Venezuelan equine encephalomyelitis

Classification according to ICD-10
A92.2	Venezuelan horse fever
ICD-10 online (WHO version 2019)

The Venezuelan equine encephalomyelitis (Engl. Venezuelan Equine Encephalitis , VEE) is a fatal viral disease of horses that like all Pferdeenzephalomyeliten notifiable animal diseases belongs. It can also be transmitted to humans ( zoonosis ) and can rarely cause a fatal disease.

Pathogen

Venezuelan Equine Encephalitis Virus
Systematics
Classification : Viruses Area : Riboviria Empire : Orthornavirae Phylum : Kitrinoviricota Class : Alsuviricetes Order : Martellivirales Family : Togaviridae Genre : Alphavirus Subgenus : Venezuelan equine encephalitis complex Type : Venezuelan Equine Encephalitis Virus
Taxonomic characteristics
Genome : (+) ssRNA linear Baltimore : Group 4 Symmetry : icosahedral Cover : available
Scientific name
Venezuelan Equine Encephalitis Virus
Short name
VEEV
Left
NCBI  Taxonomy: 11036 ViralZone ( ExPASy , SIB): 217 ICTV Taxon History: 201855111

The causative agent of the disease are viruses of the species Venezuelan Equine Encephalitis Virus (alias Venezuelan Equine Encephalomyelitis Virus , VEEV) from the genus Alphavirus of the Togaviridae family . This species, together with close relatives, forms a special group within this genus (VEEV group, English V enezuelan e quine e ncephalitis v irus complex ), to which u. a. also include the Rio Negro virus , Mucambo virus , Paramana virus, and Everglades virus . There are around six subtypes of VEEV, with only subtype 1 causing a serious disease and is therefore considered the actual pathogen. The animal disease occurs in South and Central America.

As the main vector act mosquitoes Culex tarsalis and Culex pipiens , it is also a contact infection with saliva of sick animals possible. Wild birds and rodents serve as virus reservoirs. Like pets, they are generally susceptible to the virus, but develop no or only mild symptoms.

clinic

Venezuelan equine encephalomyelitis, mouse brain infestation

The incubation period is 1 to 7 days. The disease is relatively unspecific. The virus is less neurotrophic than the other equine encephalomyelitis viruses. It often causes damage to blood vessels and can affect many organs. Clinically, fever , fatigue , reluctance to eat and, depending on the organ involvement, other symptoms occur.

The mortality in horses can be up to 80%, death usually occurs within 2-7 days.

As a rule, only mild clinical symptoms occur in humans, and the infection can be fatal in 1% of cases.

Combat

There is no effective therapy .

Web links

Commons : Venezuelan Equine Encephalomyelitis  - Collection of Pictures, Videos and Audio Files

Individual evidence

1. ↑ ICTV Master Species List 2018b.v2 . MSL # 34, March 2019
2. ↑ ^{a b c d} ICTV: ICTV Master Species List 2019.v1 , New MSL including all taxa updates since the 2018b release, March 2020 (MSL # 35)

This article is about a health issue. It is not used for self-diagnosis and does not replace a diagnosis by a doctor. Please note the information on health issues !