Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Actinobacteria, Class Actinobacteria, Order Actinomycetales, Suborder Corynebacterineae, Family Mycobacteriaceae, Genus
Mycobacterium, Mycobacterium porcinum Tsukamura et al. 1983.
Synonym: Mycobacterium fortuitum biovar III.
Member of the Mycobacterium fortuitum complex.
Acid-fast rods, 0.5 x 1.5-6.0 μm. No cross-barring,cord formation, or mycelium
production.
Colonies on egg media are smooth to rough and non-photochromogenic. Colonies
on modified Sauton agar medium (2) are rough and dry. Growth occurs after 3
days on egg media and at 28, 37, and 42 but not 45 ºC. Grows on 5% (w/v) NaCl.
Tolerant to 0.2% picric acid, 0.2% sodium nitrite, and 0.1% sodium salicylate on
modified Sauton agar medium.
Isolated from lymph nodes of swine and from human clinical sources (sputum, wounds, inguinal node).
Resistant to p-nitrobenzoic acid (0.5 mg/ml), thiophene-2-carboxylic acid hydrazide (1 μg/ml), rifampin (25 μglml), ethambutol (5
μg/ml), sodium p-aminosalicylate (2 mg/ml), sodium salicylate (0.5 mg/ml), and hydroxylamine hydrochloride (0.5 mg/ml).
Produce tuberculosis-like lymphadenitis.
- Tsukamura M, Nemoto H, Yugi H. Mycobacterium porcinum sp. nov., a porcine pathogen. Int. J. Syst. Bacteriol. 1983; 33:162-165.
- Schinsky MF, Morey RE, Steigerwalt AG, Douglas MP, Wilson RW, Floyd MM, Butler WR, Daneshvar MI, Brown-Elliott BA, Wallace
RJJ, et al. Taxonomic variation in the Mycobacterium fortuitum third biovariant complex: description of Mycobacterium boenickei
sp. nov., Mycobacterium houstonense sp. nov., Mycobacterium neworleansense sp. nov. and Mycobacterium brisbanense sp.
nov. and recognition of Mycobacterium porcinum from human clinical isolates. Int J Syst Evol Microbiol 2004; 54:1653-1667.
- 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.
- Lamy B, Marchandin H, Hamitouche K, Laurent F. Mycobacterium setense sp. nov., a Mycobacterium fortuitum-group organism
isolated from a patient with soft tissue infection and osteitis. Int J Syst Evol Microbiol 2008; 58:486-490.
Positive results for arylsulfatase (3 days), semi-quantitative catalase test (> 100 mm), thermo-stable catalase (68 ºC), beta-esterase,
acetamidase, nicotinamidase, pyrazinamidase , allantoinase, succinamidase and urease.
Can utilize acetate, citrate, succinate, malate, pyruvate, benzoate, fumarate, ethanol, n-propanol, n-butanol, isobutanol, propylene
glycol, 1,3-butylene glycol, 2,3-butylene glycol, glucose, fructose, mannose, trehalose, inositol, mannitol, glutamate, serine,
glucosamine, acetamide, monoethanolamine, and trimethylenediamine.
Negative results for acid phosphatase, alpha-esterase (variable), beta-galactosidase, niacin production, nitrate reduction,
benzamidase, isonicotinamidase, salicylamidase, malonamidase, and Tween 80 hydrolysis.
No utilization of benzamide, malonate, 1,4-butylene glycol, sucrose, galactose, arabinose, xylose, rhamnose, and sorbitol.
(c) Costin Stoica