| Mycobacterium pseudokansasii |
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Actinobacteria, Class Actinobacteria, Order Actinomycetales, Suborder Corynebacterineae, Family Mycobacteriaceae, Genus
Mycobacterium, Mycobacterium pseudokansasii Tagini et al. 2019.
Synonym: Mycobacterium kansasii subtype III.
Mycobacterium, Mycobacterium pseudokansasii Tagini et al. 2019.
Synonym: Mycobacterium kansasii subtype III.
Acid-fast, moderately long or long rods.
Rough, photochromogenic colonies grows in about 14 days at 37 ºC on Lowenstein-
Jensen medium. Beige colonies can be obtained on 7H10 medium after 2 weeks’
growthin the same culture conditions. Grows at 25 ºC, but not at 45 ºC. No growth on
5% (w/v) NaCl or on MacConkey agar without crystal violet.
Jensen medium. Beige colonies can be obtained on 7H10 medium after 2 weeks’
growthin the same culture conditions. Grows at 25 ºC, but not at 45 ºC. No growth on
5% (w/v) NaCl or on MacConkey agar without crystal violet.
The type strain was isolated from a blood culture of a patient with a disseminated mycobacterial infection.
Resistant to TCH (5 µg/ml).
Resistant to TCH (5 µg/ml).
It is rarely pathogenic.
- Tagini F, Aeby S, Bertelli C, Droz S, Casanova C, Prod'hom G, Jaton K, Greub G. Phylogenomics reveal that Mycobacterium
kansasii subtypes are species-level lineages. Description of Mycobacterium pseudokansasii sp. nov., Mycobacterium innocens
sp. nov. and Mycobacterium attenuatum sp. nov. Int J Syst Evol Microbiol 2019; 69:1696-1704. - Jagielski Tomasz, Borowka Paulina, Bakuła Zofia, Lach Jakub, Marciniak Błazej, Brzostek Anna, Dziadek Jarosław, Dziurzynski
Mikołaj, Pennings Lian, van Ingen Jakko, Zolnir-Dovc Manca, Strapagiel Dominik.Genomic Insights Into the Mycobacterium
kansasii Complex: An Update. Front. Microbiol., 15 January 2020, doi.org/10.3389/fmicb.2019.02918. - Jimenez-Pajares MS, Herrera L, Valverde A, Saiz P, Saez-Nieto JA. Phenotypic and genotypic characteristics of Mycobacterium
kansasii strains isolated in Spain (2000-2003). Enferm InfeccMicrobiol Clin 2005;23:254-258.
Positive results for nitrate reduction, and Tween 80 hydrolysis.
Negative results for arylsulfatase (3 days), niacin accumulation, and pyrazinamidase.
Variable results for arylsulfatase (10 days), tellurite reduction, thermostable catalase (68 ºC), semi-quantitative catalase test, and
urease.
Negative results for arylsulfatase (3 days), niacin accumulation, and pyrazinamidase.
Variable results for arylsulfatase (10 days), tellurite reduction, thermostable catalase (68 ºC), semi-quantitative catalase test, and
urease.
(c) Costin Stoica
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