Volume 30, Issue 3
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



The host range of was studied on Nantucket Island in order to identify the enzootic reservoir of this human pathogen. White-footed mice () were more frequently parasitized than were other indigenous animals. Infection was ubiquitous in locations where deer were abundant. Mice were most frequently parasitemic during spring and summer and adults more frequently than juveniles. Parasitemia, which was rarely intense, was sustained for as long as 4 months. Mice lived as long as 10 months, and juveniles were most abundant during early summer. Prevalence of zoonotic infection, in certain locations, appeared to be inversely correlated with abundance of mice. was present solely in regions harboring deer.


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