ECTOPARASITES.pptx

MAP

1. ECTOPARASITES Ectoparasites are the parasites that live outside the body LICE Three species of lice The head louse, pediculus (humanus) capitis The body louse, pediculus (humanus) corporis The crab louse, phthirus pubis, or public louse The eggs of the head and the pubic louse called nits are attached to the hair of the host and hatch there

2. Cont … Lice are transmitted from one host to another through close personal contact. They feed on human blood and can infest the human head, body and pubic are. The female louse produces a sticky substances that firmly attaches each egg to the base of a hair shaft. You can get lice by coming in contact with either lice or their eggs. E.g sharing combs, brushes, towels hats and other personal items.

3. FLIES they can spread disease because they feed firmly on human food and filt. The fly picks up disease causing organisms while crawling and feeding. With their diet of faeces , trash, rotting produce and spoiled meats, house flies constantly pick up pathogens. The insects then carry these germs and leave them behind wherever they land. The transfer process only takes a matter of seconds. Fleas transmit diseases while taking a blood meal from a human or animal host or via contaminated fecal pellets

4. scabies Scabies- a contagious, intensely itchy skin condition caused by a tiny, burrowing mite It is transmitted through skin-skin contact (handshakes or hugs) Prevention Avoid close, intimate contact with anyone Avoid touching or sharing clothes with people infected until they finish treatment.

5. Ticks Life cycle of a tick; most ticks go through four stages. Egg, six legged larva, eight legged hymph and adult . Female adult tick feed on its host. Such s a dog/cat The engorged females die after laying several thousand eggs The eggs hatch into the six legged larvae and attach to a host The engorged larvae detach from host and molts into nymph Nymphs attach to and feed of the larger host Engorged nymphs detach from host and molt into adults

6. Signs and symptoms Fever Chills Body ache and pain similar to the flue Fatigue Rash headache

7. How ticks are transmitted Coming in contact with ticks How they transmit disease Anaplasmosis(disease caused by bacterium anaplasma phagocytophilum) is transmitted to human by tick bites. Prevention Use chemical repellents Wear light coloured protective clothing Tuck pant legs into socks Avoid tick-infested area