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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Out of the vviral included in this study, There have been different serological tests, to try to assess the presence of infection in different arterutis 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.
Untilthere were no reported cases of the disease in Argentina and the virus had never been isolated in arrteritis from nasal swabs or abortions in horses suffering from respiratory or reproductive disorders.
Further spread of the virus was prevented by movement restrictions. Moreover, in some states such as Utah, the outbreak resulted in respiratory illness, abortions, neonatal pneumonia and death of several animals.
However, none of the symptoms reported the presence of reproductive or respiratory clinical signs consistent with those caused by EAV infection. A new group of positive-strand RNA viruses.
Equine viral arteritis – Wikipedia
Equine infectious diseases 2nd ed. International Veterinary Information Service www. Yet, since virus viability upon refrigeration or freezing is high, EAV can remain infective in frozen semen for long periods of time, even years Timoney, Vasculitis is characterized by fibrinoid necrosis of small arteries with extravasation of red blood cells and proteinaceous material.
Of these, 10 were thoroughbreds imported from the U.
It is necessary to mention that due to EVA is an exotic disease, vaccinations are not recommended in our country yet.
Additionally, due to shipping of semen or movement of mares, the outbreak spread to 18 states: Equine viral arteritis Chapter 2. Of these, 10 were thoroughbreds imported from the U. In experimentally infected horses, the breed has no apparent effect on susceptibility to infection or the establishment of carriers Neu et al.
Output of equine arteritis virus from persistently infected stallions is testosterone dependent, p. Fatal experimental equine arteritis virus infection of a pregnant mare: Virus isolation should be attempted using semen of two separate ejaculations, or mating two EAV-negative mares with the same stallion.
According to the World Animal Health Organization-OIE, 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, 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, The most widely used method for diagnosis is the evaluation of neutralizing antibodies, although the presence of such antibodies does not indicate active infection, but rather that the animal has been exposed to EAV.
Equine viral arteritis
It is therefore possible to isolate the virus in a wide variety of tissues and body fluids, making isolation of the virus possible 2 days post-infection in nasopharyngeal swab samples, 19 days in white cells, and up aryeritis 9 days in serum or plasma Figure 2.
J Reprod Fertility ; Molecular epidemiology and genetic characterization of equine arteritis virus isolates associated with the multi-state disease occurrence in the USA.
Since there is no specific arteriyis 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. It is very important to maintain strict hygiene and disinfection of instruments and equipment to minimize the risk of transmission of the virus. Although in Colombia, EVA is an exotic disease, some prevention and control measures have been widely reported, that can make infection a manageable disease, and most importantly, can reduce virral direct economic losses produced by disease outbreaks.
Additionally, import is also allowed of geldings that were negative between the ages of 6 and 12 months and werethenvaccinated. Output of equine arteritis virus from persistently infected stallions is testosterone dependent, p.
According to the World Animal Health Organization-OIE, 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, Among the animal health requirements for permanent entrance of horses into Colombia, ICA requires that stallions be negative after two viral neutralization tests carried out during the 28 days prior to shipment and a 14 day interval between them; for seropositive stallions, the requirement is that they have mated two seronegative mares biral remained negative after two neutralization tests, carried out first, the day of mating and second 28 days later.
Among the animal health requirements for permanent entrance of horses into Colombia, ICA requires that stallions be negative after two viral neutralization tests carried out during the 28 days prior to shipment and a 14 day interval between them; for seropositive stallions, the requirement is that they have mated two seronegative mares which remained negative after two neutralization tests, carried out first, the day of mating and second 28 days later.
Epidemiological status in America In America, the presence of EAV has been reported in different countries of South, Central vjral 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.
A vaccine is available in the UK and Europehowever in laboratory tests it is not possible to distinguish between antibodies produced as a result of vaccination and those produced in response to infection with the virus.
Given these figures, an infection could clearly be devastating to our susceptible populations and the risk is too high to be ignored. Bleeding was performed on all the horses in order to detect possible cases of seroconversion.
arteritis viral equina – English Translation – Word Magic Spanish-English Dictionary
EAVnegative mares should mate only with semen from EAV-seronegative stallions, but not with semen from carriers that could be infected. Additionally, the virus infects macrophages, which in conjunction with endothelial cell damage leads to increased release of proinflammatory cytokines that are heavily involved in the pathogenesis of “arteritis” Moore et al. Equine viral arteritis uniform methods and rules effective April 19, As for other members of the Equidae family, outbreaks have not been reported among donkeys or mules, and although antibodies have been identified, there is little information on the clinical signs observed in these species Timoney and McCollum, b.
Further properties of Equine Arteritis Virus. EAVnegative mares should mate only with semen from EAV-seronegative stallions, but not with semen from carriers that could be infected.
For females a negative result or stability of neutralizing titers in two serological, evaluated 28 days prior to shipment is required. A consolidated analysis of the results obtained between and showed that of samples tested, were positive 4.