- The infectious microorganisms exists the reservoirs.
- Transmitted by direct contact, vectors (insects) or direct exposure (soil)
- Human to human transmission by aerosolized microorganisms in droplets (sneezing) or physical contact (sexual contact).
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Stage 1:
Colonization
- After deposit microorganism stabilizes adherence to tissue through specific receptor (respiratory tract infections bind to molecules on respiratory epithelium)
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Stage 2:
Invasion
- The infectious agents invade surrounding tissue.
- The developed mechanisms penetrate tissues and avoid host's nonspecific and specifics defences.
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Stage 3:
Multiplication
- Needing a warm, nutrient filled host environment.
- Undergoes rapid multiplication in the environment, replicate within infected cells, macrophages and other cells.
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Stage 4:
Spread
- They produce localized infections without spread but other highly invasive may enter lymphatics, blood or internal organs.
- Successful spread relies on virulence factors (adhesion molecules) fungi are opportunistic.
- After deposit microorganism stabilizes adherence to tissue through specific receptor (respiratory tract infections bind to molecules on respiratory epithelium)
Back
Stage 1:
Colonization
Card 3
Front
- The infectious agents invade surrounding tissue.
- The developed mechanisms penetrate tissues and avoid host's nonspecific and specifics defences.
Back
Card 4
Front
- Needing a warm, nutrient filled host environment.
- Undergoes rapid multiplication in the environment, replicate within infected cells, macrophages and other cells.
Back
Card 5
Front
- They produce localized infections without spread but other highly invasive may enter lymphatics, blood or internal organs.
- Successful spread relies on virulence factors (adhesion molecules) fungi are opportunistic.
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