Spatial hierarchical variances and age covariances for seroprevalence to Leptospira interrogans serovar hardjo, BoHV-1 and BVDV for cattle in the State of Paraíba, Brazil.
We estimated spatial hierarchal variances and age-group covariances for seroprevalence to Leptospira interrogans serovar hardjo (LeptoH), bovine viral-diarrhea virus (BVDV) and bovine herpesvirus type 1 (BoHV-1) among 2343 cattle from 72 properties sampled in the State of Paraíba, Brazil in 2000. From each property, eight animals in each of the four age categories were evaluated. The age categories studied were: pre-weaned (0-6 months), young (7-18 months), replacement (19-30 months) and mature (>30 months). Overall seroprevalence to LeptoH was 16.0% and showed clustering at all levels of the spatial hierarchy and had a high posterior probability of being negatively correlated between replacement and mature groups within herds. Seroprevalence to BoHV-1 was 46.6% and demonstrated very little clustering among levels of the spatial hierarchy and was positively correlated between young and replacement groups within herds. Seroprevalence to BVD was 22.2% and was strongly clustered within herds and was positively correlated between young and replacement age groups within herds.
Thompson
James Alan
JA
Department of Large Animal Clinical Science, College of Veterinary Medicine, Texas A&M University, College Station, TX 77845, USA. jthompson@cvm.tamu.edu
de Miranda Henriques Leite
Ricardo
R
Gonçalves
Vítor Salvador Picão
VS
Leite
Rômulo Cerqueira
RC
Bandeira
Dimas A
DA
Herrmann
Geder Paulo
GP
Moreira
Elvio Carlos
EC
Prado
Paulo Emílio Franco
PE
Lobato
Zélia Inês Portela
ZI
de Brito
Cristiane Pinheiro Toscano
CP
Lage
Andrey Pereira
AP
D000367:Age Factors; D000818:Animals; D000907:Antibodies, Bacterial / Q000097:blood; D000914:Antibodies, Viral / Q000097:blood; D001912:Bovine Virus Diarrhea-Mucosal Disease / Q000453:epidemiology* / Q000635:transmission; D001938:Brazil / Q000453:epidemiology; D002417:Cattle; D002418:Cattle Diseases / Q000453:epidemiology* / Q000635:transmission; D016000:Cluster Analysis; D001908:Diarrhea Viruses, Bovine Viral / Q000276:immunology; D007242:Herpesvirus 1, Bovine / Q000276:immunology*; D007241:Infectious Bovine Rhinotracheitis / Q000453:epidemiology* / Q000635:transmission; D007921:Leptospira interrogans / Q000276:immunology*; D007922:Leptospirosis / Q000453:epidemiology / Q000635:transmission / Q000662:veterinary*; D016036:Seroepidemiologic Studies
D000907:Antibodies, Bacterial; D000914:Antibodies, Viral