[An evaluation of the spectrum of Plasmodium vivax subpopulations by the results of an experimental study of late relapses in Delhi].

The spectrum of Plasmodium vivax subpopulations could be evaluated by analyzing the results of experimental studies of late relapses in P. vivax malaria in north-western Delhi. The spectra of the subpopulations causing late recurrences were different for malaria with short-and longterm incubations. The conclusions previously made by mathematical stimulation as to that malaria with longterm incubation is mainly transmitted at the beginning of the season have been confirmed. Based on the results of the frequency analysis, 6 P. vivax subpopulations with the values of their development duration of 15, 240, 300, 390, 720, and 1020 days, respectively, were identified for formalization of an epidemic process.