| Mycobacterium scrofulaceum |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Actinobacteria, Class Actinobacteria, Order Actinomycetales, Suborder Corynebacterineae, Family Mycobacteriaceae, Genus
Mycobacterium, Mycobacterium scrofulaceum Prissick and Masson 1956.
Old synonym: "Mycobacterium marianum".
Mycobacterium, Mycobacterium scrofulaceum Prissick and Masson 1956.
Old synonym: "Mycobacterium marianum".
Acid-fast, short to long rods or filaments. No cord formation.
Colonies on Middlebrook medium and Lowenstein-Jensen medium are usually
smooth and yellow to orange in color, but occasional strains may produce rough
growth. Growth occurs in 7 or more days (28) at 37 ºC. Temperature range for growth
is 22-42 ºC; optimal growth is at 35 ºC. No growth on media supplemented with 5%
(w/v) NaCl, or on MacConkey agar.
smooth and yellow to orange in color, but occasional strains may produce rough
growth. Growth occurs in 7 or more days (28) at 37 ºC. Temperature range for growth
is 22-42 ºC; optimal growth is at 35 ºC. No growth on media supplemented with 5%
(w/v) NaCl, or on MacConkey agar.
First isolated from a closed lesion of cervical lymphadenitis in a child. Also found in human sputum and gastric lavage samples.
Resistant to tiophene-2-carboxylic acid hydrazide (1 µg/ml), hydroxylamine (500 µg/ml), isoniazid (1 µg/ml), and streptomycin (8
µg/ml). Susceptible to ethambutol (2 µg/ml) and rifampin (32 µg/ml).
Resistant to tiophene-2-carboxylic acid hydrazide (1 µg/ml), hydroxylamine (500 µg/ml), isoniazid (1 µg/ml), and streptomycin (8
µg/ml). Susceptible to ethambutol (2 µg/ml) and rifampin (32 µg/ml).
Rarely found in pus from suppurating cervical lymph nodes, especially in children, and considered to be the etiologic agent of the
lesions. Occasionally associated with pulmonary disease.
lesions. Occasionally associated with pulmonary disease.
- 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. - Loredana Gabriela Popa, Mircea Ioan Popa 2009. Identificarea bacililor acido-rezistenti in: Tratat de microbiologie clinica, Dumitru
Buiuc, Marian Negut, ed. a III-a, Editura Medicala, 881-890, ISBN (13) 978-973-39-0593-6. - Tsukamura M. Numerical Classification of Slowly Growing Mycobacteria. International Journal of Systematic Bacteriology, Oct. 1976,
p. 409-420. - Stephen Berger 2019. GIDEON Guide to Medically Important Bacteria, eBook.
- Tsukamura M, Yano I, Imaeda T. Mycobacterium fortuitum subspecies acetamidolyticum, a new subspecies of Mycobacterium
fortuitum. Microbiol Immunol 1986; 30:97-110. - Koksalan OK, Aydin MD, Eraslan S, Bekiroglu N. Reliability of cord formation in BACTEC 12B/13A media for presumptive
identification of Mycobacterium tuberculosis complex in laboratories with a high prevalence of Mycobacterium tuberculosis. Eur J
Clin Microbiol Infect Dis. 2002;21(4):314‐317. doi:10.1007/s10096-002-0701-9.
Positive results for catalase (inactivated at 68°C), semi-quantitative catalase test, and urease.
Can utilize pyruvate, and propionate as sole carbon source in the presence of ammonia.
Negative results for arylsulphatase (3 days), acid phosphatase, beta-galactosidase, iron uptake, niacin production, nitrate reduction,
and Tween 80 hydrolysis.
No utilization of benzoate, citrate, succinate, malate and fumarate.
Variable results for alpha- and beta-esterase, arylsulphatase (10 days), nicotinamidase, pyrazinamidase, and tellurite reduction.
Can utilize pyruvate, and propionate as sole carbon source in the presence of ammonia.
Negative results for arylsulphatase (3 days), acid phosphatase, beta-galactosidase, iron uptake, niacin production, nitrate reduction,
and Tween 80 hydrolysis.
No utilization of benzoate, citrate, succinate, malate and fumarate.
Variable results for alpha- and beta-esterase, arylsulphatase (10 days), nicotinamidase, pyrazinamidase, and tellurite reduction.
(c) Costin Stoica
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