MICROBIOLOGY CHAPTER 15 EXAM | QUESTIONS & 100% VERIFIED ANSWERS | LATEST UPDATE | GRADED A+

Which of the following statements about M protein is FALSE? A) It is a protein. B) It is heat- and acid-resistant. C) It is readily digested by phagocytes. D) It is found on Streptococcus pyogenes. E) It is found on fimbriae. Correct Answer: C) It is readily digested by phagocytes. The most frequently used portal of entry for pathogens is the A) skin. B) parenteral route. C) mucous membranes of the respiratory tract. D) mucous membranes of the gastrointestinal tract. E) All of these portals are used equally. Correct Answer: C) mucous membranes of the respiratory tract. 2 Bacteria that cause periodontal disease have adhesins for receptors on streptococci that colonize on teeth. This indicates that A) streptococcal colonization is necessary for periodontal disease. B) streptococci get bacterial infections. C) streptococci cause periodontal disease. D) bacteria that cause periodontal disease adhere to gums and teeth. E) bacteria that cause periodontal disease adhere to teeth. Correct Answer: A) streptococcal colonization is necessary for periodontal disease. Which of the following statements about staphylococcal enterotoxin is FALSE? A) It is a superantigen. B) It is produced by Staphylococcus aureus growing in the host's intestines. C) It is an exotoxin. D) It causes diarrhea. E) It causes vomiting. Correct Answer: B) It is produced by Staphylococcus aureus growing in the host's intestines.