Effects of intrauterine infusion of povidone-iodine on endometrial cytology and bacteriology in dairy cows with clinical endometritis

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  • MIDO Shogo
    Graduate School of Medicine and Veterinary Medicine, University of Miyazaki, Kihara 5200, Kiyotake, Miyazaki 889–1692, Japan Laboratory of Theriogenology, Department of Veterinary Sciences, Faculty of Agriculture, University of Miyazaki, Gakuen-kibanadai Nishi 1–1, Miyazaki 889–2192, Japan
  • MURATA Nozomu
    Laboratory of Theriogenology, Department of Veterinary Sciences, Faculty of Agriculture, University of Miyazaki, Gakuen-kibanadai Nishi 1–1, Miyazaki 889–2192, Japan
  • RAWY Mohamed Sadawy
    Laboratory of Theriogenology, Department of Veterinary Sciences, Faculty of Agriculture, University of Miyazaki, Gakuen-kibanadai Nishi 1–1, Miyazaki 889–2192, Japan Department of Theriogenology, Faculty of Veterinary Medicine, Assiut University, 71526, Assiut, Egypt
  • KITAHARA Go
    Laboratory of Theriogenology, Department of Veterinary Sciences, Faculty of Agriculture, University of Miyazaki, Gakuen-kibanadai Nishi 1–1, Miyazaki 889–2192, Japan
  • OSAWA Takeshi
    Graduate School of Medicine and Veterinary Medicine, University of Miyazaki, Kihara 5200, Kiyotake, Miyazaki 889–1692, Japan Laboratory of Theriogenology, Department of Veterinary Sciences, Faculty of Agriculture, University of Miyazaki, Gakuen-kibanadai Nishi 1–1, Miyazaki 889–2192, Japan

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Endometritis is one of the major diseases causing infertility in the cow. Intrauterine infusion of povidone-iodine (PVP-I) is a common treatment. However, the optimal concentration of PVP-I for treating endometritis effectively remains unknown. We tested concentrations of 2.0% or 0.5% PVP-I for treating clinical endometritis in dairy cattle. In Experiment 1, bacteria isolated from the uterus were incubated with either 2.0% or 0.5% PVP-I, and the numbers of bacterial colonies were counted. In Experiment 2, 18 cows with clinical endometritis were treated with either 2.0% or 0.5% PVP-I (n=9 in each group). Cytology samples and bacteria were collected using a cytobrush on weeks 0 (W0), 1 (W1) and 2 (W2) after treatment. Subsequent reproductive performance was compared between the two groups. In Experiment 1, both concentrations had a similar antiseptic outcome. In Experiment 2, the percentage of polymorphonuclear neutrophils (PMN%) in the endometrial epithelium at W2 in the 2.0% group was significantly lower (P<0.05) than in the 0.5% group, although the PMN% decreased significantly from W0 to W2 (P<0.01) in both groups. Decreases in bacterial infection rates from W0 to W2 were similar in both groups. The first service conception rate was higher, numbers of services per conception were fewer, and time to conception was shorter in the 2.0% group than in the 0.5% group. Thus, an intrauterine infusion of 2.0% PVP-I was better than 0.5% in treating clinical endometritis in these dairy cattle.

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