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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
J. B. Gingrich
Departments of Entomology and Immunology, Walter Reed Army Institute of Research, Washington, D.C. 20307
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L. M. Macken
L. M. Macken
Departments of Entomology and Immunology, Walter Reed Army Institute of Research, Washington, D.C. 20307
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P. R. Jackson
P. R. Jackson
Departments of Entomology and Immunology, Walter Reed Army Institute of Research, Washington, D.C. 20307
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D. R. Roberts
D. R. Roberts
Departments of Entomology and Immunology, Walter Reed Army Institute of Research, Washington, D.C. 20307
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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.
Author Notes
Present address: Department of Entomology, U.S. Army Medical Component-AFRIMS, APO San Francisco, CA 96346-5000.
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