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Book Contents

Histopathology and Cytology of
Poultry Diseases
By Ivan Dinev, DVM, PhD


STREPTOCOCCOSIS

Fig. 1. Valve thromboendocarditis.
Massive thrombotic masses (Tr) coating
the mitral valve in the left heart
side of a duck. It is generally associated
with Streptococcus zooepidemicus.
H/E, Bar = 40 µm.

Fig. 1. Valve thromboendocarditis. Massive thrombotic masses (Tr) coating the mitral valve in the left heart side of a duck. It is generally associated with Streptococcus zooepidemicus. H/E, Bar = 40 µm.

 
Fig. 2. Streptococcosis, duck. A mixed
wall thrombus (Tr) partially occluding
the left atrioventricular opening.
H/E, Bar = 50 µm.

Fig. 2. Streptococcosis, duck. A mixed wall thrombus (Tr) partially occluding the left atrioventricular opening. H/E, Bar = 50 µm.

 
Fig. 3. Myocardial infarction (I) as a
result of thromboemboly. Focal degenerative
necrobiotic lesions and
beginning of organization, appearance
of macrophages. H/E, Bar = 25
µm.

Fig. 3. Myocardial infarction (I) as a result of thromboemboly. Focal degenerative necrobiotic lesions and beginning of organization, appearance of macrophages. H/E, Bar = 25 µm.

 
Fig. 4. Widespread anaemic infarct
(I) in the spleen of a duck. A peripherally
reactive marginal zone of
hyperaemia (h), necrotic heterophils
and early fibroblastosis (f). The lesion
is clearly delineated by the adjacent
healthy parenchyma and is generally
resulting from a portal venous thrombosis.
H/E, Bar = 100 µm.

Fig. 4. Widespread anaemic infarct (I) in the spleen of a duck. A peripherally reactive marginal zone of hyperaemia (h), necrotic heterophils and early fibroblastosis (f). The lesion is clearly delineated by the adjacent healthy parenchyma and is generally resulting from a portal venous thrombosis. H/E, Bar = 100 µm.

 
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