The effect of metritis and subclinical hypocalcemia on uterine involution in dairy cows evaluated by sonomicrometry
Autor: | Marion Piechotta, Philipp Benz, Karoline Krach, Martina Hoedemaker, Heinrich Bollwein, Kathrin Herzog, Lars Krueger, M. Heppelmann |
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Přispěvatelé: | University of Zurich, Heppelmann, Maike |
Rok vydání: | 2015 |
Předmět: |
medicine.medical_specialty
Lochia Cattle Diseases Ice calving Animal science Pregnancy Internal medicine Animals Medicine Metritis Ultrasonography Subclinical infection 630 Agriculture Hypocalcemia business.industry Uterine Involution Uterus Myometrium food and beverages Puerperium Uterine horns medicine.disease 10187 Department of Farm Animals Pregnancy Complications Sonography Sonomicrometry Endocrinology 570 Life sciences biology Cattle Female Original Article Calcium Animal Science and Zoology 1103 Animal Science and Zoology Endometritis business |
Zdroj: | The Journal of Reproduction and Development |
ISSN: | 1348-4400 0916-8818 |
Popis: | The objective of this study was to examine the effects of metritis and subclinical hypocalcemia on reduction of uterine size in dairy cows using ultrasonography and sonomicrometry. Four piezoelectric crystals were implanted via laparotomy into the myometrium of the pregnant uterine horn of 12 pluriparous Holstein Friesian cows 3 weeks before the calculated calving date. Sonometric measurements were conducted daily from 2 days before parturition (= Day 0) until Day 14 after calving and then every other day until Day 28. Distances between adjacent crystals were expressed in relation to reference values obtained before calving. The diameter of the formerly pregnant uterine horn was measured using transrectal B-Mode sonography starting on Day 10. Cows were retrospectively divided into the following groups: cows without metritis (M–; n = 7), cows with metritis (M+; n = 5), cows with normocalcemia (SH–; Ca > 2.0 mmol/l on Days 1 to 3; n = 5) and cows with subclinical hypocalcemia (SH+; Ca < 2.0 mmol/l in at least one sample between Days 1 and 3; n = 7). Metritis did not affect (P > 0.05) sonometric measurements, but the diameter of the formerly pregnant horn was larger (P ≤ 0.05) between Days 15 and 21 in M+ cows than in M‒ cows. Reduction in uterine length in hypocalcemic cows was delayed (P ≤ 0.05) between Days 8 and 21 compared with normocalcemic cows, but the uterine horn diameter was not related to calcium status. In conclusion, both diseases affected reduction of uterine size until Day 28. Cows with metritis had a larger uterine diameter, possibly attributable to accumulation of lochia, and cows with subclinical hypocalcemia had delayed reduction of uterine length, presumably related to reduction of myometrial contractility. |
Databáze: | OpenAIRE |
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