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Infectious Disease Online

Pathology Atypical

Mycobacterial Infection

Dr Sampurna Roy MD




Atypical mycobacterial infection is caused by a type of mycobacterium other than Tuberculosis.

Mycobacteria other than Mycobacterium tuberculosis are widely distributed in nature and infrequently cause disease though several species are potentially pathogenic.

The widely used classification of Runyon based on pigment production and growth rate has been superseded by classifications in which the organisms are grouped according to biochemical and antigenic similarities.

The major pathogenic groups include the following:

1. Slow-growing potential pathogens:

i) Mycobacterium Avium Intracellulare

ii) Mycobacterium Kansasii

iii) Mycobacterium Marinum

iv) Mycobacterium Ulcerans

2. Rapidly growing potential pathogens:

i) Mycobacterium fortuitum

ii) Mycobacterium chelonei


Further reading:

A Novel Gene, erm(41), Confers Inducible Macrolide Resistance to Clinical Isolates of Mycobacterium abscessus but Is Absent from Mycobacterium chelonae

Identification of a Chemical That Inhibits the Mycobacterial UvrABC Complex in Nucleotide Excision Repair

Regulation of Polar Peptidoglycan Biosynthesis by Wag31 Phosphorylation in Mycobacteria

Distribution of Mycobacterium ulcerans in Buruli Ulcer Endemic and Non-Endemic Aquatic Sites in Ghana

Invasive Disease Caused by Nontuberculous Mycobacteria, Tanzania

Nontuberculous mycobacterial infections.




Dr Sampurna Roy  MD

Consultant  Histopathologist (Kolkata - India)








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