a) Name the causative agent of each of the following livestock diseases: (i) food and mouth; (ii) rinderpest; Newcastle (b) Name three animals that can be a...

a) The causative agent of the following livestock diseases are:

• Foot and Mouth Disease: virus (Picornaviridae family)
• Rinderpest: virus (Morbillivirus genus)
• Newcastle Disease: virus (Paramyxoviridae family)

b) The following animals can be affected by the listed diseases:

• Foot and Mouth Disease: cattle, pigs, sheep, goats, and other cloven-hoofed animals
• Rinderpest: cattle, buffaloes, and other cloven-hoofed animals
• Newcastle Disease: poultry (chickens, turkeys, etc.), pigeons, and other birds

c) The symptoms of the listed diseases are:

• Foot and Mouth Disease: fever, blisters or sores in the mouth, on the tongue, and on the feet and teats of animals, loss of appetite, and lameness.
• Rinderpest: fever, diarrhea, discharge from the eyes and nose, ulcers in the mouth, and dehydration.
• Newcastle Disease: respiratory distress, sneezing, coughing, greenish diarrhea, and nervous signs such as twisting of the neck and paralysis.

These symptoms can lead to severe illness, economic losses, and mortality among the affected animals. It is important to prevent the spread of these diseases by implementing strict biosecurity measures, vaccination, and prompt reporting of any suspected cases to veterinary authorities.