Use of reagent test strips for diagnosis of endometritis in dairy cows

S. H. Cheong, D. V. Nydam, K. N. Galvão, B. M. Crosier, A. Ricci, L. S. Caixeta, R. B. Sper, M. Fraga, R. O. Gilbert

Research output: Contribution to journalArticlepeer-review

34 Scopus citations

Abstract

The use of leukocyte esterase (LE), protein, and pH tests were evaluated on widely available urinary test strips (Multistix 10 SG; Bayer Corporation, Elkart, IN, USA) on uterine lavage samples as a potential cow-side test for the diagnosis of cytologic endometritis. Uterine lavage samples of 563 lactating Holstein cows between 40 and 60 days postpartum from 28 herds were evaluated. Endometrial cytology was used as the reference for endometritis, with a cutoff point of ≥10% neutrophils. All three (LE, protein, and pH) were increased in cows with cytologic endometritis and the associations were highly significant. Optimal cutoff points determined by receiver operating characteristic analysis for LE, protein, and pH were ≥++, ≥300 mg/dL, and ≥7.0, respectively. Combining the results for LE and pH improved the performance of the test strip, but this resulted in a group of cows (20.6% of cows) which were approximately equally likely (46% with endometritis and 54% without endometritis) to have cytologic endometritis or not, and therefore could not be accurately classified. The direct relationship between reagent strip test and reproductive performance was also evaluated. Reproductive impairment due to endometritis was restricted to multiparous cows; significantly decreased reproductive performance was observed for multiparous cows with lavage fluid LE ≥+++ (154 vs. 115 median days not-pregnant), as well as cows with pH ≥ 7.0 (150.5 vs. 111.5 median days not-pregnant), but not in cows with high protein, even at the highest cutoff point. In conclusion, reagent strip test results were strongly associated with cytologic endometritis and reproductive impairment; however, in comparison with conventional cytology, the performance of reagent strip as an alternative test was relatively poor and may require further refinement.

Original languageEnglish (US)
Pages (from-to)858-864
Number of pages7
JournalTheriogenology
Volume77
Issue number5
DOIs
StatePublished - Mar 15 2012

Bibliographical note

Funding Information:
The authors thank Drs. Michael Capel, Mark Thomas, John Rath, Thomas Gill, and Robert Ceglowski for their contributions in recruiting and maintaining contacts with the study herds, Thomas Linden for technical help in sampling and sample processing, and the herdsmen and farm owners who generously allowed access to their animals and records for this study. This project was funded, in part, by the Cornell University Agricultural Experiment Station federal formula funds (Animal Health) Project Number NYC-480861 received from the Cooperative State Research, Education and Extension Service , US Department of Agriculture. Any opinions, findings, conclusions, or recommendations expressed in the publication are those of the authors and do not necessarily reflect the view of the USDA.

Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.

Keywords

  • Dairy cows
  • Endometritis
  • Reagent strip
  • Uterine disease
  • Uterus

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