Diseases of cattle, sheep, goats Diseases of cattle, sheep, goats and swine diseasesofcattle00mous Year: 1920 ACTINOMYCOSIS. 67 animals. Nevertheless, the persistence of the disease in certain byres would seem to support the view of direct infection. On the other hand, it is proved that the actinomyces is a parasite affecting vegetables, principally the graminaceae, and that domestic animals are most commonly infected through injuries caused by vege- table substances. This is suggested by the discovery of the debris of grain at the point where the lesions have originated. Inoculation is comm
Diseases of cattle, sheep, goats Diseases of cattle, sheep, goats and swine diseasesofcattle00mous Year: 1920 ACTINOMYCOSIS. 67 animals. Nevertheless, the persistence of the disease in certain byres would seem to support the view of direct infection. On the other hand, it is proved that the actinomyces is a parasite affecting vegetables, principally the graminaceae, and that domestic animals are most commonly infected through injuries caused by vege- table substances. This is suggested by the discovery of the debris of grain at the point where the lesions have originated. Inoculation is commonest in the mouth and on the surface of the '. Fig. 273.—Actinomycosis of uiaunuaiy gland (cow), showing growth invading lobules. (Figs. 272 and 273 are from blocks kindly supplied by Mr Gilruth, ). tongue, parts which are, so to speak, permanently excoriated. The shedding of the temporary molars favours such accidents, and this is why actinomycosis of the jaw is, relatively, so common. The incisor region may also be inoculated during the shedding of the milk teeth, but as the infected food comes more closely and for much longer periods in contact with the molars, it is easy to understand why actinomycosis is rarer in the incisor region. The conditions are less favourable for inoculation of the pharynx, because food does not remain in position there for more than a
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