PMID- 11602772 OWN - NLM STAT- MEDLINE DCOM- 20011204 LR - 20200217 IS - 0022-1317 (Print) IS - 0022-1317 (Linking) VI - 82 IP - Pt 11 DP - 2001 Nov TI - High frequency RNA recombination in porcine reproductive and respiratory syndrome virus occurs preferentially between parental sequences with high similarity. PG - 2615-2620 LID - 10.1099/0022-1317-82-11-2615 [doi] AB - Two types of porcine reproductive and respiratory syndrome virus (PRRSV) exist, a North American type and a European type. The co-existence of both types in some countries, such as Denmark, Slovakia and Canada, creates a risk of inter-type recombination. To evaluate this risk, cell cultures were co-infected with either a North American and a European type of PRRSV or two diverse types of European isolate. Subsequently, an approximately 600 bp region of the PRRSV genome was tested for recombination by quantitative real-time RT-PCR. Between 0.1 and 2.5% RNA recombination was found between the European isolates, but no recombination was detected between the European and North American types. Calculation of the maximum theoretical risk of European-American recombination, based on the sensitivity of the RT-PCR system, revealed that RNA recombination between the European and North American types of PRRSV is at least 10 000 times less likely to occur than RNA recombination between diverse European isolates. FAU - van Vugt, Joke J F A AU - van Vugt JJFA AD - Danish Veterinary Institute for Virus Research, Lindholm, DK-4771 Kalvehave, , Denmark1. FAU - Storgaard, Torben AU - Storgaard T AD - Danish Veterinary Institute for Virus Research, Lindholm, DK-4771 Kalvehave, , Denmark1. FAU - Oleksiewicz, Martin B AU - Oleksiewicz MB AD - Danish Veterinary Institute for Virus Research, Lindholm, DK-4771 Kalvehave, , Denmark1. FAU - Botner, Anette AU - Botner A AD - Danish Veterinary Institute for Virus Research, Lindholm, DK-4771 Kalvehave, , Denmark1. LA - eng SI - GENBANK/AF315699 SI - GENBANK/AF315700 SI - GENBANK/AF315701 SI - GENBANK/AF315702 SI - GENBANK/AF315703 SI - GENBANK/AF315704 SI - GENBANK/AF315705 SI - GENBANK/AF315706 SI - GENBANK/AF315707 SI - GENBANK/AF315708 SI - GENBANK/AF315709 SI - GENBANK/AF315710 SI - GENBANK/AF315711 SI - GENBANK/AY034879 PT - Evaluation Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - J Gen Virol JT - The Journal of general virology JID - 0077340 RN - 0 (DNA, Complementary) RN - 0 (RNA, Viral) SB - IM MH - Animals MH - Cells, Cultured MH - DNA, Complementary/genetics MH - Molecular Sequence Data MH - Porcine Reproductive and Respiratory Syndrome/virology MH - Porcine respiratory and reproductive syndrome virus/classification/*genetics MH - RNA, Viral/*genetics MH - *Recombination, Genetic MH - *Reverse Transcriptase Polymerase Chain Reaction MH - Sequence Analysis, DNA MH - Swine EDAT- 2001/10/17 10:00 MHDA- 2002/01/05 10:01 CRDT- 2001/10/17 10:00 PHST- 2001/10/17 10:00 [pubmed] PHST- 2002/01/05 10:01 [medline] PHST- 2001/10/17 10:00 [entrez] AID - 10.1099/0022-1317-82-11-2615 [doi] PST - ppublish SO - J Gen Virol. 2001 Nov;82(Pt 11):2615-2620. doi: 10.1099/0022-1317-82-11-2615.