There are 35 species of fungus which can cause abortion but in cow
60 % cause is Aspergillus fumigatus then Absidia Ramosa, and
Corymliferia. These are common.
Occurrence is by respiratory tract and ingestion of contaminated
feed. The ulcerative lesions in the stomach will develop; also in
abomasum. Within next 20-80 days the abortion may occur. Organism is
present in placenta, fetus, and amniotic fluid.
Lesions:
Placentits, yellowish thick material in inter cotyledonary space,
swelling of cotyledon. There are diffused white-grey hair patches at
neck region, thoracic cavity and on thigh region of fetus.
Source:
Source is mouldy hay, rice straw, wheat straw, and poor quality
silage specially where storage conditions are not favorable i.e.
more humidity.
Contributory Factors:
-
Improper housing conditions
-
More number of animals in less area. One infected will lead to
infection of all animals.
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Contamination of food
-
Rainy season
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Abortion occurs at 3-7 month of pregnancy.
Control:
Diagnosis:
Aborted fetus and placenta is send to lab for the isolation of
microorganism
The
food analysis is important for fungal spores and toxins.
Treatment:
Separate the infected animals. Give progesterone.
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