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3-3 Blood Nematodes Flashcards

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1
Q

causes lymphatic filariasis

A

w. bancrofti

b malayi

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2
Q

onchocerciasis

A

o. volvulus

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3
Q

restricted to some islands of indonesia

A

b timori

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4
Q

larvae migrate to site and there they produce____

A

micrfilariae

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5
Q

resides in nodules in subcutaneous tissues

A

o. volvulus

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6
Q

resides in body cavities

A

m/ perstans

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7
Q

resides in subcutaneous tissues

A

loa loa, ozzardi

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8
Q

female worms produce microfilariae and circulate in the blood except for??

A

VS– volvulus and streptocerca – skin

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9
Q

arthropod for:

  1. volvulus
  2. malayi and bancrofti
  3. ozzardi
  4. loa loa
A
  1. black flies (simulium)
  2. mosquitoes
  3. midges and blackflies
  4. deerflies (chrysops)
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10
Q

slow maturation

A

onchocerca

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11
Q

adult bancrofti produces microfilariae that are?

A
  • sheated

- nocturnal periodicity

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12
Q

infective stage of all?

A

L3 filarial larvae

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13
Q

diagnostic stage?

A

microfilariae

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14
Q

(brugia malayi)humans exhibit microfilarialemia w highest numbers at 12nn-8pm

A

subperiodic

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15
Q

vector of brugia malayi

A

aedes

mansonia

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16
Q

diseases caused by malayi and bancrofti

A

acute fever

  • lymphatic inflammation
  • TPE
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17
Q

malayi vs bancrofti:
adults are filiform?
adults have hyaline sheath longer than itself?
secondary kinks and nuclei at tip of tail?

A

bancrofti
bancrofti
malayi

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18
Q

malayi vectors:

  • breeds in rice fields?
  • ” in swamps
A

M. uniformis

M. bonnae

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19
Q

important reservior of malayi

A

cat

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20
Q

with W. bancrofti, there is?

A

scrootal elephantiasis

hydrocele

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21
Q

t or f? manifestationc cannot be caused by degenerating worm?

A

false. can be:living or dead

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22
Q

hyperresponsiveness to maturing worms; in an endemic area; rashes and hives are present

A

Expatriate syndrome

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23
Q

t or f? decreased ESR is included in Sx of TPE

Study These Flashcards
A

false; elevated all (hyper, high)

24
Q

hidden lymphatic pathology and kidney damage

25
immunologic phenomenon caused by sensitization to products of the worms, called?
ADL/DLA
26
``` seen at what stage? ADL/DLA elephantiasis TPE chyluria ```
acute chronic chronic chronic
27
rupture of lymphatics in the kidney
Chyluria
28
nuclei of this worm is regularly space
bancrofti (think of BANK)
29
Dx: centrifugation of blood sample in 2% lysed solution
knott's method (nuts?!)
30
what is DEC provocative test?
microfilaria out of tissues, so collection can be done at night time
31
t or F? antigen detection test dx can distinguish past and present infection.
false.
32
DX which may demostrate obstruction of lymphatics
UTZ
33
DOC for bancrofti and malayi
DEC
34
LOA LOA: is also known as?
african eye worm
35
LOA LOA: priodicity?
diurnal
36
since loa loa is diurnal the specimens from which it can be obtained are?
sputum spinal fluid urine
37
noncirculation phase LOA LOA is found in?
lungs
38
adult or microfilariae: | migrate to SQ deeper tissues?
adult
39
patches of SQ edema called?
calabar swellings
40
t or f? loasis is often asymptomatic
TRUE
41
mansonella ozzardi vectors
cullicoides | simulium
42
describe microfilariae of m. ozzardi
unsheated, non periodic, shorter tail and less tapered than onchocerca, do not extend to tail (nuclei)
43
mansonellosis with skin pigmentations
m. streptocerca
44
special morph feature of m. streptocerca
shepherd's crook
45
onchocerciasis is aka
river blindness
46
onchocerca special diagnosis (together with streptocerca)
skin snips - corneal scleral punch
47
unsheated, tail blunt
perstans
48
mansonella that has nuclei that do not extend
ozzardi
49
t or f: eggs are not diagnostic for toxocara
true
50
2 main clinical presentations
visceral | ocular
51
humans become infected by toxocara thru?
ingestion of eggs, and paratenic hosts
52
only indication of infection in toxocara
serology | eosinophilia
53
OLM vs. VLM? occurs in young adults - w rashes, hepatomeggaly and hyper eosino - difficult to treat
OLM VLM OLM
54
presence of these eggs, higher probabiity that toxocara is present
ascaris | trichuris
55
only means of confirmation
antigen test (EIA)

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