| Staphylococcus aureus |
Staphylococcaceae |
Skin infections, osteomyelitis, pneumonia, sepsis, endocarditis |
Golden-yellow colonies, beta-hemolytic, catalase-positive. |
| Streptococcus pyogenes |
Streptococcaceae |
Pharyngitis, scarlet fever, rheumatic fever, necrotizing fasciitis |
Small, clear colonies; beta-hemolytic on blood agar. |
| Streptococcus pneumoniae |
Streptococcaceae |
Pneumonia, meningitis, otitis media |
Alpha-hemolytic; greenish colonies on blood agar. |
| Bacillus anthracis |
Bacillaceae |
Anthrax (cutaneous, inhalational, gastrointestinal) |
Large, non-hemolytic, ground-glass appearance on agar. |
| Clostridium tetani |
Clostridiaceae |
Tetanus |
Grayish-white, irregular colonies; anaerobic. |
| Clostridium botulinum |
Clostridiaceae |
Botulism |
Grayish-white colonies; anaerobic. |
| Listeria monocytogenes |
Listeriaceae |
Listeriosis |
Small, grayish colonies; beta-hemolytic. |
| Mycobacterium tuberculosis |
Mycobacteriaceae |
Tuberculosis |
Non-pigmented, rough colonies; acid-fast bacillus. |
| Corynebacterium diphtheriae |
Corynebacteriaceae |
Diphtheria |
Small, round, grayish colonies; appears as "Chinese letter" arrangement under the microscope. |
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