Contribuição ao controle das infecções pelo herpesvírus bovino tipo 1 em rebanhos bovinos do Estado do Rio de Janeiro

Abstract

BHV-1, the agent of IBR, IPV and IPB, is spread among cattle and buffalo herds, bringing sanitary and economic losses to the livestock industry in Brazil and the world. These diseases can present clinical signs that fake Food-and-Mouth Disease and other vesicular diseases, and differential diagnosis in referenced laboratories is required. The high incidence is a hazardous risk for livestock, as the infection has an insidious character, with a subclinical form, generally unnoticed by the people involved with the cattle maintenance. As the control of the infection is required but there are few reasonable alternatives for the situation within Brazilian herds, we need new strategies for the control of the disease, which will be of major concern for fighting the infection in the world. Vaccines can t protect from infection and confuse diagnostics. Using attenuated vaccines a latent infection can be started. The disease will be the next sanitary barrier for the international trade of animals and products in the European Union. BHV-1 has been eradicated from Austria, Denmark, Finland, Sweden and Switzerland and control programs have started in some other countries. In the present research, we appreciated clinical and epidemiological aspects of the disease, evaluating the BHV-1 presence in Rio de Janeiro state. We have proposed a new method for the diagnostics of infected breeding cows, using the neutralization test in microplates with MDBK monolayers. We have evaluated the efficiency of passive immunization after colostrum ingestion. The effect of Kalanchoe brasiliensis extracts against BHV-1 in MDBK cells was evaluated. The control of the infection with homeopathic and phytotherapy therapeutics is proposed and the publications about BHV-1 vaccination were reviewed. Measures for the control of the infection in cattle herds from Rio de Janeiro State are suggested.