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PARASITOLOGY LEC > INTESTINAL NEMATODES: ASCARIS AND TRICHURIS > Flashcards

INTESTINAL NEMATODES: ASCARIS AND TRICHURIS Flashcards

1
Q

flat and segmented

A

Phylum cestoda (tapeworms)

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2
Q

Flat and unsegmented

A

Phylum trematoda (flukes)

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3
Q

free living or obligate parasites

A

Nematodes

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4
Q

Most organs of parasitic worms are greatly reduced but reproductive system is well developed

A

Nematodes

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5
Q
  • Nematodes have complete digestive tract and have separate sexes (male and female) and
A

dioecious

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6
Q
  • Trematodes and Cestodes are ____________
A

hermaphrodites or monoecious

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7
Q

Elongated, unsegmented and cylindrical bodies
* Bilaterally symmetrical
* Tapered posterior end and rounded anterior end
ORE Pugh

A

Nematodes

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8
Q

in nematodes _____ are generally smaller than female

A

male

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9
Q

General features
* Both sexes are rounded anterior end and tapering or blunted end
* Males are curved posteriorly while females have flat posteriorly
sperm duct

A

Nematodes (Roundworms)

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10
Q

Longitudinal muscles: probing and penetrating motion

A

The nematodes (roundworms)

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11
Q

An arrangement of multiple longitudinal rows of muscle cells in each quadrant is termed __________

A

Polymyarian

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12
Q

one with no more than2 rows of cells is called _________

A

Holomyarian

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13
Q

one with 2 to 5 rows is meromyarian

A

Meromyarian

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14
Q

fluid filled space within the bodies of roundworm (not covered by the membrane)

A

Pseudocelom

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15
Q

Fluid-filled body cavity lying inside the external body wall of the nematode that bathes the internal organs, including the alimentary system and the reproductive system

A

Pseudocoelom

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16
Q

helps with waste removal, circulation, better digestion, and shock absorption for the internal organs
pseudocoelom

A

Pseudocoelom

17
Q

In pseudocoelom the circulatory and respiratory are ______________

A

absent

18
Q

Nervous System

  • The nematode nervous system is characterized by an
    (1) Circumoral brain or __________ around the ________ and;
    Cuticle
    Dorsal nerve
    Nerve ganglion
    Testis
    (2) four peripheral nerves/cords are found to run along the body
    _____________
A
  • 1 Ventral nerve or cord
  • 1 Dorsal nerve or cord
  • 2 lateral nerves or cords
19
Q

Muscles branch to ____________, rather than nerves to muscles.

A

dorsal to ventral nerve cords

20
Q

__________ cuticular depressions present on the lips surrounding the mouth in the nematodes

A

Amphids

21
Q

________ - similar to amphids but are found at the tail

A

Phasmids

22
Q

What are the 3 stages

A

Adult
ova
larva

AOL

23
Q

Habitats in Human
define CHATS (small intestine)
and TAE (Large intestine)

A

CHATS
C - Capillaria Philippinensis
H - Hookworm
A - Ascaris Lumbricoides
T - Trichinella Spiralis
S - Strongyloides Stercoralis

Trichuris TrichiurA
Enterobius Vermicularis

24
Q

Give me the 7 worm of ascaris lumbricoides

A

Giant intestinal roundworm
Pinkworm
pinworm
threadworm
whipworm
sitworm
pudoc worm

25
Q

AHW

Ascaris
Hookworm
Whipworm

A

Polymyarian
meromyarian
Holomyarian

26
Q

Important things to take note

  • A female adult worm can lay ________eggs per day
    ____________ of ova in soil lasts for __________ and can survive in the soil for ___________
  • The hepato-tracheal migration phase of the parasite is about ______
    Development into egg-laying adults take _________after ingestion
    Lifespan of adult worm: _________
A

200, 000
Embryonation - 3weeks - 2 years
14 days
9-11 weeks
1 year

27
Q

Fertile eggs measure ____________
* Has outer coarsely mammilated albuminous covering which may be lost in some eggs

A

Ascaris lumbricoides
45-70 um by 35-50um

28
Q

The_____________ are creamy-white to pinkish yellow when freshly expelled. The head is provided with 3 lips and a small triangular buccal cavity

A

The adult worm in ascaris lumbricoides

29
Q

____________ is tapered at both ends and large (20 to 35 cm long, up to 45cm)

A

Female worm in ascaris lumbricoides

30
Q

___________smaller and slender, curve posteriorly and equip with copulatory spicule
ATLA

A

Male

31
Q

a disease in which eosinophils accumulate in the lung in response to a parasitic infection
Mimicking pneumonia and asthma

A

Loeffler’s syndrome

32
Q

give me the three diagnostic and treatment

A

Albendazole 400 mg 1 dose
Mebendazole 500 mg 1 dose
Pyrantel pamoate 10 mg/kg 1 dose

33
Q

Give me the 3 prevention

A

EHR
Environmental Sanitation
Hygiene Education
Regular deworming

34
Q

_____________ has no lung migration in its life cycle
* As soon as the embryonated ovum is ingested, the larvae will eventually mature into adults

A

Trichuris trichiura

35
Q

。 Flesh colored or pinkish slender worm
Anterior ______ of the worm is attenuated and thin in contrast to the remaining posterior ______ which is fleshy and robust
“Whip like appearance”
Whip like apperance

A

Trichuris trichiura
2/3
1/3

36
Q

Trichuris trichiura common name

A

whipworm

37
Q

trichuris trichiura abundant in ______

A

TT47 protein

PARASITOLOGY LEC (11 decks)

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