Three group A arboviruses, Sindbis (SIN), western (WEE) and eastern equine encephalitis (EEE), were selectively degraded with a nonionic detergent to yield a core particle and a soluble envelope component. Antigenic analysis by using radioimmune precipitation techniques revealed marked antigenic similarity among the core particles of the three viruses. The soluble envelope component exhibited a...

Abstract Paraguay has been severely affected by emergent Zika and chikungunya viruses, dengue virus is endemic. To learn more about the origins of genetic diversity epidemiologic history these viruses in Paraguay, we deployed portable sequencing technologies to strengthen genomic surveillance determine evolutionary epidemic arthropod-borne (arboviruses). Samples stored at National Central Labor...

This study analyses the content production about arboviruses on fan page of Brazilian Ministry Health before, during and after Zika virus epidemic. It uses a mixed methods that comprises analysis released from 2015 to 2017 Collective Subject Discourse workers who produced contents. The results show 649 out 5,732 posts collected addressed arboviruses, with greater focus prevention Zika. National...

Interference among group A arboviruses is described which does not involve the mediation of interferon. Interference was observed only if the interfering virus had an advantage over the challenge virus, either in time or in multiplicity of infection. Adsorption, penetration, and uncoating of challenge virus did not appear to be inhibited, but the synthesis of infectious viral ribonucleic acid o...

The Alphavirus genus within the Togaviridae family contains several important mosquito-borne arboviruses. Other than the antiviral activity of RNAi, relatively little is known about alphavirus interactions with insect cell defences. Here we show that Semliki Forest virus (SFV) infection of Aedes albopictus-derived U4.4 mosquito cells reduces cellular gene expression. Activation prior to SFV inf...

An expected consequence of climate warming is an expansion the geographical distribution biting insects and associated arthropod-borne viruses (arboviruses). Emerging re-emerging arboviruses that can affect human animal health are likely to pose significant consequences for Northern communities where access resources limited. In North American Arctic, little known about arboviruses. Thus, in 20...

Biting midges of the genus Culicoides transmit pathogens of veterinary importance such as bluetongue virus (Reoviridae: Orbivirus). The saliva of Culicoides is known to contain bioactive molecules including peptides and proteins with vasodilatory and immunomodulative properties. In this study, we detected activity of enzyme hyaluronidase in six Culicoides species that commonly occur in Europe a...

Biting midges of the genus Culicoides transmit pathogens of veterinary importance such as bluetongue virus (Reoviridae: Orbivirus). The saliva of Culicoides is known to contain bioactive molecules including peptides and proteins with vasodilatory and immunomodulative properties. In this study, we detected activity of enzyme hyaluronidase in six Culicoides species that commonly occur in Europe a...

Arboviruses are maintained in a natural cycle that requires blood-sucking arthropod and vertebrate hosts. Arboviruses are believed to persistently infect their arthropod host without overt pathology and cause acute infection with viremia in their vertebrate host. We have focused on elucidating how a specific arbovirus, Rift Valley fever (RVF) virus, causes cytopathic effect in cells derived fro...