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Instrumentation of Near-term Fetal Sheep for Multivariate Chronic Non-anesthetized Recordings

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Antimicrobial prophylaxis post-amniocentesis procedures in cattle: A randomized controlled equivalence study.

V A Absalón-Medina^1,2, R V Sala¹, R Bond¹

¹STgenetics®, South Charleston 45368 OH, United States of America.

Veterinary and Animal Science

|January 10, 2022

Summary

Antimicrobial use did not significantly reduce pregnancy loss after amniocentesis in cattle. This routine procedure showed similar spontaneous abortion rates to untreated cattle, suggesting antimicrobials may not be necessary.

Keywords:

Amniocentesis Antimicrobial prophylaxis Bovine

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Area of Science:

Veterinary Medicine
Reproductive Biology
Genetics

Background:

Amniocentesis is a common diagnostic procedure in cattle for genetic trait assessment.
Bacterial contamination during amniocentesis poses a risk of spontaneous pregnancy loss.
Accelerating genetic gain in cattle is crucial for the industry.

Purpose of the Study:

To evaluate the efficacy of antimicrobial prophylaxis in preventing spontaneous abortions post-amniocentesis in cattle.
To compare pregnancy loss rates between treated and untreated cattle undergoing amniocentesis.

Main Methods:

A randomized controlled equivalence study was conducted.
One group received antimicrobial prophylaxis, while the control group did not.
Pregnancy loss incidence was monitored post-amniocentesis.

Main Results:

No significant difference in spontaneous abortion rates was observed between the antimicrobial-treated group (0% loss) and the untreated group (1.54% loss).
The spontaneous abortion rate in the amniocentesis group was comparable to the general population of pregnant heifers not undergoing the procedure (1.59%).
Statistical analysis (Fisher's exact test, P=0.49) indicated no significant treatment effect.

Conclusions:

Amniocentesis in cattle does not significantly increase the risk of spontaneous pregnancy loss compared to untreated individuals.
Prophylactic antimicrobial use appears unnecessary for cattle undergoing amniocentesis.
The procedure's inherent risks are minimal and comparable to natural pregnancy loss rates.