. Diseases of domesticated birds. Poultry; Poultry; Birds. CHAPTER X ASPERGILLOSIS AND FAVUS ASPERGILLOSIS Synonyms. Pneumo-mycosis, brooder pneumonia. Characterization. Aspergillosis is a disease of the pulmonary region due to infection with fungi. It is characterized by the form- ation of an exudate, usually of a moldy appearance, on the mucous membrane of the air passages, principally the air sacs of the ab- dominal cavity. Etiology. The disease is almost invariably introduced by fungi of the genus Aspergillus, Aspergillus fumigatus being the most con- stant causative agent. Other members o
. Diseases of domesticated birds. Poultry; Poultry; Birds. CHAPTER X ASPERGILLOSIS AND FAVUS ASPERGILLOSIS Synonyms. Pneumo-mycosis, brooder pneumonia. Characterization. Aspergillosis is a disease of the pulmonary region due to infection with fungi. It is characterized by the form- ation of an exudate, usually of a moldy appearance, on the mucous membrane of the air passages, principally the air sacs of the ab- dominal cavity. Etiology. The disease is almost invariably introduced by fungi of the genus Aspergillus, Aspergillus fumigatus being the most con- stant causative agent. Other members of the aspergillus group have been identified in the morbid processes. These, however, are of slight significance as they have not been associated with the incidence of pulmonary mycosis to any great extent. Aspergillus fumigatus is widely distributed in nature and is often observed on vegetable matter of all kinds which has been exposed to dampness. Birds scratching among moldy grains or in moldy litter may inhale the spores. These find a favorable place for propagation on the mucosae of the bronchi, or of the air sacs. The fungus may be readily grown on potato, rye bread or plain agar which is acid in reac- tion. The most suitable temper- ature is between 35° and 40° C. The growth appears after 24 hours incubation as a whitish downy layer over the surface of the medium. This is composed of an interwoven mass of trans- parent mycelial threads which later give off branches capped by fruit heads. Each of the latter is composed of a mass of small rounded 111. Fig. 10. Aspergillus fumigatus. (Redrawn from Mohler and Buck- ley). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Ward, Archibald Robinson, 1875-; Gallagher, Bernard Alfred, 1880-1940, joint author. New York, The Macmillan Company
Size: 1591px × 1570px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectbirds, booksubjectpou
