Variability of in vitro culture characteristics, including metacyclic trypomastigote production, in different stocks of Trypanosoma congolense
1991
Frame, I.A. | Ross, C. A. | Luckins, A.G.
Six cloned stocks of Trypanosoma congolense, isolated from the same area of Eastern Zambia, were maintained in vitro as insect form cultures producing infective metacyclic trypanosomes. Although the same general culture conditions were applied, different handling regimes were required for optimum growth of each stock. During primary isolation, many differences were found in the culture characteristics of the stocks. The time taken for cytoadherence to occur varied from 14 to 62 days, while the interval between attachment and the appearance of infective metacyclic trypanosomes ranged from 9 to 94 days. There was a 10-fold difference in the numbers of metacyclic forms produced by different stocks. Time in culture appeared to have little effect on the production of metacyclic forms, and it is probable that in vitro characteristics of T. congolense depend on the genetic constitution of individual stocks or clones.
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