A major disease affecting livestock in Odisha is: *

Foot-and-mouth disease
Brucellosis
Peste des petits ruminants (PPR)
Avian Influenza

The correct answer is: a) Foot-and-mouth disease.

Foot-and-mouth disease (FMD) is a highly contagious viral disease that affects cloven-hoofed animals, including cattle, pigs, sheep, and goats. It is characterized by fever, lameness, and blisters on the mouth and feet. FMD is a serious disease that can cause significant economic losses to livestock producers.

Brucellosis is a bacterial disease that can affect a variety of animals, including cattle, sheep, goats, pigs, and dogs. It is characterized by fever, abortion, and arthritis. Brucellosis is a serious disease that can cause significant economic losses to livestock producers.

Peste des petits ruminants (PPR) is a viral disease that affects small ruminants, such as sheep and goats. It is characterized by fever, diarrhea, and respiratory problems. PPR is a serious disease that can cause significant economic losses to livestock producers.

Avian influenza is a viral disease that affects birds. It is characterized by fever, respiratory problems, and diarrhea. Avian influenza is a serious disease that can cause significant economic losses to poultry producers.

Foot-and-mouth disease is the most serious of these diseases and is the only one that is listed as a notifiable disease in Odisha. This means that all cases of FMD must be reported to the government so that they can be investigated and controlled.