10 research outputs found
Humoral immune response induced by a commercial vaccine against vesicular stomatitis virus (VSV) in pigs
ABSTRACT: The goal of this study was to determine the humoral immune response induced by a previously
tested bovine bivalent vaccine against the vesicular stomatitis virus in pigs. 30 female pigs were
immunized with the biological product and 20 more remained as controls. We measured neutralizing
antibody tittles against both serotypes of VSV, IN and NJ, in serum for all the pigs at day 0 (before
inoculation) and then at 82, 182, 330, 404 days post-vaccination. Re-vaccination was performed at
434 days and again a new serum sample was tested at day 599. All the female pigs showed a similar
average of background antibodies against both serotypes of VSV at day 0. At 82 days postvaccination
there was a 100-fold difference between the vaccinated and unvaccinated groups in
favor of the vaccinated pigs. The differences were statistically significant and remained the same
through the whole experiment. Following the antigenic boost there was a new peak of NT antibodies,
which was comparable to the one obtained 82 days after the first vaccination. The unvaccinated
pigs only showed background levels of NT antibodies that did not change significantly along the
experiment. The study shows that this is a safe and promising vaccine. This biological product
induces an important immune humoral response, with potential for protection against natural
VSV exposures. Future studies will show its capability to protect animals against viral challenge
and prevent infection of piglets.RESUMEN: Con el objetivo de determinar la respuesta inmune humoral en porcinos inducida por una vacuna
bovina comercial contra la estomatitis vesicular, se inmunizaron 30 cerdas comerciales y 20 más
fueron dejadas como control. A todas se les realizĂł mediciĂłn de los tĂtulos de anticuerpos utilizando
la prueba de seroneutralizaciĂłn para los serotipos Indiana (IN) y New Jersey (NJ), los dĂas 0, 82, 182,
330, 404 y 599 post-vacunaciĂłn; con revacunaciĂłn a los 434 dĂas. Tanto los animales vacunados como
los no vacunados exhibieron bajos tĂtulos de anticuerpos contra ambos serotipos antes de la vacunaciĂłn.
Sin embargo al dĂa 82 post-vacunaciĂłn se presentĂł un notable incremento en los tĂtulos de anticuerpos
en animales vacunados tanto para el serotipo IN como para el NJ, con promedios de 3.17 y 3.56
respectivamente. Para el dĂa 404 se observĂł un descenso en el tĂtulo de anticuerpos, los cuales
incrementan para el dĂa 599, por efecto de la revacunaciĂłn. Los animales control mantuvieron bajos
tĂtulos de anticuerpos durante todo el experimento. Este estudio muestra que hay una respuesta inmune
humoral con diferencias estadĂsticamente significativas entre las cerdas vacunadas y no vacunadas,
sin reacciones adversas atribuibles al biolĂłgico, en los animales inoculados
QUBIC: Exploring the Primordial Universe with the Q&U Bolometric Interferometer
In this paper, we describe QUBIC, an experiment that will observe the polarized microwave sky with a novel approach, which combines the sensitivity of state-of-the-art bolometric detectors with the systematic effects control typical of interferometers. QUBIC’s unique features are the so-called “self-calibration”, a technique that allows us to clean the measured data from instrumental effects, and its spectral imaging power, i.e., the ability to separate the signal into various sub-bands within each frequency band. QUBIC will observe the sky in two main frequency bands: 150 GHz and 220 GHz. A technological demonstrator is currently under testing and will be deployed in Argentina during 2019, while the final instrument is expected to be installed during 2020