-
Gram positive cocci
- Staphylococcus aureus
- Staph. epidermidis
- Streptococcus pyogenes
- Strep. pneumoniae
- Enterococcus
-
Gram negative cocco-bacilli
- Haemophilus influenzae &
- Moraxella catarrhalis,
- Neisseria gonorrheae
- Neisseria meningitidis
-
Gram positive rods
- Corynebacterium
- Listeria,
- Bacillus
- Clostridium tetani, perfringens, botulinum
- Clostridium difficile
- Actinomyces
- Nocardia
-
Gram neg. rods – facult. aerobes
Enteric tract organisms
Pathogenic in & outside GI tract
- Escherichia coli
- Salmonella
-
Enteric tract organisms
Pathogenic primarily inside GI tract
- Shigella
- Vibrio
- Campylobacter
- Helicobacter
- Aeromonas
-
Enteric tract organisms
Pathogenic outside GI tract
- Klebsiella-Enterobacter-Citrobacter-Serratia group,
- Proteus-Providencia- Morganella group,
- Pseudomonas-Burkholderia-Stenotrophomonas group
- Acinetobacter
-
Gram negative rods - anaerobes
- Bacteroides sp
- Prevotella
- Porphyromonas
- Fusobacteria (Fusarium)
-
Respiratory tract organisms
- Haemophilus influenzae &
- Moraxella catarrhalis
- Legionella pneumophila
- Bordetella pertussis
-
Organisms from animal sources
- Brucella
- Francisella
- Pasteurella
- Yersinia pestis
-
Not Readily Gram Stained
Acid fast bacilli
Lack cell wall
Spirochetes
- Mycobacterium
- Mycoplasma
- Treponema pallidum
- Leptospira
- Borrelia burgdorferi
- Anaplasma
-
Non-obligate intracellular parasites
- Chlamydia trachomatis
- Chlamydophila pneumoniae
- Rickettsia sp
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