tailieunhanh - Báo cáo hóa học: " Interspecies and intraspecies transmission of triple reassortant H3N2 influenza A viruses"

Tham khảo tài liệu 'báo cáo hóa học: " interspecies and intraspecies transmission of triple reassortant h3n2 influenza a viruses"', luận văn - báo cáo phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Virology Journal BioMed Central Research Interspecies and intraspecies transmission of triple reassortant H3N2 influenza A viruses Hadi M Yassine1 Mohammad Q Al-Natour2 Chang-Won Lee1 and Yehia M Saif 1 Open Access Address 1Food Animal Health Research Program Ohio Agricultural Research and Development Center The Ohio State University Wooster OH USA and 2Department of Pathology and Animal Health Faculty of Veterinary Medicine Jordan University of Science and Technology Irbid Jordan Email Hadi M Yassine - Mohammad Q Al-Natour - mqalnatour@ Chang-Won Lee - Yehia M Saif - Corresponding author Published 28 November 2007 Received 24 September 2007 Accepted 28 November 2007 Virology Journal 2007 4 129 doi 1743-422X-4-129 This article is available from http content 4 1 129 2007 Yassine et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. Abstract The triple reassortant H3N2 viruses were isolated for the first time from pigs in 1998 and are known to be endemic in swine and turkey populations in the United States. In 2004 we isolated two H3N2 triple reassortant viruses from two turkey breeder flocks in Ohio and Illinois. Infected hens showed no clinical signs but experienced a complete cessation of egg production. In this study we evaluated three triple reassortant H3N2 isolates of turkey origin and one isolate of swine origin for their transmission between swine and turkeys. Although all 4 viruses tested share high genetic similarity in all 8 genes only the Ohio strain A turkey Ohio 313053 04 was shown to transmit efficiently both ways between swine and turkeys. One isolate