significant morphological but little molecular differences between trypanosoma of rodents from alaska.we examined blood smears of 173 rodents and 33 shrews captured at 4 sites in the gates of the arctic national park, northern alaska, in summer 2002. trypanosoma spp. were detected in the plasma of 5 microtus oeconomus, 4 microtus miurus, and 1 lemmus trimucronatus. the trypomastigote morphology from different individuals of m. oeconomus caught at the same site and of m. miurus from different sites varied significantly. the 4 dna sequences obtained from the blood smear positive samples contained ...200515856904
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