Table 5
Histopathology findings of aborted foetal tissue where EEV was
suspected to be the primary cause of abortion.
Owner/area
Histology
06/05/2013
Animal
name
Mare A
Stud A
16/05/2013
Foal A
Stud A
Placenta: multifocal areas of placental necrosis
observed deep within the placental villi, close to the
stromal tissue; parts of the placental tissue displayed
autolysis; no fungal or bacterial elements were
observed; no inflammatory response
Diagnosis – multifocal necrotic placentitis
Kidney: advanced autolysis; early amorphous calcified
structures were visible in collecting tubules; severe bile
pigmentation was visible in cortical tubules.
Heart: mild vascular haemorrhage was observed in
some of the small arteries.
Lung: multifocal and septal haemorrhage; no necrosis,
inflammation, or viral inclusions were observed.
Spleen: congestion of the spleen; prominent
extramedullary haemopoiesis and subcapsular
haemorrhage was observed.
Liver: autolytic changes were visible within the liver.
Umbilicus: scattered areas of haemorrhage was
observed in the soft tissue.
Diagnosis – severe pulmonary haemorrhage
16/05/2013
Mare B
Stud B
16/05/2013
Foal B
Stud B
13/06/2013
Mare C
Stud A
Date
13/06/2013
Placenta: no degenerative or autolytic changes were
observed in the epithelial cells; no inflammation,
necrosis or microorganisms were observed.
Diagnosis – multifocal haemorrhage
Kidney: severe congestion and marked haemorrhage
was observed in the cortex; marked bile pigmentation
was observed in intact renal tubular epithelial cells.
Heart: mild congestion was observed in the cardiac
blood vessels.
Lung: changes included haemorrhage.
Spleen: severe congestion with multifocal areas of
haemorrhage was visible in the spleen tiss VS