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.
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 is mouldy hay, rice straw, wheat straw, and poor quality
silage specially where storage conditions are not favorable i.e.
Improper housing conditions
More number of animals in less area. One infected will lead to
infection of all animals.
Contamination of food
Abortion occurs at 3-7 month of pregnancy.
Aborted fetus and placenta is send to lab for the isolation of
food analysis is important for fungal spores and toxins.
Separate the infected animals. Give progesterone.