Staph and Strep Quiz PDF

1. Which one of the following bacteria have coagulase and protein A as virulence factors? a)Staphylococcus. b) Streptococcus. c) Bacillus. d) Clostridium. e) Neisseria. 2. which one of the following can cause damaged skin and subcutaneous tissue with its toxins? a)Streptococcus...

1. Which one of the following bacteria have coagulase and protein A as virulence factors? a)Staphylococcus. b) Streptococcus. c) Bacillus. d) Clostridium. e) Neisseria. 2. which one of the following can cause damaged skin and subcutaneous tissue with its toxins? a)Streptococcus pyogenes. b) Staphylococcus aureus. c) Staphylococcus epidermidis 3. Which one of the following is NOT a virulence factor in Staphylococcus aureus? a)β-lactamases. b)Coagulase. c)Enterotoxins. d)M protein 4. food poisoning, caused by ingestion of preformed enterotoxin, is caused by which one of the following? a)Staphylococcus aureus. b) Staphylococcus epidermidis. c) Enterococcus faecalis. d) Streptococcus pneumoniae. e) Streptococcus pyogenes. 5. Culture of the pus from the lesion is grown on blood agar plates are beta hemolytic and produce a gold pigment catalase-positive Which of the following organisms is MOST likely the cause of this patient’s infection? a)Streptococcus pyogenes. b) Streptococcus pneumoniae. c) Staphylococcus aureus. d) Staphylococcus epidermidis. 6. All the following are characters of S.aureus except:- a)Catalase positive b) Coagulase negative c) Coagulase positive d) B-hemolytic on blood agar e) Ferment mannitol on mannitol salt agar 7. All the following are characters of S.epidermidis except:- a)Catalase positive b) Coagulase negative c) Coagulase positive d) Non B-hemolytic on blood agar e) Not ferment mannitol on mannitol salt agar 8. All of the following diseases are caused by S.aureus except:- a)Toxic shock syndrome b) Gas gangrene c) staphylococcal scalded skin syndrome (SSSS) d) Food poisoning e) Skin infections 9. Scalded skin syndrome(SSSS) is caused by a)S.aureus b) S.epidermidis c) C.tetani d) E.coli 10.All of the following are toxigenic diseases of S.aureus except:- a)Toxic shock syndrome b) staphylococcal scalded skin syndrome (SSSS) c) Food poisoning d) Skin infections 11.A culture of skin lesions from a patient with pyoderma (impetigo) showed numerous colonies surrounded by a zone of beta-haemolysis on a blood agar plate. A Gram-stained smear showed Gram-positive cocci. If the catalase test is negative, what is the MOST likely causative organism that you isolated? a) Streptococcus pyogenes. b) Staphylococcus aureus. c) Staphylococcus epidermidis. d) Streptococcus pneumoniae. e) Enterococcus faecalis 12.The coagulase test is used to differentiate:- a) Staphylococcus epidermidis from Neisseria meningitidis b) Staphylococcus aureus from Staphylococcus epidermidis c) Streptococcus pyogens from Staphylococcus aureus d) Streptococcus pyogens from Enterococcus faecalis 13.Protein A characterized by all except A) used in staph.aureus classification B) Present in cell wall C) Protect staph.aureus from killing D) one virulence factor 14.Protein M in strept pyogenes characterized by all except A) Many type B) Present in cell wall C) its virulence factor D) Classify all streptococci 15.Toxic shock syndrome can be caused by A) Pyrogenic exotoxin A B) Pyrogenic exotoxin B C) Pyrogenic exotoxin A and C D) Pathogenic staph aureus 16.All of the following are toxigenic diseases of S.aureus except:- a) Toxic shock syndrome b) staphylococcal scalded skin syndrome (SSSS) c) Food poisoning d) Skin infections 17.Pyrogenic toxin responsible for necrotizing fasciitis a. Pyrogenic toxin A b. Pyrogenic toxin B c. Pyrogenic toxin c d. None of the above 18.4S is caused by which of the following a. Streptococcus pyogenes b. Staphylococcus aureus c. Clostridium tetani d. Staphylococcus saprophyticus 19.All of the following are characteristics for s.aureus Except a. Mannitol fermenter b. Have hemolysin enzyme c. Non hemolytic d. Coagulase positive 20.Food poisoning by koshari is due to a. s.aureus alone b. Staph aureus and its preformed enterotoxin c. Strept pyogenes d. None of the above 21.The presence of Staphylococcus epidermidis on healthy skin without causing disease This is an example of which one of the following? a. Virulence. b. Pathogenicity. c. flora d. Opportunism