AJTMH Transactions of the Royal Society of Tropical Medicine and Hygiene
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Am. J. Trop. Med. Hyg., 34(1), 1985, pp. 73-77
Copyright © 1985 by The American Society of Tropical Medicine and Hygiene

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Trypanosoma brucei rhodesiense: Enhancement of Infection Rates in the Tsetse Fly, Glossina morsitans, by Feeding Artificial Bloodmeal Mixtures*

J. B. Gingrich{dagger}, L. M. Macken, P. R. Jackson AND D. R. Roberts
Departments of Entomology and Immunology, Walter Reed Army Institute of Research, Washington, D.C. 20307

Low mature salivary gland (SG) infection rates (6%) in <24-hour-old flies fed on blood containing bloodform trypanosomes can be significantly enhanced by feeding flies an artificial mixture containing procyclic forms in a red cell: culture medium mixture (procyclic mixture, SG rate = 21.0%). However, enhancement is not solely a function of the use of procyclic forms since blood forms fed to flies in the same red cell: culture medium mixture produce SG rates (15.4%) intermediate to those of blood forms in blood and procyclic mixtures. Use of these artificial mixtures produces a similar result in 24- to 48-hour-old flies and also tends to equalize their infection rates with those found in <24-hour-old flies. The possible relationships between the different infection rates observed and digestive proteinases in the tsetse fly are discussed.

Accepted for publication June 18, 1984.


* In conducting the research described in this report, the investigators adhered to the "Guide for the Care and Use of Laboratory Animals" as promulgated by the Institute of Laboratory Animal Resources, National Academy of Sciences, National Research Council.


{dagger} Present address: Department of Entomology, U.S. Army Medical Component-AFRIMS, APO San Francisco, CA 96346-5000.






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Copyright © 1985 by the American Society of Tropical Medicine and Hygiene.