BSE is defined as a slow developing neurodegenerative disease of cattle that begins insidiously with subtle signs progressing to terminal recumbency. This is a cerebral disease thus signs are consistent with abnormal mentation. Slight changes in behavior include increased apprehension and tactile and auditory hyperesthesia.
Bovine viral diarrhea virus (BVDV) is one of the most important infectious agents of cattle. The annual economic loss caused by BVDV is difficult to quantify but certainly is significant. The insidious nature of BVDV combined with the biology of the virus and complex disease pathogenesis has made control and prevention of this virus challenging.
Maybe this doesn't really fit "common" but it is always interesting to hear about cases. The main thing about rabies in cattle (and other species) is that signs are quite variable and inconsistent. Certain signs should be "red flags" for bovine rabies. Oftentimes cattle with rabies will have some history of hindlimb ataxia, weakness, or paralysis (this in itself is typical of many bovine diseases but for cattle exhibiting these signs, rabies should be considered).
Rural areas are clamoring for veterinarians, prompting universities and governments to find new ways to attract new blood to large-animal medicine. But what about rural practice is causing the shortage?
Bovine respiratory disease complex includes bacterial components, which cause the classic clinical signs of lethargy, depression, and fever, with variable nasal discharge, cough, or other signs. This bacterial component of BRD (most commonly Mannheimia haemolytica, Pasteurella multocida, Histophilus somni, and Mycoplasma bovis) may be treated with antimicrobial drugs designed to kill or inhibit the growth of the pathogenic bacteria.
One can usually find many sources of information about drugs: FDA website, drug company websites and technical reports, VIN, journals, trade magazines, and so on. The important skill required of veterinarians is to assess that information to determine its usefulness in your daily practice.
Drugs approved in the U.S. specifically for analgesia in cattle do not exist. There are guidance documents from the FDA Center for Veterinary Medicine for companies that would like to have an NSAID approved for pain relief
Recently, the use of antimicrobials in food animals has been scrutinized by the general public, by federal legislators, and by public health organizations. Some of these concerns relate to the use of antimicrobials as growth promotants, while some relate to the use of antimicrobials in food animals in general.
Pathogens differ in their virulence, contagiousness, and their modes of transmission. These differences exist not only between pathogens, but for virulence and contagiousness, can also differ between strains of the same species of pathogen.
Trichomoniasis, or "trich," is a disease that can cause devastating reductions in the percentage of cows exposed to a bull that successfully calve. The disease is caused by a protozoan parasite, Tritrichomonas foetus and the organism is transmitted by the act of mating.