02928naa a2200301 a 450000100080000000500110000800800410001902400380006010000190009824501800011726000090029750001080030652018160041465000120223065000240224265300130226665300270227965300260230665300220233265300130235465300190236765300170238665300280240370000210243170000200245270000200247277301340249210602742021-01-27       2019    bl uuuu     u00u1 u    #d7 a10.1016/j.ijpara.2019.06.0052DOI1 aCOSTA, R.A. DA  aEvaluation of losses in carcasses of cattle naturally infected with Fasciola hepaticabeffects on weight by age range and on carcass quality parameters.h[electronic resource]  c2019  aArticle history: Received 30 December 2018/ Received in revised form 29 May 2019/ Accepted 3 June 2019.  aAbstract: Although fasciolosis is a relatively common disease, the productive and economic losses resulting from cattle with chronic fasciolosis are unclear. This paper aims to investigate the effect of fasciolosis on the parameters of carcass quality and discuss the hypothesis that the effects on weight differ among age ranges of cattle. For this, we analysed abattoir data of 30,151 bovines, from 928 farms, slaughtered in Uruguay in 2016, of which 33.9% (95% confidence interval (CI): 27.3?41.1%) had Fasciola hepatica (liver fluke). A mixed model was built to assess whether the effect of fasciolosis on weight differs depending on the age range, using the interaction term ?age*F. hepatica?. The effect on the carcass parameters was tested using a proportional logistic regression. The interaction of age and F. hepatica was statistically significant (P?<?0.001). Differences in carcass weights between infected and non-infected animals were observed mostly at younger ages (up to 30?months), with the highest difference observed in the 23?30?months age range (estimated marginal mean difference of 6.34?kg). Overall, the presence of F. hepatica was positively associated with poor conformations and lower fat scores of carcasses (P?<?0.001). The carcasses of cattle infected with F. hepatica had 0.16 times greater odds of having worse conformation scores than carcasses of cattle without F. hepatica (proportional odds ratio (POR)?=?1.16; 95% CI: 1.07?1.26). Similarly, carcasses of cattle with F. hepatica had 0.30 times (POR?=?1.30, 95% CI: 1.23?1.39) greater odds of having poorer fat scores than carcasses of cattle without F. hepatica. Therefore, infection with F. hepatica is associated with poorer carcass quality parameters and lower weights, and the effect on weight differs across age ranges.  aBOVINOS  aCALIDAD DE LA CARNE  aABATTOIR  aBOVINE CARCASS QUALITY  aCALIDAD DE LA CARCASA  aFASCIOLA HEPATICA  aMATADERO  aMEDELOS MIXTOS  aMIXED MODELS  aPLATAFORMA SALUD ANIMAL1 aCORBELLINI, L.G.1 aCASTRO-JANER E.1 aRIET-CORREA, F.  tInternational Journal for Parasitology,Volume 49, Issue 11, October 2019, Pages 867-872. Doi:https://10.1016/j.ijpara.2019.06.005