Phylum Actinobacteria, Class Actinobacteria, Order Actinomycetales, Suborder Corynebacterineae, Family Mycobacteriaceae, Genus
Mycobacterium, Mycobacterium heraklionense Tortoli et al. 2013.
Member of the Mycobacterium terrae complex.
Acid-fast rods, with some coccoid forms. No production of branches, aerial hyphae or
Colonies are smooth and unpigmented both in the dark and after light exposure.
Mature growth is obtained in solid media after 5-12 days incubation at temperatures
between 25 and 37 ºC. No growth at 45 ºC
Does not grow on MacConkey agar without crystal violet.
Isolated from various human clinical samples in Greece, Italy, India and United States.
Susceptible to clarithromycin. Resistant to thiophene carboxylic acid, tiacetazone, isoniazid, quinolones, rifampicin, sulfamethoxazole
and doxycycline. Variable to hydroxylamine and ethambutol.
Pulmonary infections and a case of tenosynovitis in an immunocompetent patient.
- Tortoli E, Gitti Z, Klenk HP, Lauria S, Mannino R, Mantegani P, Mariottini A, Neonakis I. Survey of 150 strains belonging to the
Mycobacterium terrae complex and description of Mycobacterium engbaekii sp. nov., Mycobacterium heraklionense sp. nov. and
Mycobacterium longobardum sp. nov. Int J Syst Evol Microbiol 2013; 63:401-411.
- Tortoli E. Microbiological Features and Clinical Relevance of New Species of the Genus Mycobacterium. Clinical Microbiology
Reviews Oct 2014, 27 (4) 727-752; DOI: 10.1128/CMR.00035-14.
- Jamal Saad, Michael Phelippeau, May Khoder, Marc Levy, Didier Musso & Michel Drancourt. “Mycobacterium mephinesia”, a
Mycobacterium terrae complex species of clinical interest isolated in French Polynesia. Scientific Reports | (2019) 9:11169 | https:
Positive results for thermostable catalase (68 ºC), catalase semiquantitative test, nitrate reductase, and Tween 80 hydrolysis.
Negative results for niacin accumulation, arylsulfatase activity (3 days), beta-glucosidase, tellurite reduction and urease.
(c) Costin Stoica