id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-026005-f2khcjdy	López, Alfonso	Respiratory System, Mediastinum, and Pleurae	2017-02-17		.txt	text/plain	57323	2749	34	Microscopic examination of properly collected, stored, and processed samples may reveal many erythrocytes and siderophages in pulmonary hemorrhage or left-sided heart failure; inclusion bodies or syncytial cells in viral pneumonias; increased number of leukocytes in pulmonary inflammation; abundant mucus in asthma or equine recurrent airway obstruction (RAO); the presence of pulmonary pathogens, such as parasites, fungi, and bacteria; or tumor cells in cases of pulmonary neoplasia. The portal of entry for the respiratory form is typically aerogenous, and the disease is generally transient; thus the primary viral-induced lesions in the nasal mucosa and lungs are rarely seen at necropsy unless complicated by secondary bacterial rhinitis, pharyngitis, or bronchopneumonia. Laryngeal edema occurs in pigs with edema disease; in horses with purpura hemorrhagica; in cattle with acute interstitial pneumonia; in cats with systemic anaphylaxis; and in all species as a result of trauma, improper endotracheal tubing, inhalation of irritant gases (e.g., smoke), local inflammation, and animal species is classified as fibrinous, catarrhal, purulent, or granulomatous (Figs.	./cache/cord-026005-f2khcjdy.txt	./txt/cord-026005-f2khcjdy.txt