Intestinal nematodes (Part 1) Flashcards Preview

Mycology > Intestinal nematodes (Part 1) > Flashcards

Flashcards in Intestinal nematodes (Part 1) Deck (17):
1

List the common name for the Ascaris.

None

2

Diagnostic form of Ascaris.

Eggs/ eggs ingested from oil, food, water

3

Describe the microscopically appearance of Ascaris.

-Oval eggs, often stain brown in stool
-Infertile eggs are elongated, bizarre shaped (no male present)
-Mammilated coat (decorticated= lost coat)

4

List the common name for the Ancylostoma duodenale.

Hookworm. (old world)

5

List the common name for the Necator americanus.

Hookworm. (new World)

6

Diagnostic form of Hookworm and describe the microscopically appearance.

Eggs in stool- oval, colorless, thin-shelled
Filariform larvae- pointed tail
Rhabditiform larvae- bulb in some area and longer buccal cavity.
Adult

7

Differentiate Ancylostoma and Necator in diganosis of hookworm adults.

Ancylostoma has two pairs cutting teeth
Necator has cutting plates

8

List the common name for the Strongyloides stercoralis

Threadworm

9

Diagnostic form of Strongyloides stercoralis.

Rhabditiform Larvae; eggs rarely seen in stool (if eggs are ever seen that resembles hookworm)

10

Microscopic appearance of Larvae see in Stronglyoides stercoralis.

Rhabditiform larvae seen in stool- short buccal cavity and large genital primordium ("short & sexy)
Filariform larvae-notched tail

11

List the common name for Enterobius vermicularis.

Pinworm (sharply pointed tail of female)

12

Diagnostic form of Enterobius vermicularis.

No fecal specimen (eggs not usually seen in feces).
cellophane tape preparation or paddle.
Lay eggs outside anus at night

13

Describe the microscopic appearance of Enterobius vermicularis: Adult female and Eggs.

Adult female= pointed tail (male tail is curved, alae (3 lips)
Eggs oval, slightly flattened, with thin, smooth, colorless shell. Usually internal larvae can be see.

14

List the common name for Trichuris trichiura.

Whipworm

15

The diagnostic form of Trichuris trichiura.

Eggs passed in stool (occasionally adult)

16

Microscopic appearance of eggs in Trichuris trichiura.

Barrel-shaped eggs, with polar plugs at each end, unembryonated.

17

List the common name for nematodes.

Roundworms.