Dictionary > Mycobacteria


(Science: microbiology) bacteria with unusual cell walls that are resistant to digestion, being waxy, very hydrophobic and rich in lipid, especially esterified mycolic acids. Staining properties differ from those of gram-negative and gram-positive organisms, being acid-fast. Many are intracellular parasites, causing serious diseases such as leprosy and tuberculosis. Cell wall has strong immunostimulating (adjuvant) properties due to muramyl dipeptide (MDP). Mycobacterium bovis causes tuberculosis in cattle, attenuated strain is bacille Calmette-Guerin (bCG), used for immunisation. Mycobacterium leprae is the causative agent of leprosy. Mycobacterium microti is a mycobacterium that causes tuberculosis like disease in small rodents (Microtus microtus is the vole), will infect mice but not humans and is therefore much used as a laboratory model. Releases large amounts of cAMP which may inhibit lysosome phagosome fusion. Mycobacterium tuberculosis Is an obligate anaerobic nonmotile bacterium, causative agent of tuberculosis in humans. Lives intracellularly in macrophages.

You will also like...

temperature - abiotic factor
Abiotic and Biotic Factors

This tutorial deals with the abiotic factors of the freshwater environment that determine what sort of life would be sui..

Consciousness and behavior
Consciousness and Behavior

Human consciousness and behavior are an interesting topic since they are determined and controlled by the brain. Conscio..

Golgi apparatus (3-D illustration)
Role of Golgi Apparatus & Endoplasmic Reticulum in Protein Synthesis

The endoplasmic reticulum and Golgi apparatus are the organelles involved in the translation step of protein synthesis a..

Electromagnetic spectrum of a brain
Sleep and Dreams – Neurology

While learning and intelligence are associated with the functions of a conscious mind, sleep and dreams are activities o..

Photosynthesis and respiration
Plant Metabolism

Plants are responsible for incredible feats of molecular transformation. Plant processes, such as photosynthesis, photop..

New Zealand Fauna
New Zealand’s Unique Fauna

Meet some of New Zealand's unique fauna, including endemic insects, frogs, reptiles, birds, and mammals, and investigate..