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  • Title: [Distribution of neutralizing measles serum antibodies according to age in women of childbearing age in France in 2005-2006].
    Author: Gagneur A, Pinquier D, Aubert M, Soubeyrand B, Balu L, Brissaud O, Gras-Le-Guen C, Hau-Rainsard I, Mory O, Picherot G, De Pontual L, Stephan JL, Reinert P.
    Journal: Arch Pediatr; 2008 Oct; 15(10):1525-30. PubMed ID: 18804979.
    Abstract:
    UNLABELLED: Measles-vaccine coverage (MVC) increased significantly only beginning in 1983 based on the official recommendations. The majority of women born after 1983 should have vaccine-acquired rather than naturally derived immunity. Passively transferred measles antibodies (Mab) are expected to provide protection to offsprings during their 1st few months of life. OBJECTIVE: Compare neutralizing Mab titers according to age in women aged 12-40 years, i.e., born before and after 1983. METHODS: A multicenter seroepidemiological study was conducted in France in 2005-2006; 210 outpatient or hospitalized women were enrolled and classified into 4 age groups (12-18, 19-22, 23-30, and 31-40 years). Mab titers were assessed using a reference plaque reduction neutralization assay (protection threshold > 120 mIU/ml). RESULTS: Ninety-four percent of subjects had a Mabs titer greater than 120 mIU/ml. Women born before 1983 had significantly higher geometric mean titers (GMTs) of Mabs than those born after 1983(1358 mIU/ml vs. 731 mIU/ml [p<0.001]). The comparison of the 4 cohorts showed a significant decrease (p<0.001) in GMTs of Mab in the female population with increasing age (670, 771, 1173, and 1821 mUI/ml, respectively, in the 12-18, 19-22, 23-30, and 31-40 years age groups). For the 1st time in France, we show in women of childbearing age that in 2005-2006 neutralizing Mab GMTs were far above protective threshold for all age groups. Women in younger age groups (with high MVC) have significantly lower Mab titers. A lower passive transfer of Mab to their offsprings could result in a shorter period of measles protection and question the measles vaccine 1st dose at 1 year.
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