MCEM Part A Study Guide/Microbiology/Specific Pathogen Groups/Streptococci and Staphylococci

< MCEM Part A Study Guide‎ | Microbiology

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Section 1: Streptococci and StaphylococciEdit

Gram-positive cocci can be divided into two groups using the catalase test. Catalase catalyses the conversion of H2O2 to water and oxygen, causing bubbles. Staphylococci produce catalase and are therefore catalase-positive, whereas Streptococci are catalase-negative.

StreptococciEdit

These are facultative anaerobes.

Streptococcus pneumoniaeEdit

Streptococcus pneumoniae in spinal fluid. FA stain (digitally colorized).

methods of spread of infection principal clinical features

Streptococcus pyogenesEdit

methods of spread of infection principal clinical features

StaphylococciEdit

Staphylococcus aureusEdit

methods of spread of infection principal clinical features

Staphylococcus epidermidisEdit

methods of spread of infection principal clinical features

Alpha-haemolytic streptococciEdit

endocarditis procedural prophylaxis