The Lumleian lectures on some moot point in the pathology and clinical history of pneumonia : delivered before the Royal College of Physicians of London on May 30th and June 4th and 6th, 1912 / by Percy Kidd.
- Kidd, Percy
- Date:
- [1912]
Licence: In copyright
Credit: The Lumleian lectures on some moot point in the pathology and clinical history of pneumonia : delivered before the Royal College of Physicians of London on May 30th and June 4th and 6th, 1912 / by Percy Kidd. Source: Wellcome Collection.
Provider: This material has been provided by London School of Hygiene & Tropical Medicine Library & Archives Service. The original may be consulted at London School of Hygiene & Tropical Medicine Library & Archives Service.
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![frequently found in pneumonia, a short, capsulated, rod- shaped organism, since known as Friedlander's bacillus, or the Bacillus pneumonia;. The staining and cultural characters of Friedlander's bacillus and the pneumococcus are very different, the former microbe also being much less pathogenic to animals. It was subsequently shown that the pneumococcus is identical with the coccus of sputum septicemia, and also that it is a normal denizen of the throat in a considerable proportion of healthy persons. Frankel asserted the doctrine of the unity of pneumonia —that is to say, that all lobar pneumonia is due to the pneumococcus. This view has been widely adopted, in spite of the fact that Weichselbaum, as the result of an extensive series of observations, had come to a different conclusion, which he formulated in 1886. According to Weichselbaum [1], the virus of pneumonia is not a single one. Lobar pneumonia may be caused by various kinds of microbes, among which are Diplococcus pneumoniae, B. pneumoniae (Friedlander), Streptococcus pneumoniae, identical with S. pyogenes, and Staphylococcus pyogenes. The pneumococcus, or Diplococcus pneumoniae, is by far the commonest cause of acute primary pneumonia. But this micro-organism, like the other microbes alluded to, may also be found in secondary inflammations of the lung and in acute broncho-pneumonia. Results of Experimental Inoculations. From the first, all workers in the field of experimental inoculation with cultures of the diplococcus have agreed that in laboratory animals, such as the mouse and rabbit, the result is a rapidly fatal septicaemia in which diplococci are found in the blood and organs generally. When considerable doses of the diplococcus are injected, and when virulent cultures are employed, the animal dies in three days or less from septicaemia without any local lesion beyond swelling of the spleen. With smaller closes and with less virulent cultures, in-](https://iiif.wellcomecollection.org/image/b21353487_0009.jp2/full/800%2C/0/default.jpg)
