5.1 commensal/ normal flora

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6 Terms

1
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normal flora

live inside us withut causing deases

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skin

Staphylococcus epidermidis blocks pathogen attachment.

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gut

Bacteroides fragilis, Escherichia coli produce vitamins B & K.

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vagina

Lactobacillus spp. keep the pH acidic (< 4.5) and outcompete yeasts.

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disruption of this balance (antibiotics, chemotherapy, trauma)

can lead to dysbiosis, an imbalance in the composition and function fo the microbial communities, microbiota within the body particuolarly in the gut

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dysbiosis allows opportunistic overgrowth

Clostridioides difficile infection after broad‑spectrum antibiotics).