Mindblown: a blog about philosophy.
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Haemophilus aegyptius
Intracellular species associated with conjunctivitis, having characteristics similar to those of H. influenzae. A species that can cause bacterial conjunctivitis and a potentially life-threatening pediatric infection called Brazilian purpuric fever.
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Haemolytic serum
Anti-species serum (known also as haemolytic amboceptor) pre¬ pared, for example, by injecting sheep red cells into rabbits, the harvested rabbit serum plus complement being haemolytic to sheep erythrocytes. It is used as an indicator in complement fixation tests.
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Haemobartonella
Minute Gram-negative aerobic bacilli of the family of Bartonellaceae, infecting animals from insect vectors, with invasion of red cells.
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Haemagglutination inhibition test
Identification and measurement of the viral or bacterial antibody content of an immune serum by its ability to neutralize the red cell agglutination effect of the homologous virus particles or bacteria.
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Gram’s iodine
Component of Gram’s staining method: Ig iodine, 2g potassium iodide in 300 ml distilled water (cf. Lugol’s iodine).
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Glyderol monoacetate agar
Infusion agar plus 1.0 per cent glycerol monoacetate for enhancing pigment production by Staph, pyogenes.
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Glycerol egg medium
Dorset’s egg medium incorporating glycerol, to aid cultivation of Myco. tuberculosis var. hominis.
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Glycerol broth
Nutrient broth containing 5 – 7 per cent glycerol, used mainly for culture of myobacteria.
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Glycerol agar
Nutrient agar plus 5 – 8 per cent glycerol, of particular use for the cultivation of mycobacteria.
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Glutaraldehyde
Germicide capable of the (slow) destruction of spore-bearing organisms in addition to vegetative bacteria. Marketed as Cidex, glutaraldehyde is diluted to a 2 per cent solution in dilute sodium bicarbonate to give the reaction (pH 7.5 – 8.5) for most effective use. Action is best in the absence of organic matter, and the germicide is…
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