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Samenvatting LMM/ Te kennen MO: protista, parasitaire wormen, virussen $4.86   Add to cart

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Samenvatting LMM/ Te kennen MO: protista, parasitaire wormen, virussen

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Te kennen MO: protista, parasitaire wormen, virussen

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  • January 15, 2022
  • 22
  • 2021/2022
  • Summary
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1. Protista




1

,Protista 1. Giardia lamblia
Hfdst 4: 4.1 Protozoa – Giardia lamblia
Protista Wat?
Een flagellaire darmparasiet. In de darm van de gastheer wordt door de trofozoiet (de vegetatieve vorm) een cyste gevormd, die met
de stoelgang wordt uitgescheiden. Cysten worden gedood door verhitting (besmet water kan gedurende enkele minuten gekookt
worden), chlorering, ozonisatie en uitdroging.
Prevalentie?
Meest frequent voorkomende (potentieel) pathogene darmparasiet bij de mens, wereldwijd.
De nationale incidentie:
 13,7 per 100.000 inwoners.
 meer in Vlaanderen dan Wallonië
 35% van de diagnoses bij kinderen onder 9 jaar
 vnl bij kinderen tss 1-4 jaar
 vnl tegen eind zomer, herfst
Levenscyclus en overdracht (reservoir)?
1. Opname van cysten aanwezig in fecaal verontreinigd drinkwater OF
direct besmet met cysten van een Gardia drager
2. Lage pH maag & spijsverteringsenzymen -> cyste ontwikkeld tot
trofoziet (hangt met zuignap aan de microvilli van darmepitheel)
3. Vermeerdering door binaire deling
4. Na 2 weken kapselen sommigen zich in en worden cysten gevormd




Figuur 1 cyste (non actief) Figuur 2 trofozoiet (actief)

Ziektebeeld?

2

, Geardiasis (lambliasis)
 Infectie van dunne darm
 Gastro-enteritis
 Besmetting via feco-orale route: door besmet water, groenten…
 Symtomen:
 Buikkrampen, vermoeidheid, gewichtsverlies, kwalijk riekende, vettige diarree
 Door beschadiging darmepitheel -> opname VS verstoord -> ondervoeding en bloedarmoede
 Zoönose
Preventieve maatregelen?
1) Algemene hygiëne
2) Sanitaire hygiëne (zeker bij kinderen)




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