Natalia G. Porta

Learn More
BACKGROUND Bovine leukemia virus (BLV) is worldwide distributed and highly endemic in Argentina. Among the strategies to prevent BLV dissemination, a control plan based on the selective segregation of animals according to their proviral load (PVL) is promising for our dairy productive system. The objective of this work was to study the relationship between(More)
Dairy farms are heavily infected with Bovine Leukemia Virus (BLV) in Argentina and many other countries, where a control strategy should be design based on the behavior of natural. We conducted a series of studies with the aim to better understand the epidemiology of BLV. Infected new born calves were present in 3 studied farms (8.3%-11%). Proviral load(More)
Bovine Leukemia Virus (BLV) is distributed worldwide and causes important economic losses on dairy farms. Currently, there are no effective vaccines or antivirals against BLV. Egg yolk antibodies (IgY) has many advantages over mammalian IgG. Despite the higher yields, they are non-invasively extracted from egg yolk, do not cross react against mammalian(More)
Previously, Multimer Detection System (MDS) detected scrapie infected lambs of 8 mo age at pre-clinical stage in comparison with the normal controls. Above lamb were born from scrapie infected parent sheep (VRQ/VRQ). Here, MDS was challenged twice blindly with scrapie sheep blood samples from pre-clinical stages. These sheep showed no symptoms and they died(More)
We explored the relationship between the level of bovine leukemia virus antibodies and provirus load during natural infection. For that purpose, a set of 50 blood and milk paired samples were analyzed for the presence of bovine leukemia virus provirus and antibodies. Additionally, provirus load and antibody titers were measured and the relationship between(More)
We think that the ingestion of milk with provirus or free virus particles could be important for BLV vertical transmission in calves. In order to explore this idea we conducted an epidemiological study in an experimental milking facility (8,0 Kg/animal/year). The herd was composed by 332 dairy cattle and their calves were fed using non-pasteurized milk from(More)
  • 1