The Susceptibility of Howler Monkeys to Yellow Fever Virus

Hugo W. Laemmert Jr.
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Henry W. Kumm
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Summary

  1. 1. Two species of Brazilian howler monkeys were found to be highly susceptible to the Olímpio Cristo strain of yellow fever virus when transmitted by mosquito bite.
  2. 2. Four cyclic transmissions were obtained with A. scapularis and three with A. leucocelaenus.
  3. 3. The facility with which laboratory transmissions were obtained with A. scapularis suggests a possible explanation for the survival of virus in the winter months in south Brazil.

Author Notes

Field Staff Members, International Health Division, Rockefeller Foundation, 49 West 49th St., New York 20, N. Y.

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