. Pathogenic microörganisms; a practical manual for students, physicians, and health officers . lasmfrom penetration by the germicidal agent. It is not always destroyedby thegastric juice in the stomach, as is shown by successful infectionexperiments in susceptible animals by feeding them with tubercle are destroyed in sputum in six hours or less by the addition of anequal quantity of a 5 per cent, solution of carbolic acid. Bichloride ofmercury is less suitable for the disinfection of sputum as it combineswith the mucus and forms a more or less protecting envelope. Iodoformhas n
. Pathogenic microörganisms; a practical manual for students, physicians, and health officers . lasmfrom penetration by the germicidal agent. It is not always destroyedby thegastric juice in the stomach, as is shown by successful infectionexperiments in susceptible animals by feeding them with tubercle are destroyed in sputum in six hours or less by the addition of anequal quantity of a 5 per cent, solution of carbolic acid. Bichloride ofmercury is less suitable for the disinfection of sputum as it combineswith the mucus and forms a more or less protecting envelope. Iodoformhas no effect upon cultures until 5 per cent, is added. The fumes fromfour pounds of burning sulphur to each 1000 cubic feet of air space willkill tubercle bacilli in eight hours when fully exposed to the action of thegas, providing they are moist, or abundant moisture is present in the gas is quicker in its action, but not much more ounces of formalin should be employed for each 1000 cubic feet ofair space. The tubercle bacillus resists the action of alkaline hypo-. FiG. 137.—Tubercle bacilli. Impressionpreparation from small colony on coagu-lated blood serum. X 1000 diameters. v- 368 BACILLUS AND BACTERIOLOGY OF TUBERCULOSIS chloride solution ( antiformin) in dilutions which quickly dissolvenon-acid fast bacteria. The tubercle bacillus in sputum when exposed to direct sunlight iskilled in from a few minutes to several hours, according to the thick-ness of the layer and the season of the year; it is also usually destroyedby diffuse dayhght in from five to ten days when placed near a windowin fine powder. Protected in cloth the bacilli survive exposure tolight for longer periods. Tuberculous sputum expectorated uponsidewalks, etc., when left undisturbed in the shade may be infectiousfor weeks, but when exposed to the action of direct sunlight will, inmany cases, especially in summer, be disinfected by the time it is incondition to be carried into th
Size: 1569px × 1592px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauth, bookcentury1900, bookdecade1910, bookidcu31924000235212
