Epizootic Bovine Abortion (EBA) Lecture Notes

Vocabulary flashcards covering the etiology, vectors, clinical signs, and prevention of Epizootic Bovine Abortion (EBA).

Epizootic bovine abortion (EBA)

Also known as foothill abortion, a disease seen in cows (mostly heifers) in the western U. S. characterized by abortion storms in the last trimester (60%)

Pajaroellobacter Abortibovis

The bacterial etiologic agent responsible for causing Epizootic bovine abortion (EBA).

Ornithodoros Coriaceus

A species of soft argasid tick, also known as the Pajarello tick, which acts as the vector for EBA.

Pajarello tick

The common name for $Ornithodoros\,coriaceus$, the vector that transmits the bacteria causing EBA.

Endemic regions for EBA

Geographic areas including the foothills around Sacramento/San Joaquin Valley and the eastern Sierra Nevadas in the western U.S.

Last trimester abortion storms

A classic clinical presentation of EBA where abortion rates can reach up to $60\%$, involving weakened or dead calves.

Fetal Lymphadenopathy

A diagnostic sign in a fetus aborted due to EBA characterized by enlarged lymph nodes.

Fetal Hepatosplenomegaly

An enlargement of the liver and spleen found in fetuses aborted due to EBA.

Granulomatous inflammation

A pathological finding in multiple organs of a fetus aborted at approximately $7.5$ months due to EBA.

Fetal IgG

An immunological marker that shows an increase in calves aborted due to Epizootic bovine abortion.

EBA Live vaccine

A vaccine licensed for use in $2020$ that is extensively used in cow-calf operations in endemic regions; it must be administered to open cows or heifers by a veterinarian.

Petechiae

Small red or purple spots found on the aborted fetus as a diagnostic sign of EBA.