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| Content Provider | Springer Nature Link |
|---|---|
| Author | Georgopoulou, A. Markoulatos, P. |
| Copyright Year | 2001 |
| Abstract | Attenuated strains of the Sabin oral poliovirus vaccine replicate in the human gut and, in rare cases, cause vaccine-associated paralytic poliomyelitis. In the present study, 15 vaccine-derived strains isolated from patients with vaccine-associated paralytic poliomyelitis and from healthy vaccinees were examined. Four distant sequences of the poliovirus genome (5′ NCR, VP3/VP1, VP1/2A, and 3DPol/3′ NCR) were targeted, and the reverse-transcribed segments were amplified by polymerase chain reaction followed by restriction fragment length polymorphism analysis with four restriction enzymes. Among the 15 isolates (11 Sabin type 2, 3 Sabin type 1, and 1 Sabin type 3), four Sabin type 2 isolates (36%) were found to be intertypic vaccine/vaccine recombinant in the 3DPol/3′ NCR region of the viral genome. The recombinant genotypes identified were S2/S2/S1 for two isolates and S2/S2/S2/S3 and S2/S2/S1/S2 for each of the other two isolates, respectively. Recombinant viruses with unmodified segments in the 5′ NCR and the VP3/VP1 regions of the viral genome, a modified segment in the VP1/2A region only for one strain, and an often recombinant segment in the 3DPol/3′ NCR parts of the genome were so identified. These findings provide strong evidence that recombination is a frequent phenomenon in type 2 poliovirus vaccine strains and suggest that recombination may be an important mechanism of the natural evolution of polioviruses of Sabin type 2 origin, perhaps even one of the mechanisms of reversion of attenuated vaccine strains toward neurovirulence. |
| Starting Page | 792 |
| Ending Page | 799 |
| Page Count | 8 |
| File Format | |
| ISSN | 09349723 |
| Journal | European Journal of Clinical Microbiology & Infectious Diseases |
| Volume Number | 20 |
| Issue Number | 11 |
| e-ISSN | 14354373 |
| Language | English |
| Publisher | Springer Berlin Heidelberg |
| Publisher Date | 2001-11-01 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Medical Microbiology Internal Medicine |
| Content Type | Text |
| Resource Type | Article |
| Subject | Infectious Diseases Microbiology (medical) |
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