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Parasite. 2004 Mar;11(1):103-6.

Trypanosoma vivax: a simplified protocol for in vivo growth, isolation and cryopreservation.

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Institute of Tropical Medicine, Department of Parasitology, Nationalestraat 155, B-200 Antwerp, Belgium.


A rodent adapted clone of Trypanosoma vivax was used to infect cyclophosphamide treated mice and rats. Fresh blood containing trypanosomes, was centrifuged in a density gradient of three Percoll solutions, 1.07, 1.06, 1.05 g/ml, respectively, carefully layered on top of each other. The yields of this simple procedure for trypanosome purification were about six times higher than those obtained with the conventional anion-exchange columns. Cryopreservation of trypanosomes using glycerol yielded 90% viable parasites, whereas using dimethylsulfoxide, a more commonly used cryoprotectant, the viability was only 35%.

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