The aims of this study were to determine the dynamics of seroconversion of bovine viral diarrhea (DVB) and neosporosis, as well as the presence of animals persistently infected (PI) with the DVB virus in cattle farms of two experimental stations of the Universidad Nacional del Centro del Peru: In total, 111 Brown Swiss cattle in the EEA El Mantaro and 39 Holstein cattle in the GA Yauris, both located in the central highlands, Junín Region, Peru were used. Three evaluations (August 2015, and February and August 2017) were performed to detect serum antibodies against vBVD and N. caninum, and DVB antigens, using ELISA tests. The average prevalence of DVB in the EEA El Mantaro was 73.5%, the seroconversion dynamics in the herd was increasing over time, and the prevalence of PI animals was 5.4%. For GA Yauris, the average prevalence of DVB was 16.67%, the seroconversion dynamics were stable ...

The association of gastrointestinal parasitism with body weight, haematocrit and the FAMACHA method was determined in Junín sheep (lambs and rams) from the Stud group of SAIS Túpac Amaru Ltda. No. 1, Junín Region, Peru. The study was carried out in two seasons: May (dry) and October (rainy). In total, 109 rams and 98 lambs were sampled in May and 89 rams and 85 lambs in October 2018. There was a negative correlation between the haematocrit and the transformed value of parasite load. All the animals were positive to gastrointestinal parasites, finding a higher parasite load in males in October and in May in females. In May there were more cases of animals resistant to parasitism than in October. The highest frequency of gastrointestinal parasites was Nematodirus (50%), followed by Trichostrongylus (25%) and Ostertagia (15%).

The aims of this study were to determine the dynamics of seroconversion of bovine viral diarrhea (DVB) and neosporosis, as well as the presence of animals persistently infected (PI) with the DVB virus in cattle farms of two experimental stations of the Universidad Nacional del Centro del Peru: In total, 111 Brown Swiss cattle in the EEA El Mantaro and 39 Holstein cattle in the GA Yauris, both located in the central highlands, Junín Region, Peru were used. Three evaluations (August 2015, and February and August 2017) were performed to detect serum antibodies against vBVD and N. caninum, and DVB antigens, using ELISA tests. The average prevalence of DVB in the EEA El Mantaro was 73.5%, the seroconversion dynamics in the herd was increasing over time, and the prevalence of PI animals was 5.4%. For GA Yauris, the average prevalence of DVB was 16.67%, the seroconversion dynamics were stable ...