Structural and biophysical characterization of the major proteins from the seminal plasma of Dorper rams.

Pregnancy rates using frozen semen from rams are higher than for horses. One of the factors that positively influences this effect is the composition of low-molecular-weight proteins from seminal plasma, since the amounts of these proteins are much lower in horses. The aim of this work was to purify the major protein components from ram seminal plasma for structural and biophysical characterization.

Purification, structural and biophysical characterisation of the major seminal plasma protein from Texel rams.

Spermadhesins are a group of low molecular weight proteins present in seminal plasma. In Texel rams, they represent more than 70% of the seminal plasma proteins. Although their functions have not yet been fully clarified, there is much discussion about the role of these proteins in maintaining sperm viability during and after the semen freezing process.

Occurrences of Oestrus ovis parasitism in necropsied sheep in the Umuarama microregion, Paraná, Brazil.

Between January 2007 and September 2013, 71 sheep belonging to 12 farms in the Umuarama microregion, State of Paraná, were evaluated regarding presence of Oestrus ovis larvae, during necropsies. The farms from which these animals originated were visited and the owners and employees were interviewed. Occurrences of O.

Acaricidal effects of fluazuron (2.5 mg/kg) and a combination of fluazuron (1.6 mg/kg) + ivermectin (0.63 mg/kg), administered at different routes, against Rhipicephalus (Boophilus) microplus parasitizing cattle.

The present study aimed to evaluate the acaricidal efficacy of fluazuron (2.5 mg/kg), administered as a pour-on, in comparison to an injectable formulation containing fluazuron (1.6 mg/kg) + ivermectin (0.