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Journal of Experimental Biology 94,219-230 (1981)
Published by Company of Biologists 1981

The Role of the Salivary Glands in Feeding in Rhodnius Prolixus

J.M. C. Ribeiro ¹ and E. S. Garcia ²

¹ Departmento de Fisiologia, Universidade Federal Fluminense, Rua Professor Hernani de Mello 101, 24.210 Niterói, RJ, Brazil
² Departmento de Fisiologia, Universidade Federal FluminenseRua Professor Hernani de Mello 101, 24.210 Niterói, RJ, Brazil

The effect of salivarectomy on feeding in Rhodnius prolixus was studied. Salivarectomized insects drew less blood and at a lower rate than controls when fed on a rabbit. Operated insects also pierced host skin much more often (10 times in 5 min) than controls (1 or 2 times in 5 min). None of these differences was observed when feeding was performed artificially through latex membranes. Intradermal injection of salivary secretion in rat tails increased the duration of bleeding induced by small cuts made on the injection site. It is suggested that the antihaemostatic action of saliva is important for positioning of the maxillae inside blood vessels.

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