Transstadial and Horizontal Transmission of Rift Valley Fever Virus in Hyalomma truncatum

Abstract

We exposed Hyalomma truncatum and Rhipicephalus appendiculatus to Rift Valley fever (RVF) virus in order to assess the possible role of these ticks as enzootic/epizootic RVF factors. The virus replicated in H. truncatum after intracoelomic inoculation, and a minimum transmission rate of 17% was achieved after 15 days intrinsic incubation. The virus persisted at least 58 days in these ticks. Virus was also shown to pass transstadially from inoculated H. truncatum nymphs to adults. Virus was recovered from adult females 121 days after they were inoculated as nymphs. RVF virus was not detected in pools of eggs and larval progeny from 11 infected female H. truncatum. H. truncatum larvae and nymphs did not become infected while feeding on a RVF viremic hamster. The number of infected specimens declined rapidly after RVF virus was inoculated into R. appendiculatus adults, and virus was undetectable 12 days post-inoculation. Reprints. (kt)

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1989
Accession Number
ADA218352

Entities

People

  • Charles L. Bailey
  • David J. Dohm
  • James R. Moulton
  • Kenneth J. Linthicum
  • Thomas M. Logan

Organizations

  • United States Army Medical Research Institute of Infectious Diseases

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Africa
  • Animals
  • Arthropod-Borne Encephalitis
  • Cells
  • Disease Outbreaks
  • Diseases And Disorders
  • Encephalitis
  • Infection
  • Infectious Diseases
  • Mauritania
  • Public Health
  • Rift Valley Fever
  • Rift Valleys
  • Rodents
  • Saharan Africa
  • Ticks
  • Viruses

Fields of Study

  • Biology

Readers

  • Vector-Borne Disease and Entomology
  • Virology (or Medical Virology).