UV Light and Roundworms

Killing properties of UV light depend on several factors

Presence of material that is blocking the radiation; time of exposure

Two forms of radiation

Gamma radiation and ultraviolet radiation

Gamma radiation

collides with molecules in the cell; creates free radicals

UV radiation

Kills by damaging and triggering mutations in DNA; damages retains of eye; convert atmospheric oxygen into ozone; most bacteria can be killed by UV

UV radiation limitations

Cannot go through plastic, glass; mainly used for killing microbes on surfaces, air, water

Ascaris lumbricoides

Fecal/oral; egg infective stage; human host

Enterobius vermicularis

Fecal/oral; egg infective stage; human host

Trichuris trichiura

Fecal/oral; egg infective stage; human host; always spiral whip like

necator americanus

Filariform larvae in soil mode of transmission; larvae infective stage; human host

Trichinella spiralis

Only parasite that travels to muscles; MOT eating pork; encysted larva infective stage; D host-human I host- pig

Loa loa

Mango fly bite MOT; microfiliarae infective stage; D host- human I host- mango fly

Wuchereria bancrofti

MOT mosquito bite; microfilariae infective stage; D host- human I host- mosquito

Elephantiasis

Extreme swelling of body parts

Onchocerca volvulus

MOT bite of black fly; microfilariae infective stage; D host- human I host- black fly

dracunculus medinensis

MOT drink water with water flea; larvae infective stage; D host- human I host- cyclops