Page 36 - Review of Medical Microbiology and Immunology ( PDFDrive )

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CHAPTER 5 Classification of Medically Important Bacteria
TABLE 5–1 Classification of Medically Important Bacteria
Representative Diseases
Characteristics
I. Rigid, thick-walled cells

A. Free-living (extracellular bacteria)
1. Gram-positive
a. Cocci

Abscess of skin and other organs
Staphylococcus

b. Spore-forming rods Streptococcus Pneumonia, pharyngitis, cellulitis

(1) Aerobic
Anthrax
Bacillus
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Clostridium
Tetanus, gas gangrene, botulism
(2) Anaerobic

c. Non–spore-forming rods

(1) Nonfilamentous
Meningitis

Listeria
Actinomycosis
Actinomyces
(2) Filamentous
Nocardia

Nocardiosis
2. Gram-negative

Neisseria
a. Cocci
Gonorrhea, meningitis
b. Rods

(a) Straight
(i) Respiratory organisms
(1) Facultative Haemophilus Meningitis
Bordetella
Whooping cough
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Enterocolitis mebooksfree.com
Pneumonia
Legionella
(ii) Zoonotic organisms
Brucellosis
Brucella
Tularemia
Francisella
Cellulitis

Pasteurella

Yersinia
Plague
Urinary tract infection, diarrhea
(iii) Enteric and related organisms
Escherichia

Enterobacter
Urinary tract infection

Serratia
Pneumonia
Klebsiella

Pneumonia, urinary tract infection

Enterocolitis, typhoid fever
Salmonella
Urinary tract infection
Proteus
(b) Curved
Gastritis, peptic ulcer
Helicobacter
(2) Aerobic Shigella Enterocolitis
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Cholera
Vibrio
Pneumonia, urinary tract infection
Pseudomonas
Peritonitis
(3) Anaerobic
Bacteroides
3. Acid-fast
B. Non–free-living (obligate intracellular parasites)
Rocky Mountain spotted fever,
Rickettsia
typhus, Q fever
Urethritis, trachoma, psittacosis
Chlamydia

Syphilis
Treponema
II. Flexible, thin-walled cells (spirochetes)
Lyme disease
Borrelia

Leptospirosis
Leptospira

III. Wall-less cells
Mycoplasma
Pneumonia
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