A magzatburok-visszamaradás és a méhgyulladások hatása egyes szaporodási mutatókra, és az általuk okozott gazdasági veszteség hazai nagy létszámú tejelő tehenészetekben

Abstract

SUMMARY Background: The management of the transition period is of utmost importance for profitable dairy production, because the risk of diseases with potentially large economic effect is high. Objectives: The aim of this study was to quantify the effect of postpartum uterine diseases on the major reproductive parameters, and to estimate the resulting economic loss. Materials and Methods: The data of 3,660 calving events that occurred in 2016 and 2017 on five large-scale Hungarian Holstein-Friesian farms were analysed. Information regarding uterine treatments, retained placenta and inflammatory uterine diseases were gathered. The major reproductive parameters (i.e. calving to conception interval – CCI, services per conception – SPC, and first service conception risk – CR1) were calculated based on cow-level data. Statistical analyses were performed by using linear and logistic regression, and Dunnett-test. Losses due to open days, excess semen use and drug cost were taken into account in the economic calculations (1 EUR = 320 HUF). Results and Discussion: Uterine treatments were performed after 42.68% of the calvings, of which 13.28% were done due to retained placenta, and 29,40% due to uterine inflammation. Uterine treatments and retained placenta were more likely in multiparous cows (odds ratio: 1.22 and 2.05, p = 0.0098 and p < 0.0001, respectively). Retained placenta and uterine inflammations increased CCI by 2.7 and 28.3 days, SPC by 0.9 and 2.2, and reduced CR1 by 4.9 and 4.0 percentage points, respectively. The economic loss due to retained placenta amounted to 38.8 EUR per case, of which treatment cost had the largest share (46.4%). Uterine inflammations caused 122.8 EUR loss per case, with increased number of days open responsible for 57.6% of this loss.