67 Questions
Which type of bacteria are considered 'ubiquitous' in nature and can be found in various body sites of humans and animals?
Gram positive cocci
What type of staining is used to identify Gram positive cocci?
Gram staining
Which type of agar is commonly used for the isolation of Gram positive cocci?
Blood agar
Which of the following is a characteristic of Staphylococcus aureus?
GPC grapelike clusters
Which of the following infections can be caused by Staphylococcus aureus?
Pneumonia
Which of the following is a characteristic of Staphylococcus epidermidis?
Commensal on human skin
Which of the following is a predisposing factor for opportunistic Staphylococcus infections?
Presence of foreign bodies, sutures, IV's
Which of the following is a characteristic of Staphylococcus aureus?
Breaks down red blood cells completely
Which of the following infections is caused by Staphylococcus aureus?
Pneumonia
Which of the following is a characteristic of Staphylococcus epidermidis?
Forms biofilms on medical implants
Which of the following is a predisposing factor for opportunistic Staphylococcus infections?
All of the above
Which of the following is a disease caused by Staphylococcus aureus?
All of the above
Which of the following is a characteristic of Staphylococcus saprophyticus?
Causes urinary tract infections in young women
Which of the following is a characteristic of Staphylococcus lugdunensis?
Forms grapelike clusters
Which of the following is a characteristic of Staphylococcus epidermidis?
Forms biofilms on medical implants
Which of the following is a characteristic of Staphylococcus saprophyticus?
Causes urinary tract infections in young women
Which of the following is a characteristic of Staphylococcus lugdunensis?
Forms grapelike clusters
Which of the following is a characteristic of Gram positive cocci?
They have a thick Gram positive cell wall
Which type of agar is commonly used for the isolation of Gram positive cocci?
Columbia sheep blood agar
Which of the following is true about the atmospheric requirements of Gram positive cocci?
They are facultative anaerobes
Which group of antibiotics is effective against Gram positive cocci?
Beta lactam antibiotics
What is the main function of techoic acids in Gram positive cocci?
Contribute to the Gram positive cell wall
Which of the following is NOT a media commonly used for the isolation of Gram positive cocci?
MacConkey agar
What is the role of beta lactam antibiotics in inhibiting the growth of Gram positive cocci?
They interfere with cell wall synthesis
Which of the following is a characteristic of Gram positive cocci stains?
They do not retain crystal violet and stain lighter shades of blue purple to pink
Which of the following is NOT true about Gram positive cocci?
They are resistant to beta lactam antibiotics
What is the significance of Gram positive cocci being considered 'ubiquitous'?
They are found all over the place
Which of the following is a characteristic of Gram positive cocci?
They are commonly found in the environment
What is the primary staining method used to identify Gram positive cocci?
Crystal violet
Which of the following media is commonly used for the isolation of Gram positive cocci?
Columbia sheep blood agar
What is the role of techoic acids in Gram positive cocci?
They contribute to the Gram positive cell wall structure
Which group of antibiotics is effective against Gram positive cocci?
Beta lactam antibiotics
What is the atmospheric requirement for the growth of Gram positive cocci?
Facultative anaerobe
Which of the following is a characteristic of Staphylococcus aureus?
It is a common cause of skin and soft tissue infections
Which of the following is a predisposing factor for opportunistic Staphylococcus infections?
Immunocompromised state
What is the main function of beta lactam antibiotics in inhibiting the growth of Gram positive cocci?
Interfering with cell wall synthesis
Which of the following infections can be caused by Staphylococcus aureus?
Skin and soft tissue infections
Which of the following is a characteristic of Staphylococcus aureus?
It produces a green pigment due to the breakdown of red blood cells.
Which of the following is a disease caused by Staphylococcus aureus?
Pneumonia
What is the main function of teichoic acids in Gram-positive cocci?
To provide structural support to the cell wall
Which group of antibiotics is effective against Gram-positive cocci?
Penicillins
Which of the following is a characteristic of Staphylococcus saprophyticus?
It causes urinary tract infections in sexually active young women.
What is the role of beta-lactam antibiotics in inhibiting the growth of Gram-positive cocci?
They inhibit the synthesis of peptidoglycan in the cell wall of the bacteria.
Which of the following is NOT true about Gram-positive cocci?
They are resistant to vancomycin.
Which type of agar is commonly used for the isolation of Gram-positive cocci?
Blood agar
Which of the following is a characteristic of Staphylococcus epidermidis?
It is a common cause of skin infections.
Which of the following infections can be caused by Staphylococcus aureus?
Respiratory tract infections
Which of the following is a clinical effect caused by enterotoxins produced by Staphylococcus aureus?
Diarrhea and vomiting
Which of the following is a characteristic of toxic shock syndrome toxin-1 (TSST-1) produced by Staphylococcus aureus?
It is absorbed through the vaginal mucosa
Which of the following is a clinical effect caused by exfoliative toxins produced by Staphylococcus aureus?
Skin sloughing
Which of the following is a characteristic of cytolytic toxins produced by Staphylococcus aureus?
They affect leukocytes
Which enzyme is commonly found in all Staphylococcus species?
Catalase
Which protein, found in the cell wall of Staphylococcus aureus, can bind and neutralize the Fc portion of IgG?
Protein A
Which virulence factor of Staphylococcus aureus resists phagocytosis?
Capsule formation
Which extracellular substance, produced by all Staphylococcus species, contributes to biofilms generated on plastic, catheters, and foreign objects?
ESS
Which bacterial enzyme is commonly found in most aerobic and facultative anaerobic organisms other than Streptococcus species?
Catalase
Which of the following is a characteristic of Staphylococcus aureus?
It produces TSST-1
Which of the following is a positive result for the catalase test?
Bubbling immediately after adding 3% H2O2
Which of the following is a negative result for the coagulase slide test?
No clumping
Which of the following is a positive result for the DNAse test?
Clearing or halo around the colony spot
Which of the following is a negative result for the oxidase test?
No color development
Which of the following is a resistant result for the bacitracin test?
Growth up to the edge of the disc
Which of the following is a fermentative result for the glucose OF oxidation/fermentation test?
Acid production in the open tube only
Which of the following is a positive result for the latex agglutination test?
Clumping in less than 10 seconds
Which of the following is a negative result for the novobiocin susceptibility test?
No zone of inhibition
Which of the following is a characteristic of Staphylococcus saprophyticus?
Negative result for the coagulase slide test
Which of the following is a characteristic of Staphylococcus epidermidis?
Negative result for the coagulase slide test
Test your knowledge on Gram Positive Cocci with this introductory quiz. Learn about the ubiquity and prevalence of these bacteria in various environments, including human and animal bodies.
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