. All of the following are beneficial functions of human normal microbial flora

Question

. All of the following are beneficial functions of human normal microbial flora EXCEPT A. They secrete antibiotics that help combat infectious pathogens B. They occupy host habitats that might otherwise be available to pathogens C. The D. They can provide some vitamins and trace nutrients y may transfer antibiotic resistance genes to pathogenic taxa. 2. Which of the following is the correct sequence of steps for a pathogen to cause disease include: A. attachment, exposure, colonization& growth, in vasion B. exposure, colonization&growth;, attachment, invasion C. invasion, exposure, attachment, colonization & growth D. exposure, attachment, invasion, colonization& growth Which of the following is NOT a virulence factor expressed by pathogenic bacteria? A. fimbriae for attachment and colonization B. exotoxin production C. ability to sporulate D. proteins to inhibit phagocyte killing

Explanation / Answer

1c. the may transfer antibiotic resistance genes to pathogenic taxa.

2.D) exposure, attachment, invasion, colonization and growth.

3. D) proteins to inhibit phagocyte killing.

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