INVESTIGADORES
TRONO Karina Gabriela
artículos
Título:
Unpasteurized milk from the bulk tank used for
Autor/es:
NATALIA PORTA; JAWORSKI JUAN PABLO; GALARZA ROXANA; GERONIMO GUTIERREZ; POLITZKI ROMINA; ALVAREZ IRENE; CALVINHO LUIS; TRONO KARINA
Revista:
RETROVIROLOGY
Editorial:
BIOMED CENTRAL LTD
Referencias:
Lugar: Londres; Año: 2015 vol. 12 p. 38 - 38
ISSN:
1742-4690
Resumen:
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 the bulk tank located at the
milking parlor. Blood and milk samples were obtained
from 49 randomly selected animals. In addition, we collected
10 milk samples from the bulk tank along a onemonth
period. We tested all samples for the presence
and quantity of BLV DNA and BLV-specific antibodies
(Abs). We observed an individual serological prevalence
of 94 % and 96 % considering the whole dairy herd
(n=332) and the subgroup of animals (n=49), respectively.
From the latest group we detected the presence
of BLV DNA in 60 % and 30 % of blood and milk samples,
respectively. In addition we detected BLV Abs in
90 % of individual milk samples. Then, we assayed milk
samples from the bulk tank (n=10) detecting BLV Abs
in all cases and the presence of BLV DNA in 8 out of
10 opportunities. Finally, we observed a weak positive
correlation between the levels of cell associated viral
load (CAVL) in blood and BLV Abs in serum and milk.
The overall prevalence described here is in agreement
with the one described for other farms with a similar
level of production. Furthermore, we found that there
were a higher proportion of milk samples carrying BLV
DNA in the bulk tank compared to individual milk samples.
Feeding calves using unpasteurized milk from this
source could increase the risk of transmission by at leas