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Species-specific DNA probes for the identification of African trypanosomes in tsetse flies

Published online by Cambridge University Press:  06 April 2009

W. C. Gibson ,
P. Dukes  and
J. K. Gashumba
W. C. Gibson
Affiliation:
Department of Pathology, University of Bristol, School of Veterinary Science, Langford, Bristol BS18 7DU
P. Dukes
Affiliation:
Tsetse Research Laboratory, Department of Veterinary Medicine, Langford House, Langford, Bristol BS18 7DU
J. K. Gashumba
Affiliation:
Tsetse Research Laboratory, Department of Veterinary Medicine, Langford House, Langford, Bristol BS18 7DU
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Summary

We have obtained 5 specific DNA probes for African trypanosomes of the subgenera Trypanozoon and Nannomonas. Each probe consists of one repeat unit of the major repetitive DNA (satellite DNA) of each species or intra-specific group. One probe hybridized with all members of subgenus Trypanozoon (except T. equiperdum which was not tested). In subgenus Nannomonas, one probe recognized T. simiae, but 3 probes were needed to identify all stocks of T. congolense available. Each of the 3 latter probes recognized trypanosomes from one of the 3 major groups of T. congolense previously defined by isoenzyme characterization, i.e. savannah, forest and Kenya coast types. As few as 100 trypanosomes could be unequivocally identified by dot blot hybridization and individual trypanosomes could be identified by in situ hybridization. We show how this simple methodology can be used in the field for the identification of immature and mature trypanosome infections in tsetse.

Type
Research Article
Information
Parasitology , Volume 97 , Issue 1 , August 1988 , pp. 63 - 73
Copyright
Copyright © Cambridge University Press 1988

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