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Slow growing, mesophilic, photochromogenic species which is frequently associated with definite pulmonary infection.  

Non-pigmented, rapidly growing mesophilic mycobacterium the infective role of which is variable. Ubiquitous in distribution. A microscopic germ that normally exists in tap water in small numbers.  

The causative organism of bovine tuberculosis, infective also to man (lungs, joints, intestines). Slow growing (‘dysgonic’) compared with tuberculosis, and glycerin no aid to growth. Non- pigmented, growth aided by pyruvate, very pathogenic to rabbit. The organism that causes tuberculosis in cows and, less commonly, in humans.  

Rapid growing mesophilic photochromogen apparently identical with marinum, but found in temperate waters, especially swimming baths. First isolates grow best at 33°C.  

Species normally infecting fowls but occasionally transmitted to man. Higher optimum growth temperature (40-44°C) than Myco. tuberculosis. Non-pigmented.  

The power of true directional movement (as opposed to Brownian movement) in micro-organisms, conferred by flagella in many species, and by bodily flexion in the case of the spirochaetes.  

Further Moraxella species associated with conjuctivitis, but not requiring blood or serum for growth. The title derives from the ability of the organism to liquefy gelatin at 22°C. The colony pits Loeffler medium as does M. lacunata.  

Species associated with conjunctivitis; requires serum or blood agar for growth. Colonies on Loeffler’s serum medium produce pits (lacunae) on the slope surface. Previously known as Morax – Axenfeld bacillus.  

Genus within the bacteriological family of the Brucellaceae, consisting of Gram-negative aerobic non-motile rods, some 2μm x 1μm, in pairs end-to-end. Catalase and oxidase positive, no action on sugars. Growth aided by moist media which include blood or serum. A genus of gram-negative coccobacilli in the family Neisseriaceae; most are nonpathogenic inhabitants of mammalian mucous…

Modification of the antibiotic sensitivity testing of mycobacteria in which the resistance ratio is determined not in relation to the control organism Myco. tuberculosis H.37Rv, but to the modal sensitivity of a battery of known sensitive wild strains.