ARTERITIS VIRAL – Free download as Powerpoint Presentation . ppt), PDF File .pdf), Text File .txt) or view presentation slides online. Equine viral arteritis (EVA) is a contagious viral disease of equids caused by equine arteritis virus. (EAV), an RNA virus classified in the genus, Arterivirus, family. English Translation, Synonyms, Definitions and Usage Examples of Spanish Word ‘arteritis viral equina’.

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J Eq Vet Sci ; 8: All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License. According to the World Animal Health Ateritis, a carrier stallion has serological positive for antibodies to the virus using the virus neutralisation test or an appropriately validated enzyme-linked immunosorbent assay ELISA and also positive virus isolation from the semen Timoney, Res Vet Sci ; Multi-state occurrence of EVA.

The background in the Latin American countries presented above highlights the importance of serological surveillance, which informs us that a new agent has come in contact with the susceptible population of horses, and allows us to establish preventivemeasures toavoid arteritiw of the virus.

Equian of the one-hundred tenth annual meeting of the United States animal health association. J Gen Virol ; In Octoberof three stallions imported to Argentina, one was seropositive, so that the farm was restricted and required sanitation. Further characterization of the carrier state in stallions. The virus can be excreted by nasal secretions until 16 days post-infection, and this is a source of infection for horses that are in closecontact McCollum, When a carrier stallion is paired with a positive mare or with a vaccinated mare, both mares should be isolated for 24 hours after mating to prevent mechanical transmission of the virus through traces of semen.

Given the clinical similarity of EVA with other equine infectious and non-infectious diseases, any presumptive diagnosis should always be confirmed by laboratory tests Holyoak et al.


Carrier stallions constantly eliminate the virus in the semen and consequently the risk of transmission of infection is limited to the time of mating. Molecular epidemiology and genetic characterization of equine arteritis virus isolates associated with the multi-state disease occurrence in the USA. Vasculitis is characterized by fibrinoid necrosis of small arteries with extravasation of red blood cells and proteinaceous material.

J Reprod Fertility Suppl ; EAV distribution in America.

There are a number of routes of transmission of the virus. Vet Pathol ; EAV distribution in America. Virus clearance coincides with the development of specific neutralizing antibodies against EAV Timoney and McCollum, b.

Equine Viral Arteritis: epidemiological and intervention perspectives

In this site and during the implementation of these health activities a high serological prevalence was detected and the two other stallions were confirmed by biological assays as virus reservoirs and were consequently castrated to prevent the spread of the infection Dela Sota et al. The virus can also be spread by the venereal route, including by artificial insemination.

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After the initial infection males can become persistently infected carriers scattering infection through semen, a situation that brings indirect economic losses by restrictions on international trade of horses and semen from breeding and from countries at risk of infection with the virus.

Equine viral arteritis

Arq Bras Med Vet Qrteritis ; Twenty-eight days after mating, serological surveys should be performed on the mares to determine if neutralizing antibodies against EAV have developed Holyoak et al. Carrier stallions should mate only with EAVpositive or properly vaccinated mares. This outbreak led to two very important findings regarding the EVA: It has been more common in some breeds of horses in vigal United Statesbut there is no breed “immunity”. In Octoberof three stallions imported to Argentina, one was seropositive, so that the farm was restricted and required sanitation.

The author thanks Dr.

Given these figures, an infection could clearly be devastating to our susceptible populations and the risk is too high to be ignored. Euqina status in America. There have been different serological tests, to try to assess the presence of infection in different areas and horse populations fromArgentina, most of them yielding negative results, such as in breeders that had imported horses to Argentina sinceand also in horses present in farms adjacent in a radius of 10 km to the first farm in which the infection was first detected De la Sota et al.

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Virus reservoir The natural reservoir of EAV infection is the carrier stallion, which ensures the permanence of the infection in equine populations. artertiis

If the results of blood tests are positive for a stallion, but there is no official documentation of a negative state prior to vaccination, the stallion should be analyzed to determine its possible carrier state. Further characterization of the carrier state in stallions. Am Assoc Equine Pract Report a;7. In contrast, adult males are very likely to become carriers of the virus for long periods of time and can transmit the virus to mares during mating Neu et al.

Carrera 75 Of. Moreover, in some states such as Utah, the outbreak resulted in respiratory illness, abortions, neonatal pneumonia and death of several animals. The Merck Veterinary Manual. Persistent infection of the reproductive tract in stallions experimentally infected with equine arteritis virus. Fatal experimental equine arteritis virus infection of a pregnant mare: This is not to mention the importance of exports which during the same period was over USD J Equine Vet Sci a; Vet Pathol ; Of these, 10 were thoroughbreds imported from the U.

The outbreak affected six premises and around horses were infected.