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HEALTH MICROBIOLOGY

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BIO 431

HEALTH MICROBIOLOGY

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Function and importance of normal microflora

• The relationship between the skin and the mucous membrane covering the mouth, digestive, secretory and reproductive systems microorganism

• Normal microbial flora members are useful - sometimes necessary, while the other group is Pathogens.

(3)

Function and importance of normal microflora

• Pathogens use specialized retention and growth factors, auxiliary enzymes and strong toxins to access food sources.

• Pathogens, Host, Parasite, Pathogenicity

• Infection: Virulence ↔ Host resistance, Opportunist (opportunistic) pathogen

• Virulence: Quantitative measure of pathogenicity

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Function and importance of normal microflora

• Infection: Virulence ↔ Host resistance, Opportunist (opportunistic) pathogen

• Virulence: Quantitative measure of pathogenicity

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Function and importance of normal microflora

• Age, stress, diet, general health, lifestyle, pre- existing or simultaneous diseases and genetic hardware can suppress the host's resistance to infections.

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Function and importance of normal microflora

• Nonspecific physical, anatomical and chemical barriers protect the host from being colonized by pathogens. The absence of these defenses results in susceptibility to infection and colonization by the pathogen.

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