الفهرس 
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Abstract
In this investigation, twenty four rabbits of both sexes, 3months old
collected from a farm in Sharkia for experimental infection with Listeria
monocytogenes, 80 rabbits infected with pasteurellosis and 20rabbit infected
with ear mange collected from different rabbit farms located in in Dakahlia
and Damietta province. All used to study clinical, postmortem findings and
histopathological lesions of these diseases with trials of rei solation and
identification of reisolated isolates.
The experimentally infected rabbits with Listeria monocytogenes via
intraperitoneal route showed clinical signs in the form of poor appetite,
depression, ruffled fur, diarrhea soiled hind quarter, respiratory signs, eye
affection followed by emaciation then deaths. Macroscopically, severe
congestion in liver, spleen, lungs, uterus, brain beside engorgement of
mesenteric blood vessels were noticed. Sometimes, retention of urine and
petechial and / or ecchymotic subcapsular hemorrhages in kidneys was also
detected two weeks PI. Also, some infected rabbits showed conjunctivitis in
addition to the presence of straw colored fluid in the abdominal cavity.
Microscopically, Brain showed perivascular lymphocytic cuffing in
Virchow robin space with focal lymphocytic aggregation in surrounding
tissue and congested blood vessels were predominant 15 days PI. Congestion
in meningeal blood vessels was also detected. Liver showed multiple areas
of necrotic changes in the hepatic parenchyma. Proliferative bile ductules in
portal area was also detected. Moreover, hyperplastic kuffers cells with
various degenerative changes was also noticed. Focal congestion in
sinusoidal blood vessels 7and 15daysPI was also detected. Lungs showed
focal thickeneing of some interalveolar septa by lymphocytes and some