The correct answer is: All of the above.
Foot-and-mouth disease (FMD) is a highly contagious and often fatal viral disease of cloven-hoofed animals. It is characterized by fever, lameness, and blisters on the mouth and feet. FMD is a major threat to livestock health and productivity, and can have a devastating impact on the livestock industry.
Avian influenza (AI) is a highly contagious viral disease of birds. It can cause a variety of clinical signs, including respiratory problems, diarrhea, and neurological disorders. AI can be fatal to birds, and can also be transmitted to humans.
Brucellosis is a bacterial disease that can affect a variety of animals, including cattle, sheep, goats, pigs, and deer. It can cause abortion, infertility, and reproductive problems in animals. Brucellosis can also be transmitted to humans, causing a variety of symptoms, including fever, fatigue, and joint pain.
All of these diseases are a threat to livestock health and productivity. They can cause significant economic losses, and can also have a negative impact on human health. It is important to take steps to prevent the spread of these diseases, including vaccinating animals, practicing good biosecurity, and reporting suspected cases to the authorities.