Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 404705
Title Infection of Anopheles gambiae mosquitoes with entomopathogenic fungi: effect of host age and blood-feeding status
Author(s) Mnyone, L.L.; Kirby, M.J.; Mpingwa, M.W.; Lwetoijera, D.W.; Knols, B.G.J.; Takken, W.; Koenraadt, C.J.M.; Russell, T.L.
Source Parasitology Research 108 (2011)2. - ISSN 0932-0113 - p. 317 - 322.
DOI http://dx.doi.org/10.1007/s00436-010-2064-y
Department(s) Laboratory of Entomology
PE&RC
Publication type Refereed Article in a scientific journal
Publication year 2011
Keyword(s) african malaria mosquitos - aedes-aegypti diptera - metarhizium-anisopliae - cuticular hydrocarbons - insecticide resistance - beauveria-bassiana - flight performance - nomuraea-rileyi - sephadex beads - culicidae
Abstract Physiological characteristics of insects can influence their susceptibility to fungal infection of which age and nutritional status are among the most important. An understanding of host–pathogen interaction with respect to these physiological characteristics of the host is essential if we are to develop fungal formulations capable of reducing malaria transmission under field conditions. Here, two independent bioassays were conducted to study the effect of age and blood-feeding status on fungal infection and survival of Anopheles gambiae s.s. Giles. Mosquitoes were exposed to 2¿×¿1010 conidia m-2 of oil-formulated Metarhizium anisopliae ICIPE-30 and of Beauveria bassiana I93-825, respectively, and their survival was monitored daily. Three age groups of mosquitoes were exposed, 2–4, 5–8, and 9–12 days since emergence. Five groups of different feeding status were exposed: non-blood-fed, 3, 12, 36, and 72 h post-blood feeding. Fungal infection reduced the survival of mosquitoes regardless of their age and blood-feeding status. Although older mosquitoes died relatively earlier than younger ones, age did not tend to affect mosquito susceptibility to fungal infection. Non-blood-fed mosquitoes were more susceptible to fungus infection compared to all categories of blood-fed mosquitoes, except for those exposed to B. bassiana 72 h post-blood feeding. In conclusion, formulations of M. anisopliae and B. bassiana can equally affect mosquitoes of different age classes, with them being relatively more susceptible to fungus infection when non-blood-fed.
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