There are a very few records of infection in cattle, usually as a result of a survey or other incidental testing. As this rarely causes illness in cattle there is usually no reason to look for evidence of exposure in these animals. As Q-fever spreads from animals to people, it is usually those people who work directly with them that would be at higher risk. This would include sheep and goat dairy farmers, slaughterhouse operators and veterinarians. In the case of Q-fever from cats it would be anyone who is in the proximity of infected cats when they give birth.
Most animals have the potential to carry illnesses that can spread to humans.
With respect to Q-fever, the precautions depend on the situation. Once purchased, the animals can be kept in isolation upon arrival to see whether they show signs of any illness that might affect other animals in the herd. Many people try to keep closed herds with their animals to minimize the entry of diseases. Though normally people don't use filter masks or gloves when working with animals this can be done if there is any concern over the possibility of transmission of such illnesses. Regular washing of clothes and hands also decreases the risk of disease.