PATHOLOGY

Detailed explanation-1: -The worm’s life cycle occurs within cattle and on grass. Worm reproduction occurs within cattle intestines. Eggs and the first two larval stages are found in feces. The third infective stage (L3) resides on grass, and the last two larval stages and adult worms are found inside the animal.

Detailed explanation-2: -Nasal myiasis is a chronic rhinitis and sinusitis caused by the larval forms of the botfly, Oestrus ovis. The botfly deposits eggs around the nostrils of sheep. The ova hatch and the larvae migrate throughout the nasal cavity and sinuses, feeding on mucus and debris.

Detailed explanation-3: -Ticks. Ticks are small arachnids that feed on the blood of mammals and are known to spread diseases among humans and animals.