Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Microbiology > Helminths > Flashcards

Helminths Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

What would be a characteristic finding in a CBC for any worm infection? Why?

A

Eosinophilia

Eosinophils kill worms/parasites

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

If a patient has eosinophilia and infiltrates on CXR, what needs to be considered as a differential?

A

Pneumonic phase of a parasitic infection

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How does the path to the lung differ between Necator americans (hookworm) and Ascaris lumbricoides?

A

Necator americans- Can penetrate foot-> lung

Ascaris lumbricoides- From intestine-> lung

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Which of the roundworm infections will NOT present with eggs in a stool sample?

A

Strongyloides stercoralis- only larvae in stool

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What organism is classically acquired from eating undercooked pork?

A

Trichinella spiralis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What type of worm infections do NOT have an elevated eosinophil count? Why?

A

Trichuris trichiura and Enterobius vermicularis (whipworm and pinworm).
Because there is no transit outside the intestine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What organism is diagnosed by the “scotch tape” test?

A

Enterobius vermicularis (pinworm)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What organism causes river blindness? What is the vector?

A

Onchocerca volvulus

Black flies

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What organisms cause elephantiasis? Vector?

A

Wuchhereria bancrofti and Brugia malayi

Mosquito vector

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is Nocturnal periodicity? What disease has this phenomenon?

A

Few organisms circulate in daylight hours

Elephantiasis dx via microfilariae in blood at night

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What type of worm is removed by slowly twisting it around a stick until it is out?

A

Dracunculus medinensis (Guinea worm)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the animal host of blood flukes?

A

Snails

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What kind of helminth can lead to a Vitamin B12 deficiency?

A

Diphyllobothrium datum (Fish Tapeworm) absorbs B12

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What tapeworm has no intermediate hosts?

A

Hymenolepis nana (Dwarf tapeworm)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What tapeworm infection is commonly associated with seizures in adults? How is it transmitted?

A

Neurocysticercosis- Taenia solium (Pork Tapeworm)

Transmitted via ingestion of larvae in undercooked pork

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What organism causes fluid-filled hyatid cyst formation, especially in the liver?

A

Echinococcus (Extraintestinal tapeworm)

17
Q

What is the main symptom of Enterobius vermicularis?

A

Anal pruritis (pinworm)

18
Q

What worms can grow large enough to cause an intestinal obstruction?

A

Ascaris lumbricoides

19
Q

What protozoa has characteristic football-shaped eggs?

A

Trichuris trichuria (whipworm)

20
Q

What organism is associated with elevated creatanine kinase levels after eating undercooked pork?

A

Trichinella spiralis

21
Q

How is Wuchereria bancrofti transmitted?

A

Microfilariae transmitted by female mosquito

22
Q

What is the beef tapeworm called? How does it usually present?

A 
Taenia saginata 
Usually asymptomatic (can have weight loss)
23
Q

What is the tapeworm called that comes from raw fish? What animals does it travel through before humans?

A

Diphyllobothrium latum

Eggs in water are ingested by a crustacean-> ingested by freshwater fish-> ingested by human

24
Q

Schistosoma in the Middle East tends to be associated with what?

A

Squamous cell carcinoma of the bladder

25
Q

What roundworm infection is acquired from eating eggs in food?

A

Ascaris lumbricoides

26
Q

What is the enterotest? What is it used to diagnose?

A

Long nylon string is swallowed and later pulled out of the mouth, may have larvae on it. For Strongyloides stercoralis dx (no eggs in stool).

27
Q

What is the intermediate host of Dracunculus medinensis?

A

African and Asian freshwater copepods (crustaceans)

28
Q

What is Katayama fever? What causes it?

A

Follows schistosomal infection as the adults begin to lay eggs-> fever, hives, HA, cough, weight loss.

29
Q

What tapeworm are humans dead-end hosts for? What perpetuates its life cycle?

A

Echinococcus granulosus- Extraintestinal tapeworm

Dogs and sheep

30
Q

How do the heads (scolex) of the beef and pork tapeworm differ?

A

Taenia solium has hooks (pork)

Taenia saginata has suckers (beef)

31
Q

What organism causes hydatid cyst formation?

A

Echinococcus (extraintestinal tapeworm)

Microbiology (7 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions