TY - JOUR
T1 - Complejo respiratorio bovino
T2 - evidencia de circulación viral múltiple en un establecimiento de cría
AU - Streitenberger, N.
AU - Ferella, A.
AU - Pérez Aguirreburualde, M. S.
AU - Sammarruco, A.
AU - Dus Santos, M. J.
AU - Mozgovoj, M. V.
AU - Maidana, S.
AU - Romera, S. A.
AU - Pecora, A.
AU - Quiroga, M. A.
AU - Fazzio, L. E.
PY - 2017/8
Y1 - 2017/8
N2 - Bovine respiratory complex (BRC) is a leading cause of production loss among beef, dairy and feedlot cattle. The infectious agents involved are viruses, bacteria and mycoplasma. Viral agents include Bovine respiratory syncytial virus (BRSV), Bovine parainfluenza-3 virus (BPI3V), Bovine herpesvirus 1 (BHV-1) and Bovine viral diarrhea virus (BVDV). The purpose of this study was to evaluate the circulation of viruses associated with BRC in a beef herd, postweaning, doing a longitudinal assessment of serological tests. Moreover, clinical and hematological findings were described and compared. Thirty two animals between 5 to 7 months old, with no vaccination record, were selected for a daily evaluation of clinical signs consistent with BRC. Blood samples were taken on day 0 (weaning), +14 and +25 (when the study ended). No clinical manifestation of BRC was found and hematological parameters were within the reference range. At the beginning of this study, animals did not show BRSV-specific antibodies (Ab), whereas for the other viral agents the percentage of seropositive animals varied: 53% (BVDV1a), 31% (BPI3V), 25% (BVDV2) and 13% (BHV-1). On day +25, percentages of seropositive animals were 47% (BVDV1a), 50% (BPI3V), 19% (BVDV2), 25% (BHV-1) and 81% (BRSV). Seroconversion percentages for BRSV, BPI3V, BVDV1a and BHV-1 were 34%, 25%, 16% and 13% respectively. Furthermore, 66% of the animals seroconverted to one or more viruses. No seroconversion was observed for BVDV2 and BVDV1b. Thus, there is evidence of circulation and -in some cases- co-infection with BRC-associated viral agents during postweaning. At said production stage, conducting viral follow-up studies to identify and characterize circulating strains is key, particularly in relation to BRSV and PI3, which we have little information about in our country.
AB - Bovine respiratory complex (BRC) is a leading cause of production loss among beef, dairy and feedlot cattle. The infectious agents involved are viruses, bacteria and mycoplasma. Viral agents include Bovine respiratory syncytial virus (BRSV), Bovine parainfluenza-3 virus (BPI3V), Bovine herpesvirus 1 (BHV-1) and Bovine viral diarrhea virus (BVDV). The purpose of this study was to evaluate the circulation of viruses associated with BRC in a beef herd, postweaning, doing a longitudinal assessment of serological tests. Moreover, clinical and hematological findings were described and compared. Thirty two animals between 5 to 7 months old, with no vaccination record, were selected for a daily evaluation of clinical signs consistent with BRC. Blood samples were taken on day 0 (weaning), +14 and +25 (when the study ended). No clinical manifestation of BRC was found and hematological parameters were within the reference range. At the beginning of this study, animals did not show BRSV-specific antibodies (Ab), whereas for the other viral agents the percentage of seropositive animals varied: 53% (BVDV1a), 31% (BPI3V), 25% (BVDV2) and 13% (BHV-1). On day +25, percentages of seropositive animals were 47% (BVDV1a), 50% (BPI3V), 19% (BVDV2), 25% (BHV-1) and 81% (BRSV). Seroconversion percentages for BRSV, BPI3V, BVDV1a and BHV-1 were 34%, 25%, 16% and 13% respectively. Furthermore, 66% of the animals seroconverted to one or more viruses. No seroconversion was observed for BVDV2 and BVDV1b. Thus, there is evidence of circulation and -in some cases- co-infection with BRC-associated viral agents during postweaning. At said production stage, conducting viral follow-up studies to identify and characterize circulating strains is key, particularly in relation to BRSV and PI3, which we have little information about in our country.
KW - BRC
KW - Clinical
KW - Hematology
KW - Postweaning
KW - Serology
KW - Viruses
UR - http://www.scopus.com/inward/record.url?scp=85029423194&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85029423194&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:85029423194
SN - 0325-8718
VL - 43
SP - 149
EP - 155
JO - Revista de Investigaciones Agropecuarias
JF - Revista de Investigaciones Agropecuarias
IS - 2
ER -