Volume 31, Issue 6
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



. The use of cyclophosphamide-treated mice for purposes of cloning the African trypanosomes was assessed. C3HeB/FeJ mice were injected with 200 mg/kg cyclophosphamide (CY) 24–72 hours prior to infection with a single trypanosome isolated from infected blood samples. All CY-treated mice exhibited depressed parasite-specific and antigen nonspecific B lymphocyte responses for a period of 10 days after CY exposure, which was a period of time sufficient to grow trypanosomes from a single organism to a fulminating parasitemia. Cloning efficiency was routinely 45% in these animals. Thus, our study demonstrates that CY-treated mice are a convenient and efficient vehicle for cloning African trypanosomes. Techniques which facilitate the selection of single trypanosomes from infected blood are also described in this report.


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