question
True
answer
Normal microbiota assist in digestion and plays a role in immune system maturation.
question
False
answer
Resident microbiota do not re-establishes itself once there is a disturbance.
question
True
answer
Staphylococcus aureus can be a normal microbiota on the skin in small numbers.
question
False
answer
In the GIT, there are various enterobacteriaceae including Salmonella and Shigella.
question
True
answer
In human genitalia, alpha-hemolytic and non-hemolytic streptococci are found in any quantity
question
False
answer
In the GIT, resident microbiota synthesizes Vitamin K and helps in the absorption of nutrients.
question
True
answer
In the upper respiratory tract (URT), Streptococcus viridans are the most common resident microbiota.
question
True
answer
In the large intestines or colon, the most common resident microbiota are the Bacteroides species
question
True
answer
Beta lactamase makes Staphylococcus aureus resistant to many penicillin.
question
Hyaluronidase
answer
Which of the following substances secreted by Staphylococci that is considered a "spreading factor"?
question
Coagulase
answer
Which of the following substances is a protein that clots plasma and binds with prothrombin and inhibits phagocytosis among Staphylococci?
question
Exfoliative Toxin
answer
Which of the following is the prototype of superantigen?
question
Staph. Saprophyticus
answer
Which of the following Staphylococci is the most common cause of Urinary Tract Infection (UTI) in young women
question
Scalded skin syndrome
answer
The following staphylococcal skin infections are of low invasiveness except:
question
False
answer
Serologic testing makes use of micro-dilution or disk diffusion on staphylococcal isolates from significant infections.
question
True
answer
Streptococcus mitis produces mild infections, thus the name mitis which means mild.
question
True
answer
Streptococcus pneumoniae is a group A alpha hemolytic organism.
question
True
answer
M protein prevents phagocytosis by blocking the activation of complement, thus preventing the neutrophils from going to the site of infection.
question
False
answer
Patients with cutaneous infections do not develop antibodies against streptolysin O because streptolysin is inhibited by cholesterol in skin lipids.
question
False
answer
Rheumatic fever is the most serious sequela of Streptococcus pyogenes because it can result in the production of necrotizing fasciitis.
question
Catalase Positive
answer
The following are true about Streptococci, except:
question
Has group B antigen
answer
The following are true about Streptococcus pyogenes, except:
question
Presence of lipoteichoic acid
answer
The following are mechanisms for avoiding phagocytosis, except:
question
It is associated with toxic shock syndrome
answer
The following are true about streptolysin S, except:
question
Streptodornase
answer
This reduces the viscosity of the abscess material thus, facilitating the spread of infection:
question
Presence of purulent skin lesions
answer
The following are true about scarlet fever, except:
question
Saliva
answer
The following are specimens for culture in patients with streptococcal infections, except:
question
Pharyngitis
answer
Patients having this condition require antibiotic prophylaxis prior to dental procedures:
question
False
answer
The virulent strains of Streptococcus pneumoniae are covered with hyaluronic capsule which prevents the phagocytosis of the organism.
question
Pneumonia
answer
This is the most frequent serious infection caused by Streptococcus pneumoniae:
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