What question did this study set out to answer?

To evaluate poliovirus susceptibility among inner-city preschool children and determine the extent to which secondary transmission of live attenuated oral poliovirus vaccine virus confers immunity.

June 5, 1996JAMA

Seroprevalence of Antibody Against Poliovirus in Inner-city Preschool Children

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Why the study?

Does the number of oral poliovirus vaccine doses and secondary spread affect type-specific immunity in inner-city preschool children?

Population

526 inner-city preschool children aged 12 to 47 months seeking medical care, and 144 children aged 12 to 35…

Comparison

Oral poliovirus vaccine vs Fewer or no doses of oral poliovirus vaccine

Design

Cross-sectional

Authors

RCR. T. ChenCenters for Disease Control and Prevention

Discussion

Member takes

Implication

Multiple OPV doses predict high seropositivity in inner-city preschoolers; leaves open secondary spread's role and needs prospective confirmation.

Key Points

To evaluate poliovirus susceptibility among inner-city preschool children and determine the extent to which secondary transmission of live attenuated oral poliovirus vaccine virus confers immunity.
Conducted a cross-sectional seroprevalence study of 526 children aged 12 to 47 months and an evaluation of secondary spread in 144 unvaccinated children aged 12 to 35 months across inner-city clinics in Houston, Texas, and Detroit, Michigan (1990–1991).
Measured serum neutralizing antibody levels against poliovirus serotypes 1, 2, and 3, correlating immunity with age, sociodemographic factors, and documented oral poliovirus vaccine doses.
Seropositivity rates ranged from approximately 80% for types 1 and 3 in children aged 12 to 23 months to greater than 90% in those aged 36 to 47 months.
Vaccine dose count was the strongest predictor of seropositivity (P < .01), reaching approximately 90% across all three serotypes in children receiving 3 or more doses.
Among unvaccinated children, seroprevalence was 9% to 18% for types 1 and 3 and 29% to 42% for type 2, demonstrating that secondary spread occurred primarily in children with one or fewer vaccine doses.

Structured PICO

Does the number of oral poliovirus vaccine doses and secondary spread affect type-specific immunity in inner-city preschool children?

Population

526 inner-city preschool children aged 12 to 47 months seeking medical care, and 144 children aged 12 to 35 months without a history of previous oral poliovirus vaccination

Intervention

Oral poliovirus vaccine (observational assessment of vaccination status)

Comparator

Fewer or no doses of oral poliovirus vaccine

Outcome

Serum neutralizing antibody levels against poliovirus types 1, 2, and 3surrogate

Levels of immunity to poliovirus among inner-city preschoolers are high and strongly predicted by the number of oral poliovirus vaccine doses received, with secondary spread playing a modest role.

Cite This Study

R. T. Chen (1996) studied this question.

synapsesocial.com/papers/6a6ffe412163a0a01bc43837 https://doi.org/10.1001/jama.1996.03530450029028

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Implication

Multiple OPV doses predict high seropositivity in inner-city preschoolers; leaves open secondary spread's role and needs prospective confirmation.

Seroprevalence of Antibody Against Poliovirus in Inner-city Preschool Children

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Seroprevalence of Antibody Against Poliovirus in Inner-city Preschool Children

Discussion

Member takes

Implication

Key Points

Structured PICO

Cite This Study

Also Consider

Also Consider