ABSTRACT: The increase in sheep production is directly related to the health status of flock. Brazil one largest producers world, and flock concentrated southern northeast regions. Infectious diseases are responsible for severe economic losses resulting from a decrease milk meat production, deaths, cost treatment. Among infectious diseases, viral described chiefly case reports or retrospective ...

1. Bovine TB, caused by the bacterium Mycobacterium bovis (M. bovis), is a chronic, primarily respiratory, disease that can take a variable amount of time (from a few weeks to a lifetime) to develop from infection to clinical disease and to become infectious to other animals. The transmission rate between animals is low and the epidemic only progresses slowly: on average any infected animal is ...

foot-and-mouth disease (fmd) is a severely contagious viral disease that mainly affects cloven-hoofedlivestock and wildlife. this study quantifies the cytokines mrna expression of vaccinated guinea pigs withfmd type o inactivated vaccine. blood samples were collected from eight guinea pigs at 7 and 28 days after thefirst vaccination. extracted mrnas were reverse-transcribed into cdna and analyz...