These are called viral zoonoses or zoonotic infections. Major modern diseases such as Ebola virus disease and salmonellosis are zoonoses. Examples of zoonoses are Brucellosis, Q fever, leptospirosis, and toxocariasis. Diseases that can be transmitted from animals to humans are termed zoonoses. Infections that are transmitted from animals to humans are called zoonoses. Governments are particularly concerned with zoonoses, diseases that humans may acquire from animals. Some of these aspects include zoonoses, tropical infections, food hygiene, and vaccine studies. Some of the most important zoonoses are parasitic. Additionally veterinarians have important roles in public health and the prevention of zoonoses. Ectoparasites may be collected for studies of coevolution and zoonoses. Those that carry live animals and wildlife are at especially high risk of transmitting zoonoses. The WHO Expert Committee on Zoonoses listed over 100 such diseases.