Mycobacterium virginiense
Taxonomy
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Phylum Actinobacteria, Class Actinobacteria, Order Actinomycetales, Suborder Corynebacterineae, Family Mycobacteriaceae, Genus
Mycobacterium,
Mycobacterium virginiense Vasireddy et al. 2017.
Acid-fast rods.
Colonies are slowly growing (more than 7 days), and nonpigmented on Middlebrook
7H10 agar. Optimal growth is observed at 35 ºC. No growth at 42°C. No growth on 5%
NaCI media.
Isolated from a biopsy of the lesion on the index finger in a 58-year-old woman with tenosynovitis, from Virginia.
Susceptible to clarithromycin, ethambutol, rifabutin, and trimethoprim-sulfamethoxazole. Resistant to thiophen-2-carboxylic acid
hydrazide (TCH), rifampin, amikacin,  ofloxacin, moxifloxacin, ciprofloxacin, doxycycline, minocycline, streptomycin 2 and 10 µg/ml.
Undetermined. Associated with  tenosynovitis.
  1. Vasireddy R, Vasireddy S, Brown-Elliott BA, Wengenack NL, Eke UA, Benwill JL, Turenne C, Wallace RJJ. Correction for Vasireddy
    et al., Mycobacterium arupense, Mycobacterium heraklionense, and a Newly Proposed Species, "Mycobacterium virginiense" sp.
    nov., but Not Mycobacterium nonchromogenicum, as Species of the Mycobacterium terrae Complex Causing Tenosynovitis and
    Osteomyelitis. J Clin Microbiol 2017; 55:985.
  2. Vasireddy R, Vasireddy S, Brown-Elliott BA, Wengenack NL, Eke UA, Benwill JL, Turenne C, Wallace RJ Jr. Mycobacterium
    arupense, Mycobacterium heraklionense, and a Newly Proposed Species, "Mycobacterium virginiense" sp. nov., but Not
    Mycobacterium nonchromogenicum, as Species of the Mycobacterium terrae Complex Causing Tenosynovitis and Osteomyelitis.
    J Clin Microbiol. 2016 May;54(5):1340-51. doi: 10.1128/JCM.00198-16. Epub 2016 Mar 9. Erratum in: J Clin Microbiol. 2017 Mar;55
    (3):985. PMID: 26962085; PMCID: PMC4844723.
  3. Ridderhof JC, Wallace RJ, Jr, Kilburn JO, Butler WR, Warren NG, Tsukamura M, Steele LC, Wong ES. 1991. Chronic tenosynovitis
    of the hand due to Mycobacterium nonchromogenicum: use of high-performance liquid chromatography for identification of
    isolates. Rev Infect Dis 13:857–864. doi:10.1093/clinids/13.5.857.
Positive results for nitrate reduction, semiquantitative catalase (>45 mm), heat-stable catalase, nicotinamidase, pyrazinamidase, and
Tween hydrolysis.

Negative results for arylsulfatase (3 and 14-days), niacin accumulation, tellurite reduction, and urease.
(c) Costin Stoica
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