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J Gen Virol 85 (2004), 1591-1595; DOI 10.1099/vir.0.19653-0

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© 2004 Society for General Microbiology

Short Communication

Phylogenetic analysis of wild-type 1 polioviruses isolated during the final period of transmission in Turkey

Etem Özkaya1, Hiroaki Ishiko2, Rika Miura2, Yasushi Shimada2, Iffet Alaeddinoglu1, Cigdem Artuk1, Kikuko Miyamura3 and Shudo Yamazaki2

1 Virology Department, Refik Saydam National Hygiene Center, Cemal Gursel Cad 16, Sihhiye 06100, Ankara, Turkey
2 Research and Development Department, Mitsubishi Kagaku Bio-Clinical Laboratories Inc., Shimura 3-30-1, Itabashi-ku, Tokyo 174-8555, Japan
3 Japan International Cooperation Agency, Yoyogi 2-1-1, Shibuya-ku, Tokyo 151-8558, Japan

Correspondence
Etem Özkaya
eozkaya{at}saglik.gov.tr

The last poliomyelitis case associated with a wild poliovirus in Turkey occurred in November 1998. This was the last known case of paralytic poliomyelitis caused by indigenous wild poliovirus in the World Health Organization's European Region. This study investigated the genetic relationships of wild-type 1 polioviruses at the latest period of transmission. A phylogenetic tree was constructed on the basis of the VP1/2A sequence from 14 wild-type 1 polioviruses isolated from Turkey in 1994–1998, along with those from other areas of the world. The Turkey isolates in the latest period of transmission were closely related to each other, forming a cluster distinct from other strains. The results showed that these viruses had been spreading indigenously in the eastern and south-eastern parts of Turkey, and ceased transmission there during 1998. This finding serves as a reference for future poliovirus surveillance both in Turkey and worldwide.






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