Grand Round: Mycobacterium paratuberculosis cervical lymphadenitis, followed five years later by terminal ileitis similar to Crohn's disease

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Abstract
M paratuberculosis belongs to the M avium-intracellulare group.4 The term paratuberculosis suggests close similarity to M tuberculosis, but in truth it is very different. Unlike M tuberculosis, it can survive in the environment and is highly resistant in vivo to most standard antituberculous drugs. M paratuberculosis cannot be reliably detected by culture in the laboratory; different subtypes of the organism with different preferred hosts5 6 range from very slow growing to unculturable.