Volume 18, Issue 1
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645


To the Editor:

An article published recently in the (July 1968) prompts me to write to you about the designation of strains of . In her article, “Active immunization of mice against : cross-resistance to a recently isolated strain” (this 516–521), Dr. Margaret L. Weiss specifies the plasmodial strains used in her experiments. She speaks of a strain, newly isolated after cyclic transmission through and baby hamsters, which she obtained from the University of Illinois, Urbana, and which she designates as the UG strain (Urbana gametocyte strain).

It was with astonishment that I read of the renaming and redesignation of this well-established and well-known strain of . This strain, employed by research workers at the University of Illinois, is the N.K. 65 strain and was obtained from our laboratory. The strain was originally isolated from wild captured in the Kisanga forest gallery (Katanga, Democratic Republic of the Congo) and maintained in our department by cyclic transmission.


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