26 Questions
What is the study of general principles of scientific classification and naming organisms known as?
Taxonomy
How are the family and genus names of microorganisms typically formatted according to international rules?
Italicized
Which enzyme is used to divide Staphylococci into pathogenic and relatively nonpathogenic strains?
Coagulase
Which species of Staphylococcus is characterized as very virulent and resistant to dessication, temperature, and salt despite not forming spores?
Staphylococcus aureus
What distinguishes Staphylococcus coagulase-negative from Staphylococcus aureus?
Lack of coagulase synthesis
Which term refers to the practical use of a classification scheme for organisms?
Identification
Based on what characteristic can organisms be organized into progressively more inclusive groups (taxons)?
Phenotypic similarities or evolutionary relationships
Which component of the Staphylococcus genus is responsible for synthesis of the enzyme coagulase?
Staphylococcus aureus
Which term refers to the systematic naming of organisms based on international rules according to their characteristics?
Nomenclature
What distinguishes Staphylococcus aureus from Staphylococcus epidermidis and Staphylococcus saprophyticus?
Virulence and multiple pathogenicity factors
Which of the following is true about S. aureus and S. epidermidis in the oral cavity?
They are frequently isolated in the oral cavity but in small quantities
In which of the following conditions can Staphylococci be found in the oral cavity?
Glossitis
What is the significance of S. aureus and S. epidermidis when isolated from polymicrobial infectious processes?
Their significance as a pathogen is unknown
Where can cavernous sinus thrombosis originate from?
Infection in the nose, sinuses, ears, or teeth
What type of infection can result in facial malignant staphylococcal infection?
Spread of infection from teeth or sinuses
In which of the following dental conditions can Staphylococci be found?
Periapical infections
What should be considered when isolating Staphylococci from cultures of the oral cavity?
The likelihood of contamination from skin
What is the significance of S. aureus and S. epidermidis being present in dental plaque of immunocompromised patients?
They might indicate a potential risk for opportunistic infections
What should be taken into account when sampling for Staphylococci in the oral cavity?
Possible contamination from skin
What can Staphylococci indicate when found in cultures from the oral cavity?
Potential opportunistic pathogens if conditions allow
Which statement about Staphylococcus aureus is FALSE?
It is catalase negative.
What is the main difference between Staphylococcus aureus and Coagulase-Negative Staphylococci?
Their involvement in colonization and pathogenesis.
Which toxin is NOT produced by Staphylococcus aureus?
Tetanolysin.
In which type of infection would you expect to see folllowulitis, furuncle, and impetigo?
Purulent infections
What is the treatment of choice for methicillin-resistant Staphylococcus aureus (MRSA)?
Glycopeptides like vancomycin
Which factor is essential for the infection by coagulase-negative Staphylococci?
Presence of foreign bodies or immunodeficiency
Test your understanding of key concepts related to taxonomy, classification, nomenclature, and identification in the context of microbiology, specifically focusing on the Staphylococcus genus.
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