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Bovine granular vulvitis associated with ureaplasma infection
Summary
Ureaplasma infection causes granular vulvitis in dairy cows, impacting fertility. Tetracycline treatment improved conception rates in acutely affected herds, offering a potential solution for this bovine reproductive issue.
Area of Science:
- Veterinary Medicine
- Bovine Health
- Infectious Diseases
Background:
- Granular vulvitis syndrome, linked to Ureaplasma infection, was identified in Ontario dairy cattle in 1972.
- The disease presents in acute and chronic forms, with distinct clinical signs including vulvar discharge and mucosal inflammation.
Purpose of the Study:
- To describe the characteristics of granular vulvitis syndrome in dairy herds.
- To investigate the impact of the disease on herd fertility.
- To evaluate the efficacy of tetracycline treatment on conception rates.
Main Methods:
- Clinical observation of acute and chronic granular vulvitis in dairy cows.
- Fertility data analysis, including first service conception rates.
- Evaluation of intrauterine tetracycline infusions post-breeding.
Main Results:
- Acute granular vulvitis featured purulent discharge and hyperemia; chronic form lacked discharge but showed reduced inflammation.
- Seasonal variation in incidence was noted, with higher morbidity during winter housing (75%) versus summer (37%).
- First service conceptions decreased by 27% in acute cases and 13% in chronic cases; tetracycline improved rates in acute herds.
Conclusions:
- Ureaplasma-associated granular vulvitis significantly affects dairy herd fertility.
- Seasonal housing patterns influence disease incidence.
- Intrauterine tetracycline administration shows promise for improving fertility in affected herds.
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