PMID- 12680645 OWN - NLM STAT- MEDLINE DCOM- 20030530 LR - 20190522 IS - 1040-6387 (Print) IS - 1040-6387 (Linking) VI - 14 IP - 1 DP - 2002 Jan TI - Detection and differentiation of North American and European genotypes of porcine reproductive and respiratory syndrome virus in formalin-fixed, paraffin-embedded tissues by multiplex reverse transcription-nested polymerase chain reaction. PG - 56-60 AB - North American and European genotypes of porcine reproductive and respiratory syndrome virus (PRRSV) were distinguished in formalin-fixed, paraffin-embedded tissues from PRRSV-infected pigs by multiplex reverse transcription-nested polymerase chain reaction (RT-nPCR). A method based on xylene deparaffinization followed by proteinase K digestion yielded RNA of quality for reliable and consistent RT-nPCR analyses. The PRRSV nucleic acid was detected in lung, mediastinal lymph node, tonsil, and liver samples from pigs inoculated with North American strain virus, European strain virus, or both North American and European strains. All 30 archival formalin-fixed, paraffin-embedded lung tissues from pigs naturally infected with PRRSV were positive for PRRSV by RT-nPCR amplication and gave a pattern that corresponded to the North American genotype. Multiplex RT-nPCR could be applied successfully to formalin-fixed, paraffin-embedded tissues for the detection and differentiation between North American and European genotypes of PRRSV. FAU - Chung, Han-Kook AU - Chung HK AD - Department of Veterinary Pathology, College of Veterinary Medicine and School of Agricultural Biotechnology, Seoul National University, Suwon 441-744, Kyounggi-Do, Republic of Korea. FAU - Choi, Changsun AU - Choi C FAU - Kim, Junghyun AU - Kim J FAU - Chae, Chanhee AU - Chae C LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - J Vet Diagn Invest JT - Journal of veterinary diagnostic investigation : official publication of the American Association of Veterinary Laboratory Diagnosticians, Inc JID - 9011490 RN - 0 (DNA, Viral) RN - 1HG84L3525 (Formaldehyde) SB - IM MH - Animals MH - DNA, Viral/*analysis/genetics MH - Europe MH - Formaldehyde MH - Genotype MH - Liver/virology MH - Lung/virology MH - Lymph Nodes/virology MH - North America MH - Palatine Tonsil/virology MH - *Paraffin Embedding MH - Porcine Reproductive and Respiratory Syndrome/virology MH - Porcine respiratory and reproductive syndrome virus/classification/*genetics/*isolation & purification MH - Reverse Transcriptase Polymerase Chain Reaction/*methods MH - Swine/*virology MH - *Tissue Fixation EDAT- 2003/04/12 05:00 MHDA- 2003/05/31 05:00 CRDT- 2003/04/12 05:00 PHST- 2003/04/12 05:00 [pubmed] PHST- 2003/05/31 05:00 [medline] PHST- 2003/04/12 05:00 [entrez] AID - 10.1177/104063870201400111 [doi] PST - ppublish SO - J Vet Diagn Invest. 2002 Jan;14(1):56-60. doi: 10.1177/104063870201400111.