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PARASIT > Trematodes > Flashcards

Trematodes Flashcards

1
Q

Most important digenetic trematode of man

A

TREMATODES DIOECIOUS

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2
Q

Delicate cylindroidal parasites

A

TREMATODES DIOECIOUS

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3
Q

Live typically in pairs in portal blood vessels or in the vessical
venules

A

TREMATODES DIOECIOUS

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4
Q

Larger compared to the female

A

TREMATODES DIOECIOUS male

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5
Q

Gynecophoral canal on the ventral side

A

TREMATODES DIOECIOUS male

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6
Q

Smaller and are thread like

A

TREMATODES DIOECIOUS female

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7
Q

Mot of trematodes

A

Skin penetration of cercariae

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8
Q

first human infection of trematodes

A

bilharziasis
Teodor bilharz 1951

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9
Q

are commonly isolated from
the feces. Although occasionally they can also obtain in the
urine

A

The S. mansoni and S. japonicum

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10
Q

is primarily isolated in the urine

A

Schistosoma haematobium

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11
Q

Egg will hatch releasing the

A

miracidia

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12
Q

will be the one to penetrate the tissue.

A

miracidia

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13
Q

will be developed in the snail

A

sporocyts

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14
Q

stage will be released by the snail to the water and
free swimming, this will penetrate the skin

A

cercariae

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15
Q

In side the man, Cercariae will lose it tails during the
penetration which will become ____ before going
to the circulation

A

schistosomulae

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16
Q

3 stages of infection:
● Skin penetration to arrival of adults in venules
● Pathologic changes:
❖ Negligible to mild cutaneous lesions
❖ Tissue reactions to the immature worms
❖ Associated toxic and allergic reactions

A
  1. PRE-PATENT OR DEVELOPMENTAL
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17
Q

3 stages of infection:
● Active egg deposition and extrusion
● Appearance of eggs in the stool
● Symptoms:
❖ Daily fever
❖ Epigastric pain
❖ Continuous increase in the size of the liver
❖ Loss of weight
❖ Relapse of pain

A
  1. ACUTE STAGE
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18
Q

3 STAGES OF INFECTION :
● Invasion of the tissues by the migrating larva and adult worms:
❖ Petechial hemorrhage
❖ Small foci of eosinophilia
❖ Neutrophilic infiltration in the lungs
❖ Cough and hemoptysis
❖ Acute inflammation reactions in the liver with fever
● Stable egg output and tissue proliferation

A
  1. CHRONIC STAGE
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19
Q

LABORATORY DIAGNOSIS:
● Eggs in urine (dysuria and hematuria: presence of blood in
urine)
● Bladder biopsy

A
  1. SCHISTOSOMA HAEMATOBIUM
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20
Q

Specimen of choice for recovery of haematobium:

A

presence
of eggs in a concentrated urine specimen or bladder biopsy

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21
Q

LABORATORY DIAGNOSIS:
Accomplished by recovery of eggs in the stool or through
rectal biopsy

A

S. JAPONICUM AND S. MANSONI

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22
Q

Schis.j common name?

A

Oriental blood fluke or visceral blood fluke

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23
Q

Utilize glucose at a fairly fast rate

A

SCHISTOSOMA JAPONICUM

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24
Q

life span of schis.j

A

3-8 years

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25
Q

is the smallest
of the Schistosoma spp measuring 50-85 um x 38-60 um

A

SCHISTOSOMA JAPONICUM

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26
Q

Egg is characterized by the presence of small lateral spine
which is often difficult to detect on microscopic examination

A

SCHISTOSOMA JAPONICUM

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27
Q

Ovoidal testes: single row behind acetabulum

A

schis.j male

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28
Q

Union of ceca and testes of schis. j male

A

posterior to the middle half of the body

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29
Q

schis.j male has what kind of canal?

A

gynecophoral canal

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30
Q

schis.j has what shape of ovary?

A

pyramidal ovary at the center of the body

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31
Q

Adherent to bits of tissues or RBCs

A

schis.j ova

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32
Q

Non-operculated ova of?

A

schis.j

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33
Q

schis. j ova looks like what?

A

Minute lateral knob/ curved hook

34
Q

can only hatch in clean water with sufficient oxygen

A

S.japonicum

35
Q

: Infective to snails for 8-12 hours

A

MIRACIDIUM of schis Japo

36
Q

is attracted from the secretions of the snails

A

MIRACIDIUM of S.japonicum

37
Q

Phototactic and swims actively

A

MIRACIDIUM of S.japo

38
Q

schis j:
Forked tail

39
Q

schis j:
Oral sucker (anterior end) and small ventral sucker

40
Q

schis j:Cercarial penetration is mediated by

A

lytic enzymes

41
Q

schis j: The stimulus for the penetration of CERCARIA is the presence of

A

lipid in skin

42
Q

schis j:The drugs ___ and ___ would help repel
cercariae in the skin

A

dimethlyate and niclosamide

43
Q

schis j INFECTIVE STAGE:

44
Q

schis j: intermeditate host

A

Snails:
➢ Oncomelania hupensis
➢ Oncomelania oncophora
➢ Oncomelania formosona

45
Q

schis j final host

A

Man, dogs, cats, carabao, cows, rodents, monkeys

46
Q

schis j reservoir host

A

Wild and domestic animals (sheep, dogs, mice, horses, pigs)

47
Q

schis j disease

A

➢ Visceral or Oriental Schistosomiasis
➢ Katayama’s Disease

48
Q

common name of schis.m

A

Manson’s Blood Fluke

49
Q

the organism is somewhat oblong and
possesses a prominent large lateral spine

A

SCHISTOSOMA MANSONI

50
Q

schis.m male union of ceca

A

middle half of the body

51
Q

Smallest schistosome

A

schis mansoni female

52
Q

schis m. ovary

A

anterior to the middle half of the body

53
Q

schis mansoni contains how many ova

54
Q

true or false: FEMALE SCHISTOSOMA MANSONI IS LONGER AND
SLENDER THAN THE MALE

55
Q

OVA:
 Ellipsoidal

56
Q

ova: yellowish brown in color

57
Q

distinguishable characteristic of schis mansoni ova?

A

Prominent lateral spine

58
Q

schis m ova Appear in the feces ____ days after infection

A

30-40 days

60
Q

CERCARIA OF SCHISTOSOMA japo is what?

A

forked tail

61
Q

intermediate host of schis mansoni?

A

SNAILS
 Biomphalaria (Philippines)
 Tropicorbis (S. America)
 Australorbis (S. America)

62
Q

definitive host of schis mansoni

63
Q

reservoir host of schis mansoni

64
Q

disease of schis mansoni

A

Intestinal Bilharziasis
Schistosomal Dysentry

65
Q

infective stage of schis mansoni

66
Q

schistosoma hematobium common name?

A

Vessical blood fluke, Bladder fluk

67
Q

Resembles S. mansoni in size and shape

A

. SCHISTOSOMA HEMATOBIUM

68
Q

. SCHISTOSOMA HEMATOBIUM DISTRIBUTION:

A

● Africa
● Western Asia
● Southern Europe

69
Q

schis haema male union with the ceca

A

posterior to middle half of the body

70
Q

schis hema male how many testes

71
Q

schistosoma haematobium female, ovary is located at

A

posterior to middle part of the body

72
Q

distinguishable characteristic of schis hema ova

A

Ellipsoidal with prominent terminal spine

73
Q

schis hema ova color

A

yellowish brown color

74
Q

schis hema intermediate host

A

SNAILS
○ Biomphalaria - Africa
○ Bulimus - Middle east

75
Q

disease of S,hema

A

Vessical schistosomiasis
urinary schistosomiasis
schistosomia hematuria

76
Q

ventral groovve where the female resides during sexual activity

A

Gynecophoral canal

77
Q

paired adult worm will migrate to the?

A

mesenteric venules of rectum or the bowel

78
Q

from the circulation, schistosoma spp will migrate to the ____ and become a mature adult worm

A

Portal blood in liver

78
Q

Schistosoma spp can also be lodge to the?

A

venous plexus of bladder

PARASIT (29 decks)

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