Microbiology of common bacteria

Created by morr0263 

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USMLE, microbiology, medicine

Staphylococcus

Gram positive cocci

Streptococcus

Gram positive cocci

Clostridium

Gram positive anaerobic rod

Listeria

Gram postive aerobic rod

Neisseria

Gram negative cocci

Treponema

Gram negative spirochete

Camplyobacter

Gram negative spiral

Helicobacter

Gram negative spiral

Legionella

Gram negative aerobic rod

Pseudomons

Gram negative aerobic rod

Enterobacter (eg Escherichia coli)

Gram negative facultative anaerobic rod

Haemophilus

Gram negative facultative anaerobic rod

Fusobacterium

Gram negative anaerobic rod

Mycobacterium

Poorly staining, acid fast

Chlamydia

Obligate intracellular

Mycoplasma

Poorly staining, no peptidoglycan in cell wall

Gram positive cocci

Staphylococcus, Streptococcus

Gram positive anaerobic rod

Clostridium

Gram postive aerobic rod

Listeria

Gram negative cocci

Neisseria

Gram negative spirochete

Treponema

Gram negative spiral

Camplyobacter, Helicobacter

Gram negative aerobic rod

Legionella, Pseudomonas

Gram negative facultative anaerobic rod

Enterobacter (eg Escherichia coli), Haemophilus

Gram negative anaerobic rod

Fusobacterium

Poorly staining, require special techniques

Chlamydia (PCR), Mycoplasma (PCR/serology), Mycobacterium (Ziehl-Nelson Staining/Acid-fast staining)

How do you tell the difference between staphylococcus and streptococcus?

Staphylococcus is catalase positive, Streptococcus is catalase negative.

Catalase=Converts H2O2 to H2O and O2

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