. A manual of poisonous plants, chiefly of eastern North America, with brief notes on economic and medicinal plants, and numerous illustrations. Poisonous plants. A B Fig. 5. A. Aspergillus fumigatus showing coniliophore on right with sterigmata and spores attached on left. B. A. niger showing conidiophore, sterigmata, .and spores attached in chains. After Siebenmann. Pneumonomycosis is a not uncommon disease of domestic Aspergillosis animals caused chiefly by the mould, Aspergillus fumigatus, although the Aspergillus niger is also pathogenic for birds. This disease is most frequent in birds,
. A manual of poisonous plants, chiefly of eastern North America, with brief notes on economic and medicinal plants, and numerous illustrations. Poisonous plants. A B Fig. 5. A. Aspergillus fumigatus showing coniliophore on right with sterigmata and spores attached on left. B. A. niger showing conidiophore, sterigmata, .and spores attached in chains. After Siebenmann. Pneumonomycosis is a not uncommon disease of domestic Aspergillosis animals caused chiefly by the mould, Aspergillus fumigatus, although the Aspergillus niger is also pathogenic for birds. This disease is most frequent in birds, both domestic and wild, occasionally observed in horses and cattle, and rarely in man. Respiratory diseases and lowered vital- ity predispose. In all species the disease is characterized by purulent local inflammations in the lungs or other tissues, and a purulent and necrotic pseudo- membrane upon the bronchial, tracheal, and other mucous membranes upon which it grows. The appearance of the pulmonary lesions sometimes resembles tubercle, sometimes actinomycosis. Pneumonomycosis has been experimentally produced in birds (pigeons and geese) by compelling them to inhale aspergillus spores for a few minutes, after which they usually die of pneumonia in a few days. Rabbits have also been successfully inoculated by intravenous injection of spores. Etiology. In mammals the Aspergillus fumigatus and in birds the Asper- gillus fumigatus, niger and flavescens seem to be pathogenic species. Infection takes place most commonly by inhalation of the spores which often are suspended in the air, or by taking them in with the food. Intestinal infection has not been observed. The spores are widely distributed in nature and exist in vegetable matter and grain abundantly. They possess remarkable vitality and exhibit considerable resistance to destructive agencies. The patho- genic power of the mould does not depend upon any product which it elaborates but upon the reactions which result from its
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Keywords: ., book, bookcentury1900, bookdecade1910, booksubjectpoisonousplants
