Infectious Rhinotracheitis

The main (but not sure) infectious aggressor on cattle farms is the IBR / IPV virus, present in over 90% of farms. It causes serious economic damage to farmers, through the mortality of calves and (not infrequently) adult animals or through frequent abortions. The losses are also indirect in nature, due to low milk production or poor milk quality.

Objective aspects, combat

We are dealing with an infectious disease which, in addition to early slaughter by decreasing growth spur, imposes costs on treatments, prophylaxis and control. To these losses is added the fact that the clinical healing of animals does not equate to economic recovery. Passed by the disease, the cattle remain underdeveloped and prone to recurrence, constituting at the same time, in shelters, permanent sources of infection, conditions that naturally determine the farmers to want to eliminate the sources of diminishing the profit.

Infectious bovine rhinotracheitis is a highly contagious infectious disease caused by bovine hypervirus (BHV-1). In addition to respiratory diseases, this virus causes conjunctivitis, vulvovaginitis, encephalitis and generalized systemic infections. Although clinical data may suggest IBR, pathological respiratory signs are not limited to IBR, requiring laboratory confirmation (ELISA tests for BHV-1 antibodies in serum or milk, histopathological examinations, RT-PCR, virus isolation on cell cultures).

“Some farmers can only aim to obtain high quality milk and others, in addition to milk, also produce genetic material for sale (calves or heifers and bulls). In the latter case, in order for young brood cattle to be sold, they must be free of IBR / IPV. When, through laboratory examinations, it has been established that there is a multifactorial etiology of the pathology in the respective cattle herd, it is much more effective to fight and eliminate the causes one by one, starting with the most harmful ones, even if the endemic process can be something. longer. In such situations, we start with the eradication of viruses, first of all with polysystemic ones such as IBR / IPV, BVD / MD, and will continue with those that affect certain devices (respiratory, digestive). However,. ” (Dr. Aurelia Ionescu, president of the Romanian Buiatrie Association)

Given that many infections with this virus are in a subclinical phase, control measures should focus more on eradicating the infection than on eliminating the symptoms. Vaccination of animals, both healthy (for protection against infections) and those already infected is the most effective way to eliminate and combat endemic viral infections.

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