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Samenvatting H15 acute virale infectie

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H15 acute virale infectie zelfgeschreven cursus/samenvatting !! best in bundel te kopen

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October 1, 2025
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Written in
2025/2026
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15 Acute virale infectie
Quasi alles is in kader van influenza
Verloop
PAMP + DAMP → acuut ziektebeeld

enkel PAMP → chronisch ziektebeeld
Eigenschappen

hit-and-run → herstel of dood

typisch naakte virussen (doden sws gastheercel) bv hepatitis A

virussen met membraan: inluenza A (dr massieve repl doden ze ook), coronavirus
Influenza A

Droplet infectie

8 RNA segmenten (//B) → transcriptie en replicatie in kern

M1: matrix eiwit

M2: kanaal eiwit (vroeger medicatie op)
NA: (ook influenza B)

katalyseert de klieving & verhindert zelfaggregatie dochtervirussen

verwijdert siaalzuur (HA, gastheercel,…)
transport facilitatie drheen mucine

PB1,PB2,PA: RNA-afh polymerasen

NP: nucleoproteïne

NS: non-structural protein (onderdrukt IM respons)
HA: hemagluttinine (x siaal-zuurbevattende R → agglutatie rode bloedcellen, fusie met celmembraan,
binding aan levende cel)
bij endocytose onstapt het hiermee het lysosoom (getriggert dr lage pH)

→ hiertegen neutralizerende Ab, dus epidemiën hier veranderingen meestal

in epitheelcellen, monocyten, macrofagen en andere witte bloedcellen

respons op infectie
aangeboren:


PAMP (x sensed by TLR3) → IFN + beshcerming naburige cellen + NK activatie
+ NF-κB

= anti-virale en pro-IF respons


lokale macrofagen blijven ter plaatse vr immuun respons en wondherstel

IFN:
typisch inductie interferon type 1 dr dsDNA
→ tegenzet :

blokkeren inductie, virale decoy IFN R, IC signalisatie verstoring, !blokkeren ISG




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