Mycobacterium intermedium
Encyclopedia
Mycobacterium intermedium
Etymology
: Latin; intermedium, meaning between, rapidly and slowly-growing mycobacteria.
, and nonmotile acid-fast
coccobacilli (2.0 µm x 2.6 µm).
Colony characteristics
Physiology
Differential characteristics
Strain 1669/91 = ATCC 51848 = CCUG 37583 = CIP 104542 = DSM 44049 = JCM 13572
Etymology
Etymology
Etymology is the study of the history of words, their origins, and how their form and meaning have changed over time.For languages with a long written history, etymologists make use of texts in these languages and texts about the languages to gather knowledge about how words were used during...
: Latin; intermedium, meaning between, rapidly and slowly-growing mycobacteria.
Description
Gram-positiveGram-positive
Gram-positive bacteria are those that are stained dark blue or violet by Gram staining. This is in contrast to Gram-negative bacteria, which cannot retain the crystal violet stain, instead taking up the counterstain and appearing red or pink...
, and nonmotile acid-fast
Acid-fast
Acid-fastness is a physical property of certain bacteria, specifically their resistance to decolorization by acids during staining procedures.Acid-fast organisms are difficult to characterize using standard microbiological techniques Acid-fastness is a physical property of certain bacteria,...
coccobacilli (2.0 µm x 2.6 µm).
Colony characteristics
- Eugonic, smooth and photochromogenic colonies (3–5mm in diameter) on Löwenstein-Jensen medium.
Physiology
- Growth on Löwenstein-Jensen medium at 22°C, 31°C, 37°C and 41°C, (optimal temperature between 31°C and 37°C), within 2–3 weeks.
- Susceptible to ethambutolEthambutolEthambutol is a bacteriostatic antimycobacterial drug prescribed to treat tuberculosis. It is usually given in combination with other tuberculosis drugs, such as isoniazid, rifampicin and pyrazinamide....
and rifampin. - Resistant to isoniazidIsoniazidIsoniazid , also known as isonicotinylhydrazine , is an organic compound that is the first-line antituberculosis medication in prevention and treatment. It was first discovered in 1912, and later in 1951 it was found to be effective against tuberculosis by inhibiting its mycolic acid...
and streptomycinStreptomycinStreptomycin is an antibiotic drug, the first of a class of drugs called aminoglycosides to be discovered, and was the first antibiotic remedy for tuberculosis. It is derived from the actinobacterium Streptomyces griseus. Streptomycin is a bactericidal antibiotic. Streptomycin cannot be given...
.
Differential characteristics
- Phylogenetic position between rapidly and slowly-growing mycobacteria.
- M. asiaticum is phenotypically very similar, but can be distinguished by its growth at 22°C, and by its dysgonic growth.
Type strain
- Repeatedly isolated from sputum from a patient with pulmonary disease.
Strain 1669/91 = ATCC 51848 = CCUG 37583 = CIP 104542 = DSM 44049 = JCM 13572