Disease in captive wild mammals and birds : $b incidence, description, comparisonFox, Herbert
Science
Disease in captive wild mammals and birds : $b incidence, description, comparison
Fox, Herbert
Veterinary medicine
Coat only fair, body emaciated. Pale muscles, fat scanty. Respiratory
tract normal throughout save for slight emphysema. The Pericardium
showed no fluid or adhesions. Epicardium glistening and slightly
thickened. Heart pale in color. Abdomen shows no fluid or adhesions.
Liver slightly decreased in bulk, smooth surface and sharp edges,
hard, and rusty brown. Gall-bladder distended, contained green fluid.
Spleen firm and normal in size. Capsule smooth, shape normal. Section
surface, dark reddish brown, trabeculæ distinctly visible. Kidney,
normal in shape, capsule smooth, strips easily, smooth surface,
glistening, pinkish gray, consistency hard. Section surface, poor
demarkation between cortex and medulla. R. Adrenal, thick orange
yellow cortex, solid small brown medulla. Mouth and teeth normal.
Stomach distended, contains gas and small quantity yellowish mucus.
Mucosa everywhere normal. Postmortem blood examined, stained by
Romanowsky, but red cells were disintegrated possibly by laking so
examination is not satisfactory. Histological Sections: Heart shows
normal epicardium quite free of fat. Myocardium peculiar in that
fibres immediately under epicardium show marked broadening in a very
narrow rather sharply indicated zone where nuclei are extremely large
although not especially chromatic. Transverse markings here easily,
although faintly recognized, have very indefinite borders, their
longitudinal fibrillæ being ranged in form of a coarse reticulum. This
comes about from frequent and extensive lateral anastomoses with
fellow fibres giving appearance of a syncytium. In deeper parts,
fibres are of more normal size but nuclei are still large and fibres,
now cut in transverse section do not appear to anastomose so freely;
there appears to be a slight excess of fibrous tissue in their deeper
parts. Arteries quite normal. Atrophy with regeneration.
Liver.—Capsule and interstitial parts on whole normal. Perilobular
fibrous tissues largely missing, but where remaining show an
overgrowth occurring in peculiar zonal arrangement and of old adult
almost hyaline type. Its fibres are often arranged strikingly in
whorls. Bile ducts, arteries and veins quite normal. Parenchymal cells
of normal size, finely granular, prominent normal nuclei and contain
small quantities of finely granular, golden brown pigment not really
as abundant as commonly seen in severe anemias. Blood capillaries
narrow, contain small quantities R.B.C., and Kupffer’s cells very
frequently contain fine granules like those of parenchymal cells but
of a greener tint. In a few isolated areas parenchymal cells
distinctly more swollen than others and many show disintegration of
nucleus. Hemosiderin pigmentation. Perilobular fibrosis. Slight local
cloudy swelling.
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