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Microbio Test 3 > export_gi cestodes parasites iii > Flashcards

export_gi cestodes parasites iii Flashcards

1
Q

Q

A

A

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2
Q

“Three basic structures of adult tapeworms”

A

Scolex - the rounded head of the worm (hooks/suckers)
“Neck” - the area from which new body segments are generated

Body (strobila) - long, segmented structure; individual segments are called proglottids

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3
Q

Which cestodes are adults in the human small intestine?

A

Taenia saginata
Taenia solium

Diphyllobothrium latum

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4
Q

Which cestodes are larvae in various tissues of the human?

A

Echinococcus granulosus

Taenia solium

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5
Q

Taenia saginata disease

A

Beef tapeworm

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6
Q

Taenia saginata transmission

A

Ingestion of undercooked beef with cysticerci

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7
Q

Taenia saginata infection

A

Humans generally infected with one worm

Can reach 10-30 ft, and live up to 25 years

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8
Q

Symptoms of Taenia saginata

A

Generally asymptomatic

Mild abdominal pain, feeling of fullness

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9
Q

Characteristics of Taenia saginata

A

Four suckers, no hooks

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10
Q

Taenia saginata diagnosis

A

Identification of proglottids or eggs in stool

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11
Q

Taenia solium disease

A

Pork tapeworm

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12
Q

Taenia solium transmission

A

Ingestion of undercooked pork containing cysts

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13
Q

Taenia solium extra-intestinal infection

A

Larvae hatch in intestines, then spread via circulation

Cysticercus creates a lesion that induces local inflammation - neurocysticercosis

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14
Q

Taenia solium diagnosis

A

Detection of proglottids or eggs in stool (intestinal)

CT scan, MRI, serology (extra-intestinal infection)

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15
Q

Characteristics of Taenia solium

A

Four suckers, hooks present

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16
Q

Diphyllobothrium latum disease

A

Fish tapeworm

17
Q

Diphyllobothrium latum transmission

A

Ingestion of raw or undercooked fish containing infectious larvae

18
Q

Diphyllobothrium latum symptoms

A

Asymptomatic and mild
Transient nausea, abdominal pain, diarrhea

Can result in intestinal obstruction

Can lead to macrocytic anemia

19
Q

Diphyllobothrium latum diagnosis

A

Eggs in stool

20
Q

Echinococcus granulosus disease

A

Dog tapeworm

21
Q

Echinococcus granulosus transmission

A

Humans are an accidental host

Exposure to dog feces

22
Q

Hydatid cyst

A

Formed by Echinococcus granulosus
Larvae secrete a hyaline membrane in the tissue they infect

Cysts can rupture, releasing a large amount of Ag, which can induce an anaphylactic response

23
Q

Echinococcus granulosus diagnosis

A

Presence of cyst, consistent history

24
Q

Trematodes disease

25
Q

Fasciolopsis buski disease

A

Intestinal flukes

26
Q

Fasciolopsis buski life cycle

A

Ingesting water or plants with encysted cercariae attached, travel to small intestine, excysting occurs, attaching to columnar epithelium and mature to egg-laying adults (hemaphroditic)

27
Q

Symptoms of light infection of Fasciolopsis buski

A

Focal inflammation, intermittent diarrhea

28
Q

Symptoms of heavy infection of Fasciolopsis buski

A

Continuous diarrhea, intestinal hemorrhage, ulceration, abscess formation

29
Q

Diagnose Fasciolopsis buski

A

Eggs in stool

30
Q

Fasciolopsis buski transmission

A

Snails are the vector, fecal-oral route

31
Q

Fasciola hepatica disease

A

Liver flukes

32
Q

Clonorchis sinensis disease

A

Liver flukes

33
Q

Liver flukes (F. hepatica) transmission

A

Ingestion of affected aquatic plants

34
Q

Liver flukes (C. sinensis) transmission

A

Ingestion of underprepared fresh water fish

35
Q

Liver flukes symptoms

A

Migration through liver results in hepatomegaly, tenderness, fever, eosinophilia, jaundice

36
Q

Diagnose liver flukes

A

Eggs in stool

Microbio Test 3 (14 decks)

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