Bacterial classification by gram stain, shape, and growth requirements, with the key lab test used to identify each organism.
45 cards · basic cards · AI-written, checked twice. Edit anything.
- What is the Gram stain and cellular arrangement of Staphylococcus?
- Gram-positive cocci in clusters
- What is the Gram stain and cellular arrangement of Streptococcus?
- Gram-positive cocci in chains
- Which lab test distinguishes Staphylococcus from Streptococcus, based on breakdown of hydrogen peroxide?
- Catalase test (Staphylococcus is catalase-positive)
- Is Streptococcus catalase-positive or catalase-negative?
- Catalase-negative
- Which coagulase test result identifies Staphylococcus aureus among staphylococci?
- Coagulase-positive
- Which coagulase-negative staphylococcus is novobiocin-sensitive?
- Staphylococcus epidermidis
- Which coagulase-negative staphylococcus is novobiocin-resistant?
- Staphylococcus saprophyticus
- Which streptococcus species is optochin-sensitive?
- Streptococcus pneumoniae
- Which alpha-hemolytic streptococcal group is optochin-resistant?
- Viridans streptococci
- Which streptococcus is bacitracin-sensitive?
- Group A Streptococcus (Streptococcus pyogenes)
- Which streptococcus is bacitracin-resistant?
- Group B Streptococcus (Streptococcus agalactiae)
- Which streptococcus gives a positive CAMP test?
- Group B Streptococcus (Streptococcus agalactiae)
- What does alpha hemolysis look like on blood agar?
- Partial hemolysis with a greenish discoloration
- What does beta hemolysis look like on blood agar?
- Complete clearing around the colony
- What does gamma hemolysis look like on blood agar?
- No hemolysis