{"title":"Comparative effectiveness of different biological specimens for PRRSv detection in naturally infected fattening pigs.","authors":"Milena Monnier, Silvia Marro, Andrea Trossi, Marco Faccenda, Nicoletta Vitale, Roberto Zoccola, Ilaria Miceli, Francesca Rossi, Simone Peletto, Alessandro Dondo, Mariella Goria","doi":"10.12834/VetIt.3650.31701.2","DOIUrl":null,"url":null,"abstract":"<p><p>One of the most critical aspects of PRRS outbreak control in swine herds is the reliable virus detection in both newly introduced animals and replacement gilts. In present study we compared the effectiveness of different biological specimens which - alone or in combination - allow to detect PRRSv carrier animals by mean of Reverse Transcriptase nested PCR (RT-nPCR). Five different matrices (serum, nasal swab, oral fluid, tracheobronchial swab and bronchoalveolar lavage fluid - BALF), known to be effective for PRRSv detection, were included in diagnostic efficacy comparison. Thirty-five pigs newly introduced into a fattening unit of a PRRS chronically affected farm were randomly selected to be submitted to serial sampling of each of the matrices above described, during the first three months of fattening period. A Bayesian approach was used to analyze the RT-nPCR results (i.e., positive or negative) of each sampling method and their respective sensitivity was estimated. PRRSv was detected by RT-nPCR in at least one matrix from 58% to 100% of the pigs. Tracheobronchial swabbing, as well as the combination of tracheobronchial swabbing plus bronchoalveolar washing, or tracheobronchial swabbing plus serum sampling were proved to be the most sensitive sampling methods to detect PRRSv in naturally infected live pigs. This study enlightens as the tracheobronchial swabbing associated with RT-nPCR could be the most recommended diagnostic tool for assessing infection dynamics in pig herds.</p>","PeriodicalId":23550,"journal":{"name":"Veterinaria italiana","volume":"61 2","pages":""},"PeriodicalIF":0.5000,"publicationDate":"2025-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Veterinaria italiana","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.12834/VetIt.3650.31701.2","RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"VETERINARY SCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
One of the most critical aspects of PRRS outbreak control in swine herds is the reliable virus detection in both newly introduced animals and replacement gilts. In present study we compared the effectiveness of different biological specimens which - alone or in combination - allow to detect PRRSv carrier animals by mean of Reverse Transcriptase nested PCR (RT-nPCR). Five different matrices (serum, nasal swab, oral fluid, tracheobronchial swab and bronchoalveolar lavage fluid - BALF), known to be effective for PRRSv detection, were included in diagnostic efficacy comparison. Thirty-five pigs newly introduced into a fattening unit of a PRRS chronically affected farm were randomly selected to be submitted to serial sampling of each of the matrices above described, during the first three months of fattening period. A Bayesian approach was used to analyze the RT-nPCR results (i.e., positive or negative) of each sampling method and their respective sensitivity was estimated. PRRSv was detected by RT-nPCR in at least one matrix from 58% to 100% of the pigs. Tracheobronchial swabbing, as well as the combination of tracheobronchial swabbing plus bronchoalveolar washing, or tracheobronchial swabbing plus serum sampling were proved to be the most sensitive sampling methods to detect PRRSv in naturally infected live pigs. This study enlightens as the tracheobronchial swabbing associated with RT-nPCR could be the most recommended diagnostic tool for assessing infection dynamics in pig herds.
期刊介绍:
The journal was created as the Croce Azzurra in 1950.
A quarterly peer-reviewed journal devoted to veterinary public health and other aspects of veterinary science and medicine, Veterinaria Italiana is published by the Istituto Zooprofilattico Sperimentale dell’Abruzzo e del Molise ‘G. Caporale’ (Istituto Zooprofilattico Sperimentale dell''Abruzzo e del Molise) in Teramo, Italy.
The goal of the journal is to provide an international platform for veterinary public health information from Italy and other countries, particularly those in Eastern Europe and Africa, Asia and South America. Veterinarians and veterinary public health specialists are encouraged to share their knowledge and experience on this platform.