Serologic evidence of exposure to influenza D virus among persons with occupational contact with cattle.


Journal Article

BACKGROUND: Influenza D virus (IDV), a novel influenza virus with proposed classification: family Orthomyxoviridae, genus Influenzavirus D, species Influenza D virus, has been associated with influenza-like illness in cattle and swine. More recently, anti-IDV antibodies have also been detected in small ruminants. A seroprevalence of approximately 1.3% has been estimated for the general human population. OBJECTIVES: To gain insights on the zoonotic potential of IDV to human adults with occupational exposure to cattle in north central Florida. STUDY: A cross-sectional serological study was performed on human serum samples from 35 cattle-exposed and 11 non-cattle-exposed adults to screen for IDV antibodies using hemagglutination inhibition (HI) and microneutralization (MN) assays. RESULTS: A seroprevalence of 91% was detected via HI assay, and 97% by MN assay among individuals working with cattle in Florida. Among non-cattle-exposed individuals, seropositivity determined via MN assay (only) was lower (18%). CONCLUSIONS: IDV poses a zoonotic risk to cattle-exposed workers, based on detection of high seroprevalence (94-97%). Whereas it is still unknown whether IDV causes disease in humans, our studies indicate that the virus may be an emerging pathogen among cattle-workers.

Full Text

Duke Authors

Cited Authors

  • White, SK; Ma, W; McDaniel, CJ; Gray, GC; Lednicky, JA

Published Date

  • August 2016

Published In

Volume / Issue

  • 81 /

Start / End Page

  • 31 - 33

PubMed ID

  • 27294672

Pubmed Central ID

  • 27294672

Electronic International Standard Serial Number (EISSN)

  • 1873-5967

Digital Object Identifier (DOI)

  • 10.1016/j.jcv.2016.05.017


  • eng

Conference Location

  • Netherlands