Monitoring of recessive defects associated with low reproductive performance in dairy cattle in Uruguay.

Background: Most dairy cattle breeds originate show an average generational inbreeding rate of 1%, which favors the occurrence of recessive defects associated with low reproductive performance.

Aim: The objective of this study was to monitor recessive defects associated with low reproductive performance in dairy cattle.

Methods: To monitor bulls carrying the Holstein Friesian haplotype (HH) 1, HH3, and HH4 haplotypes, we analyzed the records of 3,028 national and imported Holstein Friesian bulls from the 2021 updated sires' catalog published by "Evaluaciones Genéticas Lecheras"; and to determine the presence of these mentioned haplotypes, as well as Jersey haplotype (JH) 1 and complex vertebral malformation (CVM), were genotype with the GeneTitan 2,500 single nucleotide polymorphism (SNP) bovine chip, estimate their frequencies and evaluate their impact on the fertility of 100 Holstein Friesian cows and 70 Holstein Friesian-Jersey crosses belonging to an experimental dairy.

Pancreatico-jejunal anastomosis with invaginating jenunal "J"-loop. Preliminary report of a new technique.

Introduction: The pancreatic anastomosis is the most demanding step after pancreaticoduodenectomy (PD) and the pancreatic fistula (PF) is the most dreaded complication. Many techniques have been investigated to assess the best way to deal with the pancreatic stump after PD and none of these has shown to be superior in terms of statistically significant reduction of PF rate. We report the preliminary experience of a new technique of pancreaticojejunostomy (PJ).