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Immunology > Nemathelminthes > Flashcards

Nemathelminthes Flashcards

1
Q

Location of Enterobius vermicularis

A

intestinal/anal, adults in colon

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2
Q

Location of Trichuris trichiuria

A

intestine/colon, adults attach to colonic mucosa

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3
Q

Location of Ascaris lumbricoides

A

intestinal, soil

Adults free in upper intestine

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4
Q

Location of Necator americanus

A

intestinal soil

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5
Q

Location of Strongyloides stercoralis

A

intestinal soil

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6
Q

Location of Trichinella spiralis

A

muscle

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7
Q

Location of Toxocara canis

A

blood/tissue

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8
Q

Transmission of Enterobius vermicularis

A

direct egg fecal/oral

ingestion of eggs (direct person to person)

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9
Q

Transmission of Trichuris trichiuria

A

soil egg fecal/oral

ingestion of embryonated eggs

no drect person to person

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10
Q

Transmission of Ascaris lumbricoides

A

egg facal/oral

Ingestion of eggs from soil, no direct person to person

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11
Q

Transmission of Necator americanus

A

larva invades skin

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12
Q

Transmission of Strongyloides stercoralis

A

larva invades skins or autoinfective larvae

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13
Q

Transmission of Trichinella spiralis

A

undercooked pork

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14
Q

Transmission of Toxocara canis

A

soil egg fecal/oral

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15
Q

Definitive host of Enterobius vermicularis

A

Humans, no intermediate host needed

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16
Q

Epidemiology of Enterobius vermicularis

A

>200 million worldwise with >20 million in US

More prevalent in children, daycare centers, etc.

17
Q

Pinworm, species name

A

Enterobius vermicularis

18
Q

Pathology of Enterobius vermicularis (pinworm)

A

Itchy anus

Secondary infections from scratching

Rare bacterial infection in females due to urogential invasion

Psychological trauma

19
Q

Immunity of Enterobius vermicularis

A

None (reinfection is possible and common)

20
Q

Diagnosis of pinworm (Enterobius vermicularis)

A

Persistent perianal itch, restlessness, insomia

Confirm by observation of eggs (scotch tape test)

21
Q

Whipworm, species name

A

Trichuris trichiura

22
Q

Definitive host of Trichuris trichiura (whipworm)

A

Humans only

23
Q

Epidemiology of Trichuris trichiura (whipworm)

A

Up to 800,000 people infected worldwise

Tropical countries, poorer communities in South US

Poor public hygiene, use of human waste as fertilizer

24
Q

Diagnosis of whipworm (Trichuris trichuria)

A

Only by eggs in stool

25
Q

Definitive host of Ascaris lumbricoides

A

Humans

26
Q

Epidemiology of Ascaris lumbricoides

A

Up to 25% of people worldwide

Tropical and subtropical

Up to 4 million in the US, Appalachia, and south

Considered a US Neglected Disease of Poverty

Poor public hygiene, use of human waste as fertilizer

27
Q

Which of the worms enter the venous circulation to the lungs and are coughed up & swallowed?

A

Ascaris lumbricoides

Hookworm (Necator amercanus)

Strongyloides stercoralis

28
Q

Which worms, when stressed, can migrated to the nose, ear & peritoneal thru body wall?

A

Ascaris lumbricoides

29
Q

What is pruitus?

A

From hookworms

itch is defined as an unpleasant sensation of the skin that provokes the urge to scratch

30
Q

Which of the worms larva stage in the lungs can cause bronchitis?

A

Hookworm (Necator americanus)

31
Q

Which worm causes anemia?

A

Hookworm (Necator americanus)

32
Q

Larvae in the feces

A

Strongyloides stercoralis

33
Q

Rash on buttocks, legs and lower back due to autoinfection

A

Strongyloides stercoralis

34
Q
A

Immunology (9 decks)

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