Mycobacterium agri

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Mycobacterium agri

Description

Microscopy

Gram-positive, nonmotile and acid-fast rods (3-7µm long). Frequently join to grow in long threads.

Colony characteristics

Rough, and nonphotochromogenic colonies.

Physiology

Rapid growth on egg media at 22-45°C, not at 52°C, in less than 5 days.
Niacin negative, catalase positive, β-galactosidase usually positive.
Tween 80 not hydrolysed after 14 days.
Resistant to 5% NaCl, p-nitrobenzoic acid (0.5mg/ml) and thiophene-2-carboxylic acid hydrazide (1mg/l).

Pathogenesis

Not associated with disease.

Distribution

Found in soil world-wide

Type Strain

Strain 90012 = ATCC 27406 = CCUG 37673 A = CIP 105391 = DSM 44515 = JCM 6377.

References

Tsukamura,M. 1981. Numerical analysis of rapidly growing, nonphotochromogenic mycobacteria, including Mycobacterium agri (Tsukamura 1972) Tsukamura sp. nov., nom. rev. Int. J. Syst. Bacteriol. 31, 247-258.

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