Survivorship of Anopheles gambiae sensu lato in irrigated sugarcane plantation scheme in Ethiopia.

Publisher: BioMed Central Country of Publication: England NLM ID: 101462774 Publication Model: Electronic Cited Medium: Internet ISSN: 1756-3305 (Electronic) Linking ISSN: 17563305 NLM ISO Abbreviation: Parasit Vectors Subsets: MEDLINE

Original Publication: London : BioMed Central

Agricultural Irrigation* ; Saccharum*; Agriculture/*standards ; Anopheles/*physiology; Agriculture/methods ; Animals ; Anopheles/growth & development ; Ecosystem ; Ethiopia ; Female ; Male ; Mosquito Control ; Seasons

Background: To ensure food security, sub-Saharan Africa has initiated massive water resource development projects, such as irrigated agriculture, in recent years. However, such environmental modifications affect the survivorship and development of mosquitoes, which are vectors of different diseases. This study aimed at determining the effects of irrigation practices on development and survivorship of Anopheles gambiae s.l. in Ethiopia.
Methods: A life table experiment was conducted to examine the effect of environmental modification on survivorship of both immature and adult An. gambiae s.l. in irrigated and non-irrigated areas. The pupation rate and development time of the immatures and adult longevity and fecundity were compared between the two settings.
Results: The estimated mean survival time of female An. gambiae s.l. in the irrigated and non-irrigated areas was 37.9 and 31.3 days, respectively. A survival analysis showed that adult females of An. gambiae s.l. placed in an irrigated area lived significantly longer than those in a non-irrigated area (χ2 = 18.3, df = 1, P <0.001), and An. gambiae s.l. females lived significantly longer than males in both areas (P < 0.001).
Conclusions: Adult An. gambiae s.l. survivorship was found to be enhanced in the irrigated area compared to non-irrigated area. Longer survival of adult mosquitoes in irrigated areas could have important implications for vectorial capacity and hence malaria transmission.

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D43 TW001505 United States TW FIC NIH HHS; U19 AI129326 United States AI NIAID NIH HHS; D43 TW001505, R01 A1050243 and U19 AI129326 National Institutes of Health (NIH)

Keywords: Anopheles gambiae s.l.; Ethiopia; Irrigation; Land cover; Malaria; Sugarcane; Survivorship

Date Created: 20210307 Date Completed: 20210903 Latest Revision: 20211108

20221213

PMC7936430

10.1186/s13071-021-04630-8

33676562