The influence of heredity and contagion on the propagation of tuberculosis : and the prevention of injurious effects from consumption of the flesh and milk of tuberculous animals / by A. Lydtin, G. Fleming, and Van Hertsen.

  • Lydtin, A. (August), 1834-
Date:
[1883]
Catalogue details

Licence: Public Domain Mark

Credit: The influence of heredity and contagion on the propagation of tuberculosis : and the prevention of injurious effects from consumption of the flesh and milk of tuberculous animals / by A. Lydtin, G. Fleming, and Van Hertsen. Source: Wellcome Collection.

    27/188 (page 21)
    In addition to the nodosities on the serous membranes, and the nodular and caseous transformations met with in many of the lymphatic glands, pulmonary lesions are found in the majority of the animals affected with tubercular phthisis. These are in the form of nodules and nodosities, possessing similar characters to those already mentioned ; in the lung parenchyma they are observed to be in all their stages of evolution, from the haemor- rhagic points to the caseous and calcareous nodosity. Besides these connective-tissue vegetations, which may cause complete obsolence of the pulmonary lobules and acquire considerable dimensions, and are at the same time often permeated with centres of regressive transformation, there are other irregularly- formed centres of various dimensions, caseous in appearance, and situated in the pulmonary parenchyma, which do not present any other abnormal character. Sometimes the pleural nodules or nodosities of the costal or mediastinal pleura extend to the parietal or visceral pleurae, and bring about adhesions between the lungs and costal walls, or the mediastinal septum or pericardium. It may even happen that the pleural nodosities penetrate the pulmonary parenchyma, and the invasion may be so complete that it is impossible to distin- guish the pulmonary from the pleural nodosities. The conglomerated nodosities which form the caseous or mortar-like masses may, if they are situated beneath the pleura, penetrate the latter, throwing their contents into the pleural cavities, and give rise to a rapidly fatal Pleurisy, or to Pneumo- thorax. If the masses of nodosities are found in the vicinity of a bronchus, they may open into its cavity, and their contents be expelled in discharges from the mouth or nostrils. When these softened centres open into the pleural sac or the bronchi, there results the formation of abnormal cavities in the pulmonary parenchyma; these are the so-called vomica or caverns. The following is a very exact description of the necroscopic lesions met with in tuberculous animals; it is taken from the Dictionnaire de Medecine Veterinaire of Hurtrel d'Arboval (Paris, 1839. Vol. v., p. 35) :_ The ribs having been removed from the carcase of a cow sent to the knacker, the pleura was found to be entirely covered