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Effect of intestinal erythrocyte agglutination on the feeding performance of Triatoma brasiliensis (Hemiptera: Reduviidae)

Araujo, R. N., Pereira, M. H., Soares, A. C., Pereira, Idca, Diotaiuti, L., Gontijo, N. F., Lehane, Mike and Guarneri, A. A. (2009) 'Effect of intestinal erythrocyte agglutination on the feeding performance of Triatoma brasiliensis (Hemiptera: Reduviidae)'. Journal of Insect Physiology, Vol 55, Issue 9, pp. 862-868.

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Triatoma brasiliensis is an important vector of Trypanosoma cruzi in Brazil. The feeding efficiency on its hosts depends on several parameters including the maintenance of the ingested blood at low viscosity, which could be modulated by the anterior midgut (crop) anticoagulant and haemagglutinant activities. In the present study, we characterized T. brasiliensis crop haemagglutination activity and evaluated its importance in the feeding process. Soluble crop contents (SCC) of T. brasiliensis were able to agglutinate rat, mouse and rabbit eryhtrocytes, but had no activity on cattle and Thrichomys apereoides, a rodent species commonly associated with T. brasiliensis in the wild. The haemagglutination was characterized by the immediate formation of several clusters of erythrocytes connected by flexible elastic-like fibers. The feeding efficiency of T. brasiliensis on rat (agglutinated by SCC) was almost double that from T. apereoides (not agglutinated by SCC). The influence of haemagglutination on feeding was confirmed by artificially feeding bugs on a diet composed of cattle or rat erythrocytes. The bugs fed on cattle erythrocytes had lower ingestion rates in comparison to those fed on rats. The results indicate that, in addition to other parameters, haemagglutination brought about by SCC has an important role in the feeding efficiency of T. brasiliensis. (C) 2009 Elsevier Ltd. All rights reserved.

Item Type: Article
Additional Information: Araujo, Ricardo N. Pereira, Marcos H. Soares, Adriana C. Pereira, Iancor D. C. A. Diotaiuti, Lileia Gontijo, Nelder F. Lehane, Michael J. Guarneri, Alessandra A.
Subjects: QX Parasitology > Protozoa > QX 70 Mastigophora. (e.g., Giardia. Trichomonas. Trypanosoma. Leishmania)
WB Practice of Medicine > Medical Climatology > WB 710 Diseases of geographic areas
QX Parasitology > QX 4 General works
QX Parasitology > Insects. Other Parasites > QX 503 Hemiptera (e.g., Bedbugs)
WH Hemic and Lymphatic Systems > WH 20 Research (General)
WH Hemic and Lymphatic Systems > WH 100 General works
QY Clinical Pathology > Blood. Blood Chemistry > QY 450 Blood chemistry
Faculty: Department: Groups (2002 - 2012) > Vector Group
Digital Object Identifer (DOI):
Depositing User: Users 183 not found.
Date Deposited: 18 May 2010 10:17
Last Modified: 06 Feb 2018 12:59


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