Our Secret Friends and FoesSociety for Promoting Christian Knowledge, 1899 - Всего страниц: 265 |
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abrine action aërial amongst animal anthrax bacilli anti-toxin anti-venomous serum appearance artificial attack bacilli bacteria Bacteriology blood body broth calcium citrate Calmette capable chemical cholera Cloth boards cobra colonies colour containing cubic centimetre cultivation destroyed diphtheria dish dose effect elaborated erysipelas experiments exposed exposure fatal fever flasks forms Frankland gelatine glyceric acid growth guinea-pigs immunity important inch injection inoculated investigations Kitasato known large number latter lethal leucocytes light liquid material Metchnikoff method micro-organisms microbes micrococci microscope minute molecules nitric acid nitrification nitrogen numbers found observed obtained ordinary organisms particular Pasteur Pasteur Institute peroxide of hydrogen plague plug poison possessed present produced properties protected pure cultures quantity rabbits recently remarkable rendered Roux soil spirilla spores square foot sterile substance sunshine surface temperature tetanus tion toxic toxin tube typhoid typhoid fever venom virulent virus volume of air whilst yeast Yersin zymotic disease
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Стр. 113 - Lister, and others. It will be of interest to examine a little more in detail how this disease, which may be taken as typical of zymotic diseases, is communicable from animal to animal. If the blood taken from any part of an animal just dead of anthrax be microscopically examined, it will be found to be teeming with these bacillar forms. Now, if the. smallest quantity of such blood is introduced into the tissues of another animal capable...
Стр. 106 - I na pure cultivation of a particular species of micro-organism, however, we must not expect such rigid uniformity of behaviour from each of the individual organisms making up such a cultivation, for there may be and frequently are great differences amongst them; in fact, each member of such a pure culture is endowed with a more or less marked individuality of its own, and these possible variations have to be taken into consideration by those who wish to turn their energies to account. In fact, experimenting...
Стр. 14 - The rapid motion of the countless swarms of individuals following their sinuous paths across the field of the microscope in all directions and in the three dimensions of space, much after the fashion of a cloud of midges playing in the sunshine, produces an irresistible impression upon the observer that each individual microbe is assisting in and conscientiously performing its part in a highly complex and thoroughly organized polonaise conducted at express speed.
Стр. 111 - ... amongst animals high and low, and threatening mankind with the most murderous plagues and epidemics. PATHOGENIC MICRO-ORGANISMS. Those micro-organisms which are capable of producing disease are generally known as pathogenic ones, whilst the diseases to which they give rise are termed zymotic diseases, in consequence of their course presenting more or less resemblance to a process of fermentation. Thus the manner in which infectious diseases are communicated, the continuous propagation of the...
Стр. 119 - But undoubtedly the greatest and most remarkable piece of work which has ever been accomplished in connecting disease with the life of micro-organisms, is the proof which has been furnished by Koch of the exciting cause of tuberculosis, one of the most familiar forms of which — pulmonary consumption — is the commonest disease in the world, and in this country the greatest enemy to human life, destroying, as it does, about one-fifth of our population generally in the best and most active years...
Стр. 114 - We thus see that tho disease is accompanied by the enormous multiplication of the micro-organism within the system of the victim, and that the disease may be indefinitely communicated from one animal to another. But we may also cause this bacillus to grow and multiply abundantly outside the animal system altogether, or, as we term it, 'cultivate the organism in an artificial medium.
Стр. 59 - ... to regard the number of colonies as representing the number of micro-organisms. These colonies have often very beautiful and characteristic appearances, " and it is exceedingly remarkable how constant and distinct for one and the same organism these appearances are. In many cases they give rise to magnificent patches of colour — deep orange, chrome yellow, brown, various shades of red, green, black, &c. Often under a low magnifying power they are seen to spread over the surface of the gelatine,...