| Mycobacterium interjectum |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Actinobacteria, Class Actinobacteria, Order Actinomycetales, Suborder Corynebacterineae, Family Mycobacteriaceae, Genus
Mycobacterium, Mycobacterium interjectum Springer et al. 1995.
Member of the Mycobacterium simiae complex.
Mycobacterium, Mycobacterium interjectum Springer et al. 1995.
Member of the Mycobacterium simiae complex.
Acid–alcohol-fast, often pleomorphic coccobacilli, 0.7-2.0 x 0.6-1.0 μm. May exhibit
filaments up to 6.0 μm. No production of spores, capsules or aerial hyphae.
filaments up to 6.0 μm. No production of spores, capsules or aerial hyphae.
Colonies on Lowenstein-Jensen medium after 3-4 week incubation are dysgonic,
smooth, scotochromogenic, yellowish, and 1-2 mm in diameter. Temperature range
for growth is 31-37 ºC; does not grow at 22, 25 or 41, 42 or 45 ºC. No growth on media
supplemented with 5% (w/v) NaCl or on MacConkey agar without crystal violet.
smooth, scotochromogenic, yellowish, and 1-2 mm in diameter. Temperature range
for growth is 31-37 ºC; does not grow at 22, 25 or 41, 42 or 45 ºC. No growth on media
supplemented with 5% (w/v) NaCl or on MacConkey agar without crystal violet.
Isolated from an 18-month-old child with cervical lymphadenitis.
Susceptible to rifampin (32 µg/ml). Resistant to ethambutol (2 µg/ml), isoniazid (1 µg/ml), and streptomycin (8 µg/ml).
Susceptible to rifampin (32 µg/ml). Resistant to ethambutol (2 µg/ml), isoniazid (1 µg/ml), and streptomycin (8 µg/ml).
Lymphadenitis.
- John G. Magee and Alan C. Ward 2012. Family III. Mycobacteriaceae Chester 1897, 63AL in Bergey’s Manual of Systematic
Bacteriology, Volume Five The Actinobacteria, Part A, Michael Goodfellow & al. (editors), 312-375. - Springer B, Kirschner P, Rost-Meyer G, Schroder KH, Kroppenstedt RM, Bottger EC. Mycobacterium interjectum, a new species
isolated from a patient with chronic lymphadenitis. J Clin Microbiol 1993; 31:3083-3089. - Reischl U, Emler S, Horak Z, Kaustova J, Kroppenstedt RM, Lehn N, Naumann L. Mycobacterium bohemicum sp. nov., a new
slow-growing scotochromogenic mycobacterium. Int J Syst Bacteriol 1998; 48:1349-1355. - Stephen Berger 2019. GIDEON Guide to Medically Important Bacteria, eBook.
- Turenne CY, Thibert L, Williams K, Burdz TV, Cook VJ, Wolfe JN, Cockcroft DW, Kabani A. Mycobacterium saskatchewanense sp.
nov., a novel slowly growing scotochromogenic species from human clinical isolates related to Mycobacterium interjectum and
Accuprobe-positive for Mycobacterium avium complex. Int J Syst Evol Microbiol 2004; 54:659-667. - Rastogi N, Legrand E, Sola C. The mycobacteria: an introduction to nomenclature and pathogenesis. Rev Sci Tech. 2001;20(1):21‐
54. doi:10.20506/rst.20.1.1265
Positive results for arylsulfatase (10 days - weak reaction), alpha-esterase, catalase (semi-quantitative), thermotolerant catalase (68
ºC), nicotinamidase, pyrazinamidase, tellurite reduction, and urease.
Negative results for acid phosphatase, arylsulfatase (3 days), beta-esterase, niacin accumulation, nitrate reduction, and Tween 80
hydrolysis.
Variable results for beta-galactosidase.
ºC), nicotinamidase, pyrazinamidase, tellurite reduction, and urease.
Negative results for acid phosphatase, arylsulfatase (3 days), beta-esterase, niacin accumulation, nitrate reduction, and Tween 80
hydrolysis.
Variable results for beta-galactosidase.
(c) Costin Stoica
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