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USMLE/1
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Textbook
1. Anatomy
2. Microbiology
2.1 General bacteriology
2.2 Introduction to systemic bacteriology
2.3 Gram positive cocci
2.4 Gram negative cocci
2.5 Gram positive bacilli
2.6 Gram negative bacilli
2.7 Other important bacteria
2.7.1 Overview
2.7.2 Helicobacter pylori
2.7.3 Campylobacter jejuni
2.7.4 Haemophilus influenzae
2.7.5 Bordetella pertussis
2.7.6 Legionella pneumophila
2.7.7 Brucella
2.7.8 Mycobacteria
2.7.9 Actinomycetes
2.7.10 Nocardia
2.7.11 Mycoplasma pneumoniae
2.7.12 Treponema pallidum
2.7.13 Borrelia burgdorferi
2.7.14 Chlamydia / Chlamydophila
2.7.15 Rickettsia
2.7.16 Coxiella burnetii
2.7.17 Additional information
2.8 Virology
2.9 Parasitology
2.10 Mycology
3. Physiology
4. Pathology
5. Pharmacology
6. Immunology
7. Biochemistry
8. Cell and molecular biology
9. Biostatistics and epidemiology
10. Genetics
11. Behavioral science
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2.7.3 Campylobacter jejuni
Achievable USMLE/1
2. Microbiology
2.7. Other important bacteria

Campylobacter jejuni

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It is a major cause of diarrhea. Infection is acquired from pets such as dogs, cattle, etc, or contaminated food such as unpasteurized milk, poultry, and meat. It is a comma-shaped or “S” shaped organism with peculiar cultural characteristics such as being microaerophilic and growing well at a specific temperature of 42 degrees C.

Enterotoxin similar in effect to Cholera toxin is secreted which contributes to pathogenicity. It causes an invasive diarrhea with fever, abdominal cramps and loose, bloody stools. Infection may be followed, in very few cases, by Guillain Barre Syndrome or Reiter’s Syndrome. Culture shows Gram negative, motile, oxidase positive bacilli.

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