What is a Microorganism?
What is a pathogen?
What is an infection?
1-Any organism too small to be seen by the naked eye
2-Microorganisms that cause disease
3-The presence of microorganisms causing damage to body tissues
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What would happen if the physical protective is compromised ?
Cuts in the skin allow normally non-infectious bacteria cause local infections/invade further/infect organs and Damage to intestinal tract releases intestinal bacteria into
the blood stream which can lead to sepsis/ shock/ death
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What would happen if the inflammatory/immune systems were compromised?
If these systems compromised many microorganisms will leave their normal site & cause infection elsewhere in the body and individuals with an immune deficiency can easily become infected – opportunistic microorganisms - seize the opportunity when defensiv
Infectious microorganism exist in resivoirs,transmitted by direct contact or indirectly by vectors.Human-to-human transmission by aerosolized microorganisms in droplets or physical contact. After deposit in a receptive environment the microorganism stabli
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Explain Invasion?
Infectious agent can invade surronding tissues/other sites and Developed mechanisms to penetrate tissues & avoid host’s nonspecific and specific defences (inflammation & immunity)
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Explain Multiplication?
Warm nutrient filled environment and the microorganism undergoes rapid multiplication, they replicate within infected cells, macrpphages and other cells
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Explain Spread?
If localised infection then stay within region. If highly invasive it can enter lymphatics, blood or internal organs.
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Four stages of clinical infectious diseases process?
1. Incubation period
2. Prodromal stage
3. Invasion period
4. Convalescence
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Explain the incubation period?
The interval between exposure to an infectious agent and the appearance of the first symptoms
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Explain the Prodomal stage?
The appearance of initial symptoms which are often mild including feeling of discomfort and tiredness
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Explain the invasion period?
The pathogen is multiplying rapidly, invading further, affecting tissues at site of initial colonization & other areas
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Explain the covalence period?
Individual’s immune & inflammatory systems have in general successfully removed infectious agent
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What is pyrexia?
Known as a fever, its a rise in the body temperature
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What is a pyrogen?
A circulating protein agent that can produce a fever, resets the thermostat in the hypothalamus and cause raise in the temperature
What would happen if the physical protective is compromised ?
Back
Cuts in the skin allow normally non-infectious bacteria cause local infections/invade further/infect organs and Damage to intestinal tract releases intestinal bacteria into
the blood stream which can lead to sepsis/ shock/ death
Card 3
Front
What would happen if the inflammatory/immune systems were compromised?
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