This article presents the experience of rehabilitating two farms with initial infection with the bovine leukemia virus of 17.72% and 33.48%. A scheme for improving the health of a farm using the method of serological and hematological research, with the isolation of sero-positive animals and the subsequent elimination of animals with hematological leukemia, is described. This also shows the prevalence and incidence of oncornavirus infection in an uncontrolled epizootic process.

Salmonella infections pose significant health risks globally, particularly in developing regions. Vaccination remains a crucial strategy in controlling these infections. This study investigates the efficacy of a bivalent Salmonella vaccine designed to enhance immunity and provide broader protection against Salmonella serotypes.

To evaluate the immunological response and protective efficacy of the bivalent Salmonella vaccine in a controlled study setting. A total of 200 participants were recruited and divided into two groups: a vaccinated group receiving the bivalent Salmonella vaccine and a control group receiving a placebo. Immune responses were assessed through serological tests measuring antibody levels, and clinical protection was evaluated by monitoring the incidence of Salmonella infections over a 12-month period. Additionally, adverse events and vaccine safety were monitored.

Preliminary results indicate a significant increase in antibody titers in the vaccinated group compared to the control group. The incidence of Salmonella infections was notably lower among vaccinated individuals, suggesting enhanced protection. Safety analysis revealed that the vaccine was well-tolerated with minimal adverse effects reported. The bivalent Salmonella vaccine demonstrated promising efficacy in boosting immune responses and providing protection against Salmonella infections. These findings support its potential as a valuable tool in public health strategies aimed at reducing Salmonella-related diseases. Further studies are recommended to confirm long-term efficacy and assess its impact in diverse populations.