Lack of evidence for laboratory and natural vertical transmission of bluetongue virus in culicoides sonorensis (Diptera

Ceratopogonidae)

C. J. Osborne, C. E. Mayo, B. A. Mullens, E. G. McDermott, A. C. Gerry, William Reisen, Nigel J Maclachlan

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Culicoides sonorensis (Wirth & Jones) is the principal North American vector of bluetongue virus (BTV). BTV infection of livestock is distinctly seasonal (late summer and fall) in temperate regions of the world such as California, which has led to speculation regarding vertical transmission of the virus within the midge vector as a potential mechanism for interseasonal maintenance ("overwintering") of the virus. To evaluate potential vertical transmission of BTV in its midge vector, we fed adult midges BTV-spiked blood and used a BTV-specific quantitative reverse transcriptase polymerase chain reaction assay to evaluate parent, egg, and progeny stages of laboratory-reared C. sonorensis for the presence of viral nucleic acid. Whereas BTV nucleic acid was weakly detected in egg batches of virus-fed female midges, virus was never detected in subsequent progeny stages (larvae, pupae, and F1 generation adults). Similarly, BTV was not detected in pools of larvae collected from the waste-water lagoon of a BTV-endemic dairy farm in northern California during the seasonal period of virus transmission. Collectively, these results indicate that BTV is not readily transmitted vertically in C. sonorensis, and that persistence of the virus in long-lived parous female midges is a more likely mechanism for overwintering of BTV in temperate regions.

Original languageEnglish (US)
Pages (from-to)274-277
Number of pages4
JournalJournal of Medical Entomology
Volume52
Issue number2
DOIs
StatePublished - Mar 1 2015

Fingerprint

Culicoides sonorensis
Ceratopogonidae
Bluetongue virus
Diptera
midges
Viruses
viruses
virus transmission
overwintering
Nucleic Acids
nucleic acids
Ovum
Larva
Pupa
larvae
Livestock
Virus Diseases
Waste Water
Reverse Transcriptase Polymerase Chain Reaction
dairy farming

Keywords

  • Bluetongue virus
  • Culicoides sonorensis
  • Overwintering
  • Vertical transmission

ASJC Scopus subject areas

  • Insect Science
  • veterinary(all)
  • Infectious Diseases
  • Parasitology

Cite this

Lack of evidence for laboratory and natural vertical transmission of bluetongue virus in culicoides sonorensis (Diptera : Ceratopogonidae). / Osborne, C. J.; Mayo, C. E.; Mullens, B. A.; McDermott, E. G.; Gerry, A. C.; Reisen, William; Maclachlan, Nigel J.

In: Journal of Medical Entomology, Vol. 52, No. 2, 01.03.2015, p. 274-277.

Research output: Contribution to journalArticle

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