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THE TOXIC EFFECT OF THE BITE AND THE PROTEOLYTIC ACTIVITY OF THE SALIVA AND STOMACH CONTENTS OF THE ROBBER FLIES (DIPTERA ASILIDAE)

于Israel Journal of Ecology and Evolution
著者:
D. KAHAN Department ofZoology, The Hebrew University of Jerusalem

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The salivary glands of Asilidae contain a venom toxic to locusts, mice and Paramecio. The toxicity of the venom of the various species is different. Venom contained in glands of one or two flies kills a white mouse of 20 g. 1/126 to 1/2 of a gland, according to the species, kills a locust (Locusta migratoria) of an average weight of one gram.

It seems that the venom has a neurotoxic effect, and causes symptoms in white mice, which resemble those caused by the venom of colubrid snakes.

A proteolytic activity has been shown in the saliva (pH. 4–9.4) and stomach juices (pH 2.4–9). One or both sources may be responsible for extra-intestinal digestion. No proteolytic activity was found in the labial glands.

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