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Quantity of dengue virus required to infect rhesus monkeys

Authors
Journal
Transactions of the Royal Society of Tropical Medicine and Hygiene
0035-9203
Publisher
Oxford University Press
Publication Date
Volume
79
Issue
2
Identifiers
DOI: 10.1016/0035-9203(85)90348-7
Disciplines
  • Medicine

Abstract

Abstract As part of a dengue vaccine study, it was necessary to determine how much virus was required to infect rhesus monkeys. Serial dilutions of dengue 2 and 4 viruses were inoculated subcutaneously into groups of five monkeys and seroconversions determined on days 30 and 60 post-inoculation. The viruses were also titrated simultaneously in LLC-MK 2 cells and mosquitoes. It was calculated that 9·5 mosquito infectious doses 50 (MID 50) of dengue 2 virus and 22 MID 50 of dengue 4 virus were required to infect 50% of the monkeys. The data suggest that 100 MID 50 of dengue virus should be used as a challenge dose for monkeys previously immunized with dengue vaccine.

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