The major disease threat to poultry in Odisha is:

Newcastle Disease
Foot and Mouth Disease
Brucellosis
Anthrax

The correct answer is: a) Newcastle Disease.

Newcastle disease is a highly contagious and often fatal viral disease of birds. It is caused by a virus of the genus Avulavirus, family Paramyxoviridae. The disease is characterized by respiratory, neurological, and reproductive problems. There is no specific treatment for Newcastle disease, and control measures are aimed at preventing the spread of the virus.

Foot and mouth disease is a highly contagious viral disease of cloven-hoofed animals, including cattle, pigs, sheep, and goats. It is caused by a virus of the genus Aphthovirus, family Picornaviridae. The disease is characterized by fever, lameness, and blisters on the mouth and feet. There is no specific treatment for foot and mouth disease, and control measures are aimed at preventing the spread of the virus.

Brucellosis is a bacterial disease that can affect humans and animals. It is caused by bacteria of the genus Brucella. The disease is characterized by fever, fatigue, and weight loss. There is no specific treatment for brucellosis, and control measures are aimed at preventing the spread of the bacteria.

Anthrax is a bacterial disease that can affect humans and animals. It is caused by bacteria of the genus Bacillus. The disease is characterized by fever, chills, and respiratory problems. There is no specific treatment for anthrax, and control measures are aimed at preventing the spread of the bacteria.

Newcastle disease is the major disease threat to poultry in Odisha because it is a highly contagious and often fatal disease. The disease is caused by a virus that is easily spread from bird to bird, and there is no specific treatment. Control measures are aimed at preventing the spread of the virus, such as vaccinating birds and keeping them in clean and well-ventilated areas.