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Updated: May 10, 2026

The Examination of Peroxidase-Positive Leukocytes in Semen
Published on: January 19, 2024
Is semen polymorphonuclear leucocytes count a good predictor of male genital tract infection?
Lihang Chen1, Su Ling Yu, Hemashree Rajesh
1Department of Internal Medicine, John A. Burns School of Medicine, University of Hawaii, 1356 Lusitana Street, Honolulu, HI 96813, USA. lihang_chen@126.com
Introduction:
This study aims to evaluate whether an increased polymorphonuclear leucocyte (PMN) count in semen is a good predictor of male genital tract infection, which is detected by semen culture.
Methods:
A retrospective cross-sectional study examining the semen of 388 men was conducted at the in vitro fertilisation centre of a tertiary hospital. We compared the culture results of 109 men with increased semen PMN count against those of 279 men with normal semen PMN count.
Results:
There was no significant difference in the percentage of positive cultures between men with increased PMN count in their semen and those without PMN count elevation (original sensitivity 20.8%, specificity 70.3%; p = 0.1289). The overall percentage of positive semen cultures among all 388 patients was 18.6%.
Conclusion:
Based on the positive cultures of significant organisms in the semen of our cohort, an increased semen PMN count is not a good predictor of genital tract infection in men.
Insights
An elevated polymorphonuclear leucocyte (PMN) count in semen does not reliably predict male genital tract infections. Semen culture remains the definitive diagnostic method for identifying infections in men.
Area of Science:
- Reproductive Medicine
- Andrology
- Infectious Diseases
Background:
- Male genital tract infections can impact fertility.
- Polymorphonuclear leucocytes (PMNs) are indicators of inflammation.
- Semen analysis often includes PMN counts.
Purpose of the Study:
- To assess if increased semen polymorphonuclear leucocyte (PMN) counts predict genital tract infection detected by semen culture.
- To determine the diagnostic utility of PMN counts for male reproductive tract infections.
Main Methods:
- Retrospective cross-sectional study.
- Analysis of semen from 388 men at a tertiary hospital's in vitro fertilisation centre.
- Comparison of semen culture results between men with and without elevated PMN counts.
Main Results:
- No significant difference in positive semen culture rates between groups (p = 0.1289).
- Sensitivity and specificity of PMN count for predicting infection were 20.8% and 70.3%, respectively.
- Overall positive semen culture rate was 18.6%.
Conclusions:
- Increased semen PMN count is not a reliable predictor of male genital tract infection.
- Semen culture is essential for diagnosing significant infections.
- Current diagnostic criteria may need re-evaluation.
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