PATHOLOGY

Detailed explanation-1: -The parasite lives on or in the body of the host. Examples of parasitism include interactions between vertebrate hosts and diverse animals such as tapeworm, flukes, the plasmodium species, and fleas. Worms attach themselves to the insides of the intestines of animals such as cows, pigs, and humans.

Detailed explanation-2: -Parasitism in Humans The organisms that parasitize humans include fungi, leeches, lice, viruses, protozoa, tapeworm, etc. Few organisms such as Helminthes live inside the intestine of the host and causes several infectious diseases, such as jaundice, malnutrition, diarrhoea, etc.

Detailed explanation-3: -An intermediate host often acts as a vector of a parasite to reach its definitive host (where it will become mature). Thus, the intermediate host serves only as a site wherein the parasite spends a particular developmental stage of its life cycle (i.e. larval stage).