Pathogen - Host interactions
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Access
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Attachment
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Evasion of defense mechanisms
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An Overview of the Body’s
Defenses
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Resistance to most plant and animal pathogens
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Resistance due to physiological processes of
humans that are incompatible with those of the
pathogen (species resistance)
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Correct chemical receptors not present on human cells
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Temperature and pH may be incompatible with those
necessary for the pathogen’s survival
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Number of pathogens for which humans don’t have
innate resistance can cause disease
An Overview of the Body’s
Defenses
Animation: Host Defenses: Overview
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