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Related Experiment Videos

Poliomyelitis in vaccinated children.

S Sen, D Sharma, S Singh

    Indian Pediatrics
    |May 1, 1989
    PubMed
    Summary

    Children vaccinated against polio but still contracting the disease showed better recovery and muscle strength. Non-polio agents and vaccine-induced paralysis were noted in some vaccinated cases.

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    Area of Science:

    • Pediatrics
    • Infectious Diseases
    • Vaccinology

    Background:

    • Poliomyelitis remains a significant public health concern.
    • Oral polio-vaccine (OPV) is widely used for prevention.
    • Breakthrough polio infections despite vaccination warrant further investigation.

    Purpose of the Study:

    • To compare clinical and serological characteristics of children with poliomyelitis who received OPV versus unvaccinated children.
    • To identify etiological agents and assess recovery patterns in vaccinated vs. unvaccinated polio patients.

    Main Methods:

    • Clinical and serological evaluation of 52 children with vaccine failure poliomyelitis (Group A) and 28 unvaccinated children with poliomyelitis (Group B).
    • Analysis of provocative injections, muscle power, poliovirus types, antibody titers, and recovery rates.

    Main Results:

    • Group A (vaccinated) showed higher incidence of provocative injections and better initial muscle power than Group B (unvaccinated).
    • Poliovirus type 2 was common in Group A, while type 1 was dominant in Group B.
    • 53.8% of Group A had protective antibody titers, compared to 4% in Group B; 6% in Group A had antibodies to all three types, with disease caused by non-polio agents.
    • Two cases in Group A were possibly vaccine-induced paralysis.
    • Recovery after 60 days was significantly better in Group A.

    Conclusions:

    • Vaccinated children experiencing poliomyelitis demonstrate distinct clinical and etiological profiles compared to unvaccinated individuals.
    • While OPV failure occurs, vaccination is associated with better outcomes and different etiological patterns.
    • Non-polio agents and rare vaccine-induced paralysis are considerations in vaccine failure cases.

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