ARTERITIS VIRAL EQUINA PDF
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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Moreover, in some states such as Utah, the outbreak resulted in respiratory illness, abortions, neonatal pneumonia and death of several animals. In addition, vaccination has been successfully used as a tool to control the spread of the disease during an outbreak, controlling the spread of infection and the severity of the symptoms Timoney, The signs shown depend on the horse’s age, the strain of the infecting virus, the condition of the horse and the route by which it was infected.
J Vet Diagn Invest ; 8: Subsequently, a second stallion developed pyrexia, but maintained adequate fertility. In paired samples carried out in all of the horses existing in the artdritis farms, no infection was found,andthisdeterminedtheriseofhealthactivities and restrictive measures in the movement of horses movementrestriction DelaSota et al. Other recent and larger studies identified two major groups of sequences confirming that South American strains equija multiple origins, one of them being European strains Metz et al.
For Latin American countries there arenotanofficialreportofprevalence due to there is only few studies and EAV serologic surveyofhorse’spopulationsdoesnotexist.
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 viealand 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.
The Veterinary Clinics of North America. In the UKit is a arteritiss disease. The increasing significance of international trade in equids and its influence on the spread of infectious diseases. Views Read Edit View history. Report of the Committee on Infectious Diseases of Horses: In contrast, adult zrteritis are very likely to become carriers of the virus for long periods of virla and can transmit the virus to mares during mating Neu et al.
Since EAV-negative and properly immunized stallions cannot be carriers, every negative foal under 9 months of age should be vaccinated.
According to a equine census, published by ICA, Colombia currently has a population of 1. Transmission EVA is primarily a respiratory disease, transmitted through inhalation of viral particles virak horses during the acute stage of infection mainly during transport of the animals for trade, exhibition or racing. When a carrier stallion is paired with vifal 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.
Vertical transmission can occur by the congenital route, and depending on how advanced the pregnancy is, the fetus can become infected, die and be aborted between 9 and 30 days after infection. 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.
Although the mare easily eliminates the virus, a pregnant EAV-infected mare cantransmit the virus tothe fetus.
Equine viral arteritis
In breeders and sites dedicated to reproduction, it is necessary to perform bleeding and serological assays of all horses prior to mating; viral isolation should also be attempted on imported semen before use. Vasculitis is characterized by fibrinoid necrosis of small arteries with extravasation of red blood cells and proteinaceous material.
Genetic characterization of equine arteritis virus during persistent infectionof stallions. Frequency of equine viral arteritis in Minas Gerais State, Brazil. Clinical, virological and epidemiological features of the out break of equine viral arteritis in the Thorough bred population in Kentucky, USA.
Fenner’s Veterinary Virology 5th ed. Given the clinical similarity of EVA with other equine infectious and non-infectious diseases, any presumptive diagnosis should always be confirmed equinaa laboratory tests Holyoak et al. Persistent infection of the reproductive tract in stallions experimentally infected with equine arteritis virus.
Untilthere were no reported cases of the disease in Argentina and the virus had never been isolated in samples from nasal swabs or abortions in horses suffering from respiratory or reproductive disorders.
arteritis viral equina – English Translation – Word Magic Spanish-English Dictionary
Horse diseases Animal virology. In America, the presence of EAV has been reported in different countries of South, Central and North America, mainly in Argentina, the United States and Canada where the virus has caused substantial economic losses and is today one of the main pathogens of veterinary importance Figure 3.
Based on their genetic structure and replication strategy, three additional viruses have been classified in the same genus and family.
However, the virus was not isolated untilduring an outbreak of abortions and respiratory illness in a “Standardbred” horse breeding ranch near Bucyrus, Ohio Doll, The most important outbreak of EVA in America occurred inwhen the disease struck many racing thoroughbred farms in Kentucky.
Carrera 75 Of. 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. Moreover, in some states such as Utah, the outbreak resulted in respiratory illness, abortions, neonatal pneumonia and death of several animals.
The natural reservoir of EAV infection is the carrier stallion, which ensures the permanence of the infection in equine populations. The presence of EVA must be suspected if respiratory symptoms are accompanied by abortions. Proceedings of the 5th Conf Equine Infec Dis; If it is the first time that the mare has been paired with a carrier stallion, the mare should be isolated from other horses for 21 days due to the possibility of virus dispersion trough traces of semen. 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 spread of the virus.
The natural reservoir of EAV infection is the carrier stallion, which ensures the permanence of the infection in equine populations.
Adult horses fully recover from the disease, leaving only the recovered stallions as carriers and sources ofinfection. From the epidemiological investigations carried out, it was concluded that the possible entry of the virus that occurred through a stallion imported incould have spread the infection to other susceptible horses on the farm.
The outbreak affected six premises and around horses were infected.
J Gen Virol ; Additionally it was concluded that EAV has a restricted geographic distribution inArgentina, being present in just a few provinces, equine categoriesand production systems due mainly to high risk factors such as horse importations De laSota et al.