46% of females in the PSC sample were blood-fed, suggesting that they fed on an unprotected host inside the house; (3) 81% of females in WT were unfed, suggesting that they were leaving the house to find an available host. Model estimates that if everyone sleeps under LLINs the probability for a mosquito to bite decreases of 48% and 95% in the coastal and inland village, respectively. The results show a high proportion of mosquito biting and resting indoors despite extensive LLINs. The biological/epidemiological determinants of accounting for these results merit deeper investigations.

A high proportion of malaria vector biting and resting indoors despite extensive LLIN coverage in Côte d’Ivoire / Tondossama, Naminata; Virgillito, Chiara; Ibrahima Coulibaly, Zanakoungo; Pichler, Verena; Dia, Ibrahima; DELLA TORRE, Alessandra; Offianan Touré, Andre; Maurice Adja, Akré; Caputo, Beniamino. - In: INSECTS. - ISSN 2075-4450. - 14:9(2023), pp. 1-12. [10.3390/insects14090758]

A high proportion of malaria vector biting and resting indoors despite extensive LLIN coverage in Côte d’Ivoire

Chiara Virgillito;VERENA PICHLER;Alessandra DELLA TORRE;Beniamino Caputo
2023

Abstract

Malaria is still a leading cause mortality in Côte d'Ivoire despite extensive LLINs coverage. We present the results of an entomological survey conducted in a coastal and in an inland village with the aim to estimate Anopheles gambiae sensu lato (s.l.) female's abundance indoor/outdoor and Plasmodium falciparum infection rate and analyze the occurrence of blood-feeding in relation to LLINs use. Pyrethrum spray (PSC) and window exit traps (WT) collections were carried out to target endophagic/endophilic and endophagic/exophilic females, respectively. Data on LLINs use in sampled houses were collected. (1) high levels of malaria transmission despite LLINs coverage >70% (~1 An. gambiae s.l. predicted mean/person/night and ~5% Plasmodium falciparum infection rate); (2) 46% of females in the PSC sample were blood-fed, suggesting that they fed on an unprotected host inside the house; (3) 81% of females in WT were unfed, suggesting that they were leaving the house to find an available host. Model estimates that if everyone sleeps under LLINs the probability for a mosquito to bite decreases of 48% and 95% in the coastal and inland village, respectively. The results show a high proportion of mosquito biting and resting indoors despite extensive LLINs. The biological/epidemiological determinants of accounting for these results merit deeper investigations.
2023
anopheles gambiae; plasmodium falciparum; west africa; bednet; malaria transmission
01 Pubblicazione su rivista::01a Articolo in rivista
A high proportion of malaria vector biting and resting indoors despite extensive LLIN coverage in Côte d’Ivoire / Tondossama, Naminata; Virgillito, Chiara; Ibrahima Coulibaly, Zanakoungo; Pichler, Verena; Dia, Ibrahima; DELLA TORRE, Alessandra; Offianan Touré, Andre; Maurice Adja, Akré; Caputo, Beniamino. - In: INSECTS. - ISSN 2075-4450. - 14:9(2023), pp. 1-12. [10.3390/insects14090758]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1696191
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