title: 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.
abstract: 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.
authors.affiliation: Department of Large Animal Clinical Science, College of Veterinary Medicine, Texas A&M University, College Station, TX 77845, USA. jthompson@cvm.tamu.edu
authors.forename: James Alan
authors.initials: JA
authors.lastname: Thompson
authors.forename: Ricardo
authors.initials: R
authors.lastname: de Miranda Henriques Leite
authors.forename: Vítor Salvador Picão
authors.initials: VS
authors.lastname: Gonçalves
authors.forename: Rômulo Cerqueira
authors.initials: RC
authors.lastname: Leite
authors.forename: Dimas A
authors.initials: DA
authors.lastname: Bandeira
authors.forename: Geder Paulo
authors.initials: GP
authors.lastname: Herrmann
authors.forename: Elvio Carlos
authors.initials: EC
authors.lastname: Moreira
authors.forename: Paulo Emílio Franco
authors.initials: PE
authors.lastname: Prado
authors.forename: Zélia Inês Portela
authors.initials: ZI
authors.lastname: Lobato
authors.forename: Cristiane Pinheiro Toscano
authors.initials: CP
authors.lastname: de Brito
authors.forename: Andrey Pereira
authors.initials: AP
authors.lastname: Lage
mesh_terms: 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
chemical_list: D000907:Antibodies, Bacterial; D000914:Antibodies, Viral