Acute anaplasmosis reduces breeding soundness in experimentally-infected beef bulls

Authors

  • Anne C. Lovett Diagnostic Medicine/Pathobiology, Kansas State University, Manhattan, KS, 66506
  • K.E. Reif Diagnostic Medicine/Pathobiology, Kansas State University, Manhattan, KS, 66506
  • E.J. Reppert Clinical Sciences, Kansas State University, Manhattan, KS, 66506
  • J.R. Jaeger Animal Sciences & Industry, Kansas State University, Manhattan, KS, 66506
  • Q. Kang Statistics, Kansas State University, Manhattan, KS, 66506
  • M.R. Flowers Diagnostic Medicine/Pathobiology, Kansas State University, Manhattan, KS, 66506
  • N.P. Bickmeier Diagnostic Medicine/Pathobiology, Kansas State University, Manhattan, KS, 66506
  • T. Anantatat Diagnostic Medicine/Pathobiology, Kansas State University, Manhattan, KS, 66506

Keywords:

anaplasmosis, beef bulls, breeding soundness exam

Abstract

Bovine anaplasmosis is a source of significant economic and production loss to the cattle industry in the United States, costing a modest estimate of $300 million in losses annually. The causative agent of bovine anaplasmosis, Anaplasma marginale, places herd management and financial strains on cow-calf producers in the U.S., a majority of which exist in anaplasmosis-endemic areas. Bulls servicing these herds are considered most valuable for their ability to reproduce. Death or disease in bulls which impairs their reproductive ability has significant consequences for producers and their herds. Clinical anaplasmosis signs, such as hemolysis and fever, may reduce bull breeding soundness. The objective of this study was to evaluate changes in breeding soundness outcomes and clinical changes in beef bulls over the course of acute anaplasmosis, from prior to infection, throughout development of clinical disease, and upon recovery.

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Published

2021-10-09

Issue

Section

Research Summaries

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