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Invasion of the pathogenic fungus Metarhizium anisopliae through the guts of germfree desert locusts, Schistocerca gregaria

Dillon, R. J. and Charnley, A. K. (1986) Invasion of the pathogenic fungus Metarhizium anisopliae through the guts of germfree desert locusts, Schistocerca gregaria. Mycopathologia, 96 (1). pp. 59-66. ISSN 0301-486X

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Abstract

Less than 1% of an ingested inoculum of the pathogenic fungus Metarhizium anisopliae was retained for long enough (ca. 24 h) in the gut of the desert locust, Schistocerca gregaria, for germination and penetration to have occurred. The residual inoculum did not initiate an infection in guts of fed conventional or axenic locusts. However, symptoms of mycosis (hyphal bodies in the haemolymph, fungal penetration of the hindgut intima and epithelium, tetanic paralysis) were consistently observed in axenic but not conventional locusts which were starved post-inoculation. It is concluded that the antifungal toxin produced by the gut bacteria defends the desert locust against gut invasion by Metarhizium anisopliae during periods of starvation when the physical defences, prominent in fed insects, are less apparent.

Item Type: Article
Journal or Publication Title: Mycopathologia
Uncontrolled Keywords: Schistocerca gregaria ; Metarhizium anisopliae ; gut infection
Subjects: Q Science > QR Microbiology
Departments: Faculty of Health and Medicine > Biomedical & Life Sciences
ID Code: 57964
Deposited By: ep_importer_pure
Deposited On: 20 Oct 2012 01:15
Refereed?: Yes
Published?: Published
Last Modified: 20 Oct 2012 01:15
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/57964

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