NEMATODA Flashcards

(80 cards)

1
Q

Majority of nematodes are free-living, they can survive in their own

A

True

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2
Q

Most prevalent area where you can see nematodes

A

Soil

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3
Q

Nematodes are tapered where

A

Both ends (complete GI tract)

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4
Q

Nematodes are sexually ___

A

Dimorphic

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5
Q

Nematodes have cuticles, while flatworms do not

A

True

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6
Q

Cuticles undergoes molding as nematodes develop from adult to larva

A

False; larva to adult

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7
Q

3 most common nematodes in Tissue and Blood

A

Trichuris trichuria, Wuchereria bancrofti. Brugia malayi

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8
Q

Most common intestinal roundworm infecting man and the largest nematode

A

Ascaris Lumbricoides

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9
Q

Common name of Ascaris Lumbricoides

A

Giant Roundworm

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10
Q

Ascaris Lumbricoides has intermediate host

A

False; definitive (ONLY HUMANS)

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11
Q

Ascaris Lumbricoides; jejenum, ileum

A

>

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12
Q

Plays a huge role in prevention of Ascaris Lumbricoides

A

Sanitation

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13
Q

Human Feces as Fertilizer

A

Ascaris Lumbricoides

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14
Q

Cuticle with fine circular striations

A

Ascaris Lumbricoides

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15
Q

Size of Ascaris Lumbricoides: Males, Females

A

Males < Females

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16
Q

Matching type: Male or Female
Incurved Tail
Pointed Tail (Tapered)

A

Incurved Tail - Male
Pointed Tail (Tapered) - female

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17
Q

Fertilized - Inseminated

A

True

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18
Q

all nematodes are parasitic

A

true

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19
Q

for nematodes, man is the only host

A

true

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20
Q

cuticle of ascaris lumbricoides

A

fine circular striations

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21
Q

diagnostic stage of ascaris

A

ova

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22
Q

3 layers of ascaris fertilized eggs

A

inner non-permeable lipoidal vitelline membrane
middle transparent thick glycogen membrane outer coarsely mammillated albuminoid membrane

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23
Q

fertilized egg without the mammillated coat

A

decorticated fertilized egg

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24
Q

in fertilized egg, how many cells

A

single

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25
unfertilized egg is smaller than fertilized ones for ascaris
false
26
unfertilized egg for ascaris is thicker shell
false
27
contains varisized highly refractile granules
unfertilized eggs of ascaris
28
infective stage of ascaris
embryonated egg
29
unfertilized egg do not have the firs two layers for ascaris
true
30
female ascaris produce how much egg per day
200,000
31
adult ascaris are very migratory
true
32
unfertilized egg may be ingested but not infected; fertile eggs can embryonate after 16 days
true; false (18 days)
33
for ascaris, how long do clinical manifestations show
4 days to 2 weeks
34
clinical manifestation for migratory larvae of ascaris in children infected for the first time
respiratory asthma, cough with rales, chest pain
35
clinical manifestation for migratory larvae of ascaris in hypersensitive individuals
LOEFFLER'S SYNDROME (allergic eosinophilic infiltration of the lungs)
36
what stimulates adult ascaris to go upward
fever and vomiting - fever - due to high eosinophilic infiltration
37
5 GI manifestations of Ascaris
Intestinal obstruction, Biliary ascariasis, appendicitis, acute pancreatitis, peritonitis
38
Adults worms of ascaris manifestation
low fat and nitrogen absorption, high stool nitrogen
39
3 diagnostic methods of ascaris
formalin ether concentration technique, direct fecalysis, kato-katz
40
drugs of treatment for ascaris
albendazole (400 mg once) mebendazole (500 mg once) ivermectin (150-200 mcg once)
41
these species suck blood voraciously and damage the musoca
hookworms
42
old world hookworms
ancylostoma duodenale
42
new world hookworms
necator americanus
43
how many cell stages for hookworm
4-8 cell stages
44
3 characteristics of hookworms
ovoidal, thin-shelled, colorless
45
diagnostic stage of hookworms
ova
46
what hookworm larva infects humans
filariform larva
47
hookworm hatches 1-2 days, releases what larva
rhabditiform
48
what hookworm requires the transpulmonary migration phase
Necator americanus
49
Ancylostoma duodenale can also do these two routes, aside from transpulmonary
oral transmammary route
50
creeping eruptions or cutaneous larva migrans
hookworm larva
51
anemia hypoalbuminemia, increase appetite with pica are clinical manifestations of what stage in hookworms, children suffering from mental, physical, and sexual retardation
adult worm
52
diagnostic technique unique to hookworms
harada-mori technique
53
whipworm
trichuris trichiura
54
prevalent in areas of high rainfall, high humidity, and high shade
trichuris trichiura
55
difference between t. tirchiura and the other two most infective nematodes
t. trichuria- attaches to cecum (more on the LI)
56
diagnostic stage of trichuris
unembryonated eggs
57
trichuris pass unembryonated in stool
true - becomes embryonated for 10-14 days in soil
57
trichuris have triple shell
true
58
infective stage of trichuris
embryonated egg
59
light infection of trichuris is usually asymptomatic
true
60
clincial manifestations of heavy infection of trichuris trichiura
rectal prolapse, diffuse colitis, appendicitis, malnutrition, hyperchromic anemia, mental retardation
61
eggs of enterobius vermicularis contains how many layers in egg
2 layers - inner embryonic lipoidal and outer thick hyaline albuminous shell
62
presentation of nocturnal itch in the perianal area
enterobius vermicularis
63
three clinical manifestations of enterobius vermicularis
egg laying (intense pruritus or ithcing in the perianal region), adult worm attachment (minute ulcerations and abscesses formation), and migration (vulvovaginitis and salpingitis)
64
diagnosis for enterobius vermicularis
scotch tape swab
65
threadworm
strongyloides stercoralis
66
larva seen on stool examination of freshly passed specimen
strongyloides stercoralis
67
infective stage of trichuris trichiura
embryonated eggs
68
enterobius vermicularis adult morphology
spindle-shaped with a sharp tail
69
enterobius vermicularis anterior end
lateral wing or cephalic alae
70
enterobius vermicularis stage
egg/ova
71
shortest adult worm development
enterobius vermicularis
72
enterobius vermicularis diagnostic stage
ova
73
enterobius vermicularis infective stage
embryonated egg
74
common name of strongyloides stercoralis
threadworms
75
only one capable of perpetuation in man by producing infective larvae
strongyloides stercoralis
76
they only have larva form in the adult form
strongyloides stercoralis
77
s. stercoralis distinguishing tail feature of filariform
notched tail
78