Q.What is a pathogen? Name the parasites that causes

Filariasis causes inflammation in the lower limbs because the filarial worm lives and breeds in the lymphatic vessels of those limbs, blocking them and leading to swelling.

Filariasis is caused by the nematode Wuchereria.

Filariasis (elephantiasis) is caused by filarial worms Wuchereria bancrofti and Wuchereria malayi — thread-like nematode parasites that lodge in the lymphatic vessels of the human lymphatic system, transmitted by the bite of the female Cul …

Filariasis is caused by slender, thread-like filarial worms, chiefly Wuchereria bancrofti, transmitted through the bite of Culex mosquitoes.

Filariasis (also called elephantiasis) is a chronic lymphatic disease caused by parasitic, thread-like roundworms called filarial worms - mainly Wuchereria bancrofti (and also Wuchereria malayi/Brugia malayi). These worms live in the lymphatic vessels and lymph nodes of the human body, causing chronic inflammation and gross deformity/swelling, most typically of the legs and external genitalia (hence the common name 'elephantiasis').

…

Pathogen = Wuchereria bancrofti; phylum = Aschelminthes (Nematoda).

Concept. Elephantiasis (lymphatic filariasis) is caused by the filarial worms Wuchereria bancrofti and W. malayi. These slender threadlike worms live in the lymphatic vessels and lymph nodes, blocking lymph drainage and causing gross swelling of the limbs and lower body (the 'elephant-leg' appearance). They are transmitted by the bite of infected female *Cule …

Elephantiasis is caused by thread-like filarial nematode worms (Wuchereria bancrofti/W. malayi) that block the lymphatic vessels.

These slender, thread-like round worms live in the human lymphatic system (lymph vessels/nodes), and the disease is transmitted from person to person by the bite of female Culex mosquitoes acting as the vector. Chronic infection causes long-term inflammation and eventual blockage of lymphatic drainage, most visibly in the legs and external geni …

Wuchereria bancrofti is a parasitic filarial worm (helminth), so the answer is (D).

Filariasis (elephantiasis) is caused by the filarial worms Wuchereria bancrofti and Wuchereria malayi. These are thread-like parasitic round worms belonging to the group Helminths.

…

Elephantiasis is a chronic, disfiguring disease caused by parasitic filarial worms of the genus Wuchereria, which lodge in and block the lymphatic vessels, causing gross swelling of the affected limbs.

Reasoning

Elephantiasis (filariasis) is caused by slender, thread-like filarial worms of the genus Wuchereria (mainly W. bancrofti, and also W. malayi), which are transmitted between humans through the bite of certain mosquito vectors (e.g. Culex mosquitoes). The adult worms lodge in the lymphatic vessels of the limbs and the genital organs, causing chronic inflammation and obstruction of lymph flow, which leads over years to gross swelling (oedema) and thicke …

Wuchereria bancrofti causes filariasis (elephantiasis), a chronic lymphatic disease transmitted by mosquitoes.

Wuchereria bancrofti (along with the closely related W. malayi) is a parasitic filarial nematode (roundworm) responsible for the disease filariasis, also commonly called elephantiasis. The disease is transmitted from person to person through the bite of an infected mosquito vector.

…

Filariasis (elephantiasis) is caused by the filarial worm Wuchereria bancrofti, transmitted through mosquito bites, causing chronic lymphatic inflammation and limb swelling.

Filariasis (also called elephantiasis) is a slow-developing, chronic inflammatory disease caused by parasitic filarial worms, chiefly Wuchereria bancrofti (and W. malayi), which are nematodes (roundworms). These worms are transmitted from person to person through the bite of an infected mosquito vector (species of Culex).

…