Accession Number:

ADA218352

Title:

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

Descriptive Note:

Corporate Author:

ARMY MEDICAL RESEARCH INST OF INFECTIOUS DISEASES FORT DETRICK MD

Report Date:

1989-01-01

Pagination or Media Count:

6.0

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 enzooticepizootic 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

Subject Categories:

  • Biochemistry
  • Microbiology

Distribution Statement:

APPROVED FOR PUBLIC RELEASE