TY - GEN AU - Duinhof,T F AU - van Schaik,G AU - van Esch,E J B AU - Wellenberg,G J TI - Detection of PRRSV circulation in herds without clinical signs of PRRS: comparison of five age groups to assess the preferred age group and sample size SN - 1873-2542 PY - 2012///0508 KW - Animals KW - Antibodies, Viral KW - blood KW - Cross-Sectional Studies KW - Enzyme-Linked Immunosorbent Assay KW - Female KW - Logistic Models KW - Male KW - Porcine Reproductive and Respiratory Syndrome KW - diagnosis KW - Porcine respiratory and reproductive syndrome virus KW - isolation & purification KW - Prevalence KW - Sample Size KW - Seroepidemiologic Studies KW - Swine KW - virology N1 - Publication Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't UR - https://doi.org/10.1016/j.vetmic.2011.01.001 ER -