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MICROBIO Helminths
Helminths (worms): Flatworms & Roundworms
| Question | Answer |
|---|---|
| Platyhelminthes | Flatworms |
| Trematodes | Flukes |
| encysted larvae in raw crayfish are consumed by human host; burrows through intestines and such then lays eggs in the lungs, where they hatch and cycle repeats | Lung fluke |
| Lung fluke | Paragonimus westermanni |
| Schistosomiasis; Bilharzia found in water, the larvae burrow through the skin of the host and enter the capillaries | Blood fluke |
| flukes that live in large veins of the liver | Schistosoma mansoni |
| flukes that live in the large veins of the urinary bladder | Schistosoma japonicum |
| The ____ can hide from host immune cells by covering themselves with host proteins. | schistosomes |
| Cestodes | Flatworms |
| the human is a "definitive host" of the worm; the human host consumes encysted larvae in undercooked beef | Beef Tapeworm |
| Tapeworm that can be 18-20ft long; the human is a definitive host for it | Taenia saginata |
| human hands contaminated with eggs in dog feces or dog saliva are swallowed; houses larval forms only; but if cysts rupture, toxins are released and death is immediate | Hydatidosis (Cystic Hydatid Disease) |
| Cystic Hydatid Disease | Echinococcus granulosus |
| Aschelminthes | Roundworms |
| specific class of roundworms | Nematodes |
| infective eggs are excreted in human feces and can survive long periods in the soil until ingested by a host; these worms exit through any orifice of the body | Ascariasis |
| largest known parasitic worm that causes Ascariasis in humans | Ascaris lumbricoides |
| infective eggs deposited in the perianal area can contaminate the hands when the area is scratched; not as "devastating" | Pinworm |
| Pinworms found in the anus area | Enterobius vermicularis |
| hookworm larvae typically gain access to the human host by burrowing into the capillaries through the skin in the feet causes anemia | Hookworm (North American) |
| Hookworm; burrows through feet | Necator americanus |
| typically acquired by eating the encysted larvae in undercooked pork; causes heart damage | Trichinosis |
| Trichinosis | Trichinella spiralis |
| Filaria | Tissue nematodes |
| the filarial larvae are delivered via a mosquito vector | Elephantiasis (Wucheria bancrofti) |
| Onchocerciasis; the black fly (Similium spp.) acts as the vector | River Fever |
| Dracunculiasis; picked up by consuming contaminated water; seen in Africa | Guinea worm |
| larvae are transmitted by a mostquito vector; found in dogs; use de-worm medications | Dog "Heartworm" (Dirofilaria immitis) |
Created by:
kmonteci11o
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