A text-book of surgical principles and surgical diseases of the face, mouth, and jaws : for dental students / by H. Horace Grant.

  • Grant, H. Horace (Henry Horace), 1853-1921.
Date:
1902
Catalogue details

Licence: Public Domain Mark

Credit: A text-book of surgical principles and surgical diseases of the face, mouth, and jaws : for dental students / by H. Horace Grant. Source: Wellcome Collection.

Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.

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    tions, as the pus-producing, QdW^^ pyogenic. Some pro- duce special disease, as the micrococcus of pneumonia, term&di p7teiimocGCC2is ; or that of gonorrhea, termed^cw^- cocciis. Some produce decomposition, and are termed saprogenic germs. When micrococci in process of development are arranged in pairs, they are termed diplococci; when in clusters, like a bunch of grapes, staphylococci; and when in rows, like a chain, streptococci. Bacteria require favorable conditions for development, and though they grow best in the human body, under certain favorable conditions and special precautions they may be cultivated in an artificial medium of gelatin. The cocci multiply by direct division or fission, and with such rapidity that, in the space of twenty-four hours and under favorable conditions, one coccus may multiply to 15,000,000 or more. The bacilli multiply more slowly by a spore or bud- ding process; also by transverse division. As will be seen later, the moisture and the temperature of the body are most favorable for this growth. In the presence of colonies of saprogenic bacteria, in decomposing tissues, there is developed a poisonous alka- loid called pto7nain. Ptomains are not a secretion from bacteria, nor has it been proved that they emanate from them. They develop in the presence of bacteria, and thus are formed some of the so-called toxins of septic infection. Such poisonous germs develop in decomposing and im- properly cooked food, and cause severe, and sometimes fatal, symptoms. For example, the so-called tyrotoxicon in ice-cream and spoiled milk, and the ptomains in chicken salad, etc. These toxins are the causative agents of sapremia, the blood-poisoning due to retained after-birth in labor and abortion, and to sloughs and gangrene. Forms of the toxins of pathogenic bacteria, rendered less virulent by attenuation, constitute the antitoxin serums used to