Volume 25, Issue 5
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



and are morphologically indistinguishable. Experiments to test the susceptibility of various mammalian hosts to these two guinea worm species are described. Infective 3rd-stage larvae of were administered to each of four raccoons (): infective 3rd-stage larvae of were administered to a rhesus monkey (), two dogs, two ferrets (), and a marten (). was not found in the raccoons when necropsies were performed on days 247, 283, 354, and 390 post-infection, respectively. Nine female containing eggs, embryos, and motile 1st-stage larvae were found in the rhesus monkey 180 days post-infection. Lesions had not formed and the larvae were presumed to be immature and not yet infective as they were comparatively inactive and attempts to infect suitable copepods failed. was not found in the dogs or the marten, although both ferrets were successfully infected. Variations in susceptibility of various mammalian species to the guinea worm are discussed together with comments on variations in migration routes and sites of emergence in hosts which may be partially refractory. and may represent physiological strains of a single species, or they may in fact be two distinct species which have evolved in different geographical locations.


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