Parasitic worms (helminths)

Question 1

How do we get infected with geohelminths (soil transmitted nematodes)

Answer 1

ingestion of eggs with infective larvae
- ascaris and whipworms

Infective larvae penetrate skin
- hookworms and strongyloides

Question 2

Rectal prolapse

Answer 2

whipworm (trichuriasis)

Question 3

All of these live in Small intestine except for which one?

• Ascariasis
• Trichuriasis
• Hookworm
• Strongyloids

Answer 3

Trichuriasis
(whipworm)
- large intestine (embed)

Question 4

Autoinfection

Answer 4

strongyloidiasis
- burrow in small intestine mucosa

Pinworm
- F-O travel to perianal area at night

Question 5

Pin worm diagnosis

Answer 5

scotch tape

Question 6

Filariasis (wuchereria bancrofti)

- transmission

Answer 6

Female mosquito

Question 7

Onchocerciasis

- transmission

Answer 7

Female blackfly bite

Question 8

How does onchocerciasis cause blindness?

Answer 8

Takes 1 year for them to produce larvae.

Its the larvae that crosses your eyes that causes blindness.

Question 9

Trichinosis

• sx
• almost all cases are caused by what?

Answer 9

fever, vomiting, nausea, periorbital edema, myalgia
(cysts form in striated muscle)

• Eating wild meat, jerky, homemade sausage

Question 10

When shistosomiasis infects and eggs get layed,

• where do they get caught?
• What do you see with immune response?

Answer 10

Eggs get caught in intestines, bladder, liver
- tissue damage –> eggs get out on feces or urine

Immune response is cellular infiltration leading to granulomas

Question 11

Cysticercosis

- transmission?

Answer 11

eating food or drinking water that has tapeworm eggs in it (pork tapeworm)

Question 12

Where can cysticercosis cyst be found?

Answer 12

muscle, skin, eyes, brain