| porcine circovirus-2 associated disease in swine in ontario (2004 to 2005). | | 2006 | 16933552 |
| the emergence of a new strain of porcine circovirus-2 in ontario and quebec swine and its association with severe porcine circovirus associated disease--2004-2006. | in the late fall of 2004 more severe lesions of porcine circovirus-2 associated disease (pcvad) than usual occurred during an outbreak of porcine circovirus-2 (pcv-2) infection in ontario nursery and grower/finisher pigs. the lesions were of unprecedented severity and included diffuse bronchointerstitial pneumonia, granulomatous enteritis, vasculitis, interstitial nephritis, and new lesions of splenic infarction. some affected herds had up to 50% mortality. the outbreak correlated with the sudde ... | 2008 | 18505190 |
| spread of porcine circovirus associated disease (pcvad) in ontario (canada) swine herds: part i. exploratory spatial analysis. | the systemic form of porcine circovirus associated disease (pcvad), also known as postweaning multisystemic wasting syndrome (pmws) was initially detected in the early 1990s. starting in 2004, the canadian swine industry experienced considerable losses due to pcvad, concurrent with a shift in genotype of porcine circovirus type 2 (pcv2). objectives of the current study were to explore spatial characteristics of self-reported pcvad distribution in ontario between 2004 and 2008, and to investigate ... | 2010 | 21190587 |
| patterns of condemnation rates in swine from a federally inspected abattoir in relation to disease outbreak information in ontario (2005-2007). | strong correlations between clinical signs on farms and the presence of lesions at slaughter have been reported. the objective of this study was to determine if changes in condemnation rates provide a data source for surveillance of disease outbreaks in pigs. the data were obtained from 1 abattoir in ontario (2005-2007). the epidemiological relevance of the results was based on an outbreak of porcine circovirus associated disease (pcvad) in ontario in 2005. the total condemnations and condemnati ... | 2011 | 21461204 |
| phylogenetic networks to study the origin and evolution of porcine circovirus type 2 (pcv2) in cuba. | porcine circovirus type 2 (pcv2) is the essential etiological infectious agent of postweaning multisystemic wasting syndrome (pmws), which is considered one of the most economically important swine diseases worldwide. in this study, a comparison between methodologies based on classical phylogenetic trees and networks to infer the origin of pcv2 in cuba was performed. in addition, the mechanisms supporting the genetic variability of cuban pcv2 populations were investigated. a retrospective study, ... | 2011 | 21507587 |
| microbiological identification and analysis of swine tonsils collected from carcasses at slaughter. | the primary objective of this 7-month study was to determine the prevalence of porcine pathogens of the tonsil of the soft palate of swine at slaughter. additional objectives were to determine if sampling the carcasses of normal or abnormal hogs provided different microbiological profiles and if the slaughter plant provides a feasible sampling frame and environment for detecting and monitoring important pathogens in tonsils that have health implications for both swine and humans. a total of 395 ... | 2011 | 21731180 |
| spread of porcine circovirus associated disease (pcvad) in ontario (canada) swine herds: part ii. matched case-control study. | the emergence of porcine circovirus associated disease (pcvad) was associated with high mortality in swine populations worldwide. studies performed in different regions identified spatial, temporal, and spatio-temporal trends as factors contributing to patterns of the disease spread. patterns consistent with spatial trend and spatio-temporal clustering were already identified in this dataset. on the basis of these results, we have further investigated the nature of local spread in this report. t ... | 2010 | 21190586 |
| suitability and limitations of portion-specific abattoir data as part of an early warning system for emerging diseases of swine in ontario. | abstract: background: abattoir data have the potential to provide information for geospatial disease surveillance applications, but the quality of the data and utility for detecting disease outbreaks is not well understood. the objectives of this study were to 1) identify non-disease factors that may bias these data for disease surveillance and 2) determine if major disease events that took place during the study period would be captured using multi-level modelling and scan statistics. we analy ... | 2012 | 22225910 |
| observations on pigeon circovirus infection in ontario. | subclinical pigeon circovirus infection was diagnosed in 1-day-old to 6-week-old birds from a loft with no history of clinical disease. pigeons from other lofts presented with various illnesses and were found at necropsy to be concurrently infected with pigeon circovirus. | 1999 | 10495910 |