Degree Type

Dissertation

Date of Award

1988

Degree Name

Doctor of Philosophy

Department

Entomology

First Advisor

Wayne A. Rowley

Abstract

An acoustic actograph was used to study the influence of filarial worm infection on spontaneous flight activity of host mosquitoes;Aedes aegypti (black-eyed Liverpool strain) were infected with Brugia pahangi to evaluate the effect that filarial larvae developing in flight muscle have on flight activity. Even low numbers of filarial larvae (<10) inhibited flight, especially on days 8-10 postinfection. Parasite intensity was inversely correlated with flight activity and mosquitoes infected with more than 20 larvae could not sustain flight after day 8 PI. However, developing B. pahangi did not influence the circadian activity pattern of Ae. aegypti;Aedes aegypti were also infected with Dirofilaria immitis to determine if larvae developing in Malpighian tubules had any effect on flight activity of host mosquitoes. Flight activity of infected mosquitoes was decreased after day 8 postinfection. Parasite intensity was inversely correlated with flight activity after day 12 postinfection. The circadian pattern of activity of D. immitis-infected mosquitoes was similar to that of uninfected mosquitoes;Spontaneous flight activity of Aedes trivittatus infected with Dirofilaria immitis was studied to determine the effect of parasite infection on flight activity of a natural vector. The activity of mosquitoes infected with low numbers of filarial larvae (1-4) was similar to that of uninfected mosquitoes. However, mosquitoes infected with more than 4 larvae became more active than uninfected mosquitoes 8 days after infection. Infected mosquitoes were active during normal periods of quiescence. Flight activity of mosquitoes infected with more than 4 larvae was suppressed on days 10 and 14 PI, corresponding to the times of greatest disruption of Malpighian tubules by the developing larvae.

DOI

https://doi.org/10.31274/rtd-180813-12531

Publisher

Digital Repository @ Iowa State University, http://lib.dr.iastate.edu/

Copyright Owner

William Joseph Berry

Language

en

Proquest ID

AAI8909127

File Format

application/pdf

File Size

90 pages

Included in

Entomology Commons

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