The human louse, Pediculus humanus. P.19. The louse sucks blood through contact. There are two species of human lice: the head louse, Pediculus humanus capitis, which lives in the scalp hair and the body louse, Phcorporis, which lives on the body and clothes.

The crab louse, Phthirus pubis. P.3. The crab louse sucks blood and lives in the body hair of humans, especially on the abdomen. The crab louse is transmitted by intimate contact.

The bed bug, Cimex lectularius. P.41. The bed bug feed on human blood, which they suck from us at night. They are found in heated homes and are transmitted when infested house hold effect are moved.

The human flea, Pulex irritans. P.92. It is found in moist, dirty houses. It sucks blood from humans. It is rare and is transmitted by transfer of adult fleas and when moving infested household effects.

There are two species of follicle mites, Demodex folliculorum and Demodex brevis. P.123. They live in hair follicles, especially on the nose, feed on sebum and rarely causes symptoms. They are transmitted by body contact.

The itch mite, Sarcoptes scabiei. P.115. The itch mites feed on the top layer of the skin. They are especially found between fingers and on wrists. The itch mites are transmitted by intimate contact.