Mycobacterium senegalense
Cultural characteristics
Biochemical characters
Phylum Actinobacteria, Class Actinobacteria, Order Actinomycetales, Suborder Corynebacterineae, Family Mycobacteriaceae, Genus
Mycobacterium senegalense (Chamoiseau 1973) Chamoiseau 1979.

Old synonym: "Mycobacterium farcinogenes subsp. senegalense". Member of the
Mycobacterium fortuitum complex.
Strongly acid-alcohol-fast rods. Produce short or long, bent, and branched filaments
grouped in clumps or in a tangled lacy network, not fragmenting into bacillary forms.
Cords are not produced. Gram-positive.
Colonies on Lowenstein-Jensen medium are non-chromogenic or ochre in color,
rough and convoluted, firmly attached to the medium, and surrounded by an
iridescent halo. In broth medium, a thick, rough, dry growth develops with a whitish
surface veil, but the broth remains clear. Growth occurs in 2-5 days in liquid or on
solid medium. Grows at 25, 37  and 42 ºC, but not at 45 ºC. Grows on media
supplemented with 5% (w/v) NaCl, but not on MacConkey.
Isolated from lesions of farcy in African bovines. Isolated from human diseases (including skin and soft-tissue infections,
posttraumatic or postsurgical osteomyelitis, catheter-related infections, and possibly pulmonary infections.
Resistant to thiophen-2-carboxylic acid hydrazide (TCH), ethambutol, penicillin, isoniazid and streptomycin. Susceptible to rifampin,
capreomycin, dapsone, viomycin and cycloserine.
Produce bovine farcy; do not affect other domestic or non-domestic animals. Mycobacterium farcinogenes causes the disease in East
and Central Africa and
Mycobacterium senegalense in West Africa (Senegal).
Isolated from humans with clinical signs of tuberculosis.
Experimental infections: produce a massive, generalized peritonitis in guinea pigs.
  1. 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.
  2. Chamoiseau G. Etiology of farcy in African bovines: nomenclature of the causal organisms Mycobacterium farcinogenes
    Chamoiseau and Mycobacterium senegalense (Chamoiseau) comb. nov. International Journal of Systematic Bacteriology 1979;
  3. Hamid, M. E. (2012). Epidemiology, pathology, immunology and diagnosis of bovine farcy: A review. Preventive Veterinary
    Medicine, 105(1-2), 1–9. doi:10.1016/j.prevetmed.2012.01.004.
  4. Ridell, M., and M. Goodfellow. 1983. Numerical classification of Mycobacterium farcinogenes, Mycobacterium senegalense and
    related taxa. J. Gen. Microbiol. 129:599-611.
  5. Lidia García-Agudo, Iria Jesus, Manuel Rodriguez-Iglesias, Pedro Garcia-Martos. EVALUATION OF INNO-LIPA MYCOBACTERIA
    V2 ASSAY FOR IDENTIFICATION OF RAPIDLY GROWING MYCOBACTERIA. Brazilian Journal of Microbiology (2011) 42: 1220-
    1226, ISSN 1517-8382.
  6. Levy-Frebault V, Rafidinarivo E, Prome JC, Grandry J, Boisvert H, David HL. Mycobacterium fallax sp. nov. Int. J. Syst. Bacteriol.
    1983; 33:336-343.
  7. Ausina V, Luquin M, Garcia Barcelo M, Laneelle MA, Levy-Frebault V, Belda F, Prats G. Mycobacterium alvei sp. nov. Int J Syst
    Bacteriol 1992; 42:529-535.
  8. Shojaei H, Daley C, Gitti Z, Hashemi A, Heidarieh P, Moore ER, Naser AD, Russo C, van Ingen J, Tortoli E. Mycobacterium
    iranicum sp. nov., a rapidly growing scotochromogenic species isolated from clinical specimens on three different continents. Int
    J Syst Evol Microbiol 2013; 63:1383-1389.
  9. 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 arylsulphatase (3 and 7 days), catalase, thermostable catalase (68 ºC), nitrate reduction, acetamidase,
allantoinase, benzamidase, formamidase, nicotinamidase, pyrazinamidase, isonicotinamidase, urea hydrolysis.
Can utilize mannitol, citrate, benzoate, pyruvate and malonate.

Negative results for semiquantitative catalase test, iron uptake, niacin accumulation, neutral red test, and Tween hydrolysis,
(c) Costin Stoica
Culture media
Biochemical tests
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