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’.
|Published (Last):||27 January 2009|
|PDF File Size:||20.97 Mb|
|ePub File Size:||14.92 Mb|
|Price:||Free* [*Free Regsitration Required]|
There are considerable variations in the clinical symptoms and in severity of infection, and although many horses infected with EAV do not show symptoms, it has been demonstrated that experimental infection can be fatal Glaser et al.
Output of equine arteritis virus from persistently infected stallions is testosterone dependent, p. EVA multi-state outbreak in U. In paired samples carried out in all of the horses existing in the two farms, no infection was found,andthisdeterminedtheriseofhealthactivities and restrictive measures in the movement of horses movementrestriction DelaSota et al. The fear that a highly arteditis strain had emerged, joined with the belief that most horse populations are susceptible to the virus, led to an increased evaluation of the importance of the disease worldwide, imposing severe restrictions on the movement of horses with positive titers of antibodies against the virus Timoney and McCollum, a.
It is very important to maintain strict hygiene and disinfection of instruments and equipment to minimize the risk of transmission of artdritis virus. In the same breeder farm, the two remaining stallions were confirmed as positive, but only one showed light pyrexia and both excreted virus in the semen.
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.
Given the clinical similarity of EVA with other equine infectious and non-infectious diseases, any presumptive diagnosis should always be confirmed ciral laboratory tests Holyoak et al.
However, unlike other respiratory diseases, EAV can also be transmitted as a venereal disease during insemination, either by natural mating or artificial insemination, because the virus may be excreted in the semen, which is a major source of infection Figure 1. Virulent and avirulent strains of equine arteritis virus induce different quantities ofTNF-alpha and other proinflammatory cytokines in alveolarand equkna equine macrophages.
Although in Colombia, EVA is an exotic disease, some prevention and control measures arteriitis been widely reported, that can make infection a manageable disease, and most importantly, can reduce the direct economic losses produced by disease outbreaks.
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. There have been different artritis 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.
EVA is primarily a respiratory disease, transmitted through inhalation of eqkina particles between horses during the acute stage of infection mainly during transport of the animals for trade, exhibition or racing.
Equine viral arteritis
Horse diseases Animal virology. Acknowledgment The author thanks Dr. In total and associated with the first case, there were 30 reported abortions, representing about half the population of pregnant mares exposed to the first infected stallion Timoney et al.
EVA has cause significant economic loses; in the last years a strong multi-state outbreak reaches 18 states. Vet Pathol ; The presence of EVA must be suspected if respiratory symptoms are accompanied by abortions. Since there is no specific treatment for EVA, once the infection is confirmed clinical management should include rest, fluids and in some cases, broadspectrum antibiotics to reduce the risk of secondary bacterial infections.
However, temporal and geographic diversity aretritis EAV isolates has been demonstrated Murphy et al. Carrera 75 Of. Ann NYA cad Sci b; Temporal distribution of equine arteritis virus in eqiina mucosa, tissues and body fluids of horses equija by inhalation.
arteritis viral equina – English Translation – Word Magic Spanish-English Dictionary
The Veterinary Clinics of North America. In contrast, adult males are very likely to become carriers of the virus voral long periods of time and can transmit the virus to mares during mating Neu et al.
An active infection is diagnosed when high levels of antibodies in a single sample are found or when an increase in antibody titers occurs in two paired blood samples, obtained days apart Holyoak et al. Proceedings of the 5th Conf Equine Infec Dis; Genetic stability of equine arteritis virus during horizontal and vertical transmission in an outbreak of equine viral arteritis.
Inusing neutralization assays, out of 1, equine serum samples taken from 5 different states of Venezuela, 2. All vaccinated horses should receive yearly boosters to protect them against infection and in the case of stallions, to prevent the development of the carrier state.
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 argeritis virus has caused substantial economic losses and is today one of the main pathogens of veterinary importance Figure 3.
More than a century ago, reports were published in the European veterinary literature concerning a horse disease whose clinical features were consistent with those described for EVA. Virus clearance coincides with the development of specific neutralizing antibodies against EAV Timoney and McCollum, b.
Moreover, in some states such as Utah, the outbreak resulted in respiratory illness, abortions, neonatal pneumonia and death of several animals. Equine Respiratory Diseases, P. Rev Colomb Cienc Pecu ;