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Mutated Sabin poliovirus shed after administration of oral poliovirus vaccine.

Vaccine Weekly

| September 01, 2004 | COPYRIGHT 2004 NewsRX. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)Copyright

2004 SEP 1 - (NewsRx.com & NewsRx.net) -- Sabin poliovirus type 3 containing the nucleotide 472 uracil-to-cytosine point mutation is shed after administration of oral poliovirus vaccine.

According to recent research published in the Journal of Infectious Diseases, "A uracil-to-cytosine point mutation at nucleotide (nt) 472 of Sabin oral poliovirus vaccine (OPV) type 3 is found in conjunction with vaccine-associated paralytic poliomyelitis (VAPP). Direct RNA extraction and mutant analysis by polymerase chain reaction and restriction enzyme cleavage were used to identify this point mutation in clinical samples. A total of 238 stool samples were obtained from 28 healthy infants for 6 weeks after OPV vaccination."

"More than 25% of infants shed OPV3 in the week after vaccination, with a decrease on day 6," reported Claudia V. Martinez and colleagues at Stanford University. "A second wave of OPV3 shedding occurred beginning the second week after vaccination and was maintained through the end of the study period. During the first week after vaccination, the proportion of nt 472 mutants in the shed OPV3 increased from undetectable to almost 100%. During the ...

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