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CULICOIDES BITING MIDGES, ARBOVIRUSES AND PUBLIC HEALTH IN EUROPE
Author
Affilliation
The Pirbright Institute. Ash Road, Pirbright, Surrey GU24 0NF, UK.
Federal Research Institute for Animal Health. Institute for Novel and Emerging Infectious Diseases at the Friedrich-Loeffler-Institut. Insel Riems, Germany.
Cirad, UMR 15 CMAEE; INRA, UMR1309 CMAEE. 34398 Montpellier, France
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Rio de Janeiro, RJ, Brasil.
NERC Centre for Ecology and Hydrology. Bush Estate, Penicuik, Midlothian EH26 0QB, UK
Federal Research Institute for Animal Health. Institute for Novel and Emerging Infectious Diseases at the Friedrich-Loeffler-Institut. Insel Riems, Germany.
Cirad, UMR 15 CMAEE; INRA, UMR1309 CMAEE. 34398 Montpellier, France
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Rio de Janeiro, RJ, Brasil.
NERC Centre for Ecology and Hydrology. Bush Estate, Penicuik, Midlothian EH26 0QB, UK
Abstract
The emergence of multiple strains of bluetongue virus (BTV) and the recent discovery of Schmallenberg
virus (SBV) in Europe have highlighted the fact that exotic Culicoides-borne arboviruses from remote geographic
areas can enter and spread rapidly in this region. This review considers the potential for this phenomenon
to impact on human health in Europe, by examining evidence of the role of Culicoides biting
midges in the zoonotic transmission and person-to-person spread of arboviruses worldwide. To date,
the only arbovirus identified as being primarily transmitted by Culicoides to and between humans is Oropouche
virus (OROV). This member of the genus Orthobunyavirus causes major epidemics of febrile illness
in human populations of South and Central America and the Caribbean. We examine factors promoting
sustained outbreaks of OROV in Brazil from an entomological perspective and assess aspects of the epidemiology
of this arbovirus that are currently poorly understood, but may influence the risk of incursion
into Europe. We then review the secondary and rarely reported role of Culicoides in the transmission of
high-profile zoonotic infections, while critically reviewing evidence of this phenomenon in endemic
transmission and place this in context with the presence of other potential vector groups in Europe. Scenarios
for the incursions of Culicoides-borne human-to-human transmitted and zoonotic arboviruses are
then discussed, along with control measures that could be employed to reduce their impact. These
measures are placed in the context of legislative measures used during current and ongoing outbreaks
of Culicoides-borne arboviruses in Europe, involving both veterinary and public health sectors.
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