20 Questions
What is the classification of Staphylococci based on?
Production of coagulase enzyme
Which of the following is true about Staphylococci?
They withstand 50 °C for 30 minutes
Which species of Staphylococci is coagulase positive?
Staphylococcus aureus
What is the shape and arrangement of Staphylococci cells?
Spherical cells arranged in clusters
What type of hemolysis does Staphylococci show on blood agar?
β- hemolysis
True or false: Staphylococci are motile bacteria?
False
True or false: Staphylococci can form spores?
False
True or false: Staphylococci are inhibited by 3% hexachlorophene?
True
True or false: Staphylococcus epidermidis is a coagulase negative Staphylococci?
True
True or false: Staphylococci show beta-hemolysis on blood agar?
True
True or false: Staphylococci are resistant to heat and drying?
True
True or false: Staphylococcus aureus is a coagulase negative Staphylococci?
False
True or false: Staphylococci grow on nutrient agar producing colonies that range in color from gray to deep yellow?
True
True or false: Staphylococci are facultative anaerobes?
True
True or false: Staphylococci are classified based on their ability to produce coagulase enzyme?
True
What is the function of the peptidoglycan layer in S. aureus?
Endogenous pyrogen & have endotoxin-like activity
Which toxin is associated with scalded skin syndrome in S. aureus?
Exfoliatin toxin
What is the function of teichoic acid in S. aureus?
Mediates adherence
Which toxin of S. aureus is most potent in damaging membranes?
Alpha toxin
What is the function of Protein A & Capsular Polysaccharide in S. aureus?
Antiphagocytosis
Test your knowledge on Staphylococci, a group of non-motile Gram positive bacteria that are arranged in clusters resembling a bunch of grapes. Learn about their resistance to drying, heat, and sodium chloride, as well as their vulnerability to certain chemicals. Discover the major human pathogen and skin commensals associated with Staphylococci and their growth characteristics on various media.
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