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  • Title: Effect of intrauterine infusion of Escherichia coli endotoxin in postpartum pony mares.
    Author: Blanchard TL, Elmore RG, Kinden DA, Berg JN, Mollett TA, Garcia MC.
    Journal: Am J Vet Res; 1985 Oct; 46(10):2157-62. PubMed ID: 3904547.
    Abstract:
    Fifteen pony mares were assigned to 1 of 3 treatment groups after foaling: Group 1, 35 ml of sterile saline solution was infused into the uterine lumen within 24 hours after parturition (6 mares); group 2, 300 mg of Escherichia coli endotoxin was infused into the uterine lumen within 24 hours after parturition (6 mares); and group 3, 300 mg of E coli endotoxin was infused into the uterine lumen between 72 and 96 hours after parturition (3 mares). Rectal temperatures were taken at -1, -0.5, 0, 0.5, 1, 1.5, 2, 3, 4, and 5 hours after treatment. Venous blood samples were also taken at these times for routine WBC counts. Data were analyzed as a repeated measurement design with linear and quadratic orthogonal contrasts performed where significant time and interaction with time occurred. Pretreatment averages of total WBC and neutrophil counts were compared with their nadir posttreatment averages by a t test when treatment-by-time interaction was significant for the parameter. Rectal temperature (37.9 +/- 0.1 C) remained stable and did not vary among treatment groups after intrauterine infusions. In contrast, total WBC and neutrophil counts did vary among treatment groups across time. However, for treatment groups 1 and 3, neither blood total WBC count nor neutrophil count after intrauterine infusions was different from pretreatment observations. In group 2, total WBC count decreased (P less than 0.10) from a pretreatment average of 11.5 +/- 0.4 X 10(3) cells/mm3 to a nadir concentration of 10.0 +/- 0.6 X 10(3) cells/mm3 by 60 minutes after infusion of endotoxin into the uterus.(ABSTRACT TRUNCATED AT 250 WORDS)
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