NURSING ANM AND GNM

Detailed explanation-1: -A parasite is an organism that lives on or in a host organism and gets its food from or at the expense of its host.

Detailed explanation-2: -Parasites generally do not kill the host but may harm the host indirectly by spreading pathogens. This may affect the host’s behaviour, metabolism or its reproductive activity. Many parasites have hooks, claws or suckers to attach to their host.

Detailed explanation-3: -Parasitism is considered when an organism depends on other (host) for the food and shelter. Head louse feeds on the blood of humans from the scalp gets nutrition and shelter and also increase its generation. Thus, the correct answer is option D.

Detailed explanation-4: -Bacteria and viruses can live outside of the human body (such as on a countertop) sometimes for many hours or days. But parasites need a living host to survive. Bacteria and parasites can often be killed with antibiotics.