Sanitary program to reduce embryonic mortality associated with infectious diseases in cattle.

Amauri Alcindo Alfieri,Alais Maria Dall Agnol,Alice Fernandes Alfieri,Raquel Arruda Leme

doi:10.21451/1984-3143-ar2019-0073

Amauri Alcindo Alfieri, Alais Maria Dall Agnol + Show 2 more

Open Access

https://doi.org/10.21451/1984-3143-ar2019-0073

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Journal: Animal Reproduction	Publication Date: Jan 1, 2019
Citations: 5	License type: cc-by

Affiliation: Universidade Estadual de Londrina

Abstract

Among reproductive disorders in dairy and beef cattle worldwide, embryonic mortalities stand out as one of the most frequent. Because of the multifactorial etiology, the clinical and laboratory diagnoses of embryonic mortality causes in cattle are quite complex. Often, infectious causes may account for up to 50% of bovine embryonic mortality rates after 30 days of conception. This review will address the main causes of early and late embryonic mortality, with emphasis on infectious causes and, particularly, those more frequent in the Brazilian cattle herds. In addition, we will discuss ways of controlling and prophylaxis including those related to reproductive and sanitary management, with emphasis on immunoprophylaxis of the three most frequent reproductive infectious diseases in Brazilian dairy and beef cattle herds.

Highlights

In a recent past of Brazilian cattle breeding, and especially of beef cattle, the embryonic mortality rate was a reproductive parameter that was very little evaluated in the production systems
Hundreds of scientific articles published in peer-reviewed and indexed journals that are available in relevant scientific databases, including Web of Science, PubMed, CAB Abstracts, and others analyzed different variables regarding the vaccination of beef and dairy cattle to control reproductive infections, such as IBR and BVD
The analysis revealed a decrease in abortions of nearly 45% and a nearly 85% decrease in fetal infection rate in cattle vaccinated for BVDV compared with unvaccinated cohorts

Summary

Introduction

In a recent past of Brazilian cattle breeding, and especially of beef cattle, the embryonic mortality rate was a reproductive parameter that was very little evaluated in the production systems. Features of embryonic mortality, related infectious causes, epidemiological profile of infectious reproductive diseases, sanitary programs, vaccination, and biosecurity are addressed.

Results

Conclusion