Volume 10, Issue 2
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



The causative agent of Chagas' disease, , was found in 23 or 3.4% of 675 conenose bugs collected from 1936 to 1959 in New Mexico. Sixteen infected insects from Tyrone and two from Chaco Canyon were and five from Carlsbad Caverns were .

Naturally-infected mammals discovered by field xenodiagnosis were one male southern plains wood rat, , from near Tyrone; one male suckling white throated wood rat, , from 12.5 miles west of Carrizozo; and one female rusty antelope squirrel, , from Chaco Canyon.

White mice inoculated intramuscularly with bug feces equivalent to a single natural contaminative defecation acquired light transitory blood parasitemias. Microscopically undetected blood invasions of 9 experimental white mice were infective for 19 of 43 bugs used in xenodiagnosis. A 2-day-old white mouse injected intraperitoneally with one dropping from a naturally-infected Tyrone male was sacrificed on the 31st day. Tissue sections revealed a minimal focal interstitial myocarditis in association with groups of leishmaniform .


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