1921
image of Seroprevalence of Measles, Rubella, Tetanus, and Diphtheria Antibodies among Children in Haiti, 2017
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645
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Abstract

In Haiti, measles, rubella, and maternal and neonatal tetanus have been eliminated, but a diphtheria outbreak is ongoing as of 2019. We conducted a national representative, household-based, two-stage cluster survey among children aged 5–7 years in 2017 to assess progress toward maintenance of control and elimination of selected vaccine-preventable diseases (VPDs). We stratified Haiti into west region (west department, including the capital city) and non-west region (all other departments). We obtained vaccination history and dried blood spots, and measured antibody concentrations to VPDs on a multiplex bead assay. Among 1,146 children, national seropositivity was 83% (95% CI: 80–86%) for tetanus, 83% (95% CI: 81–85%) for diphtheria, 87% (95% CI: 85–89%) for measles, and 84% (95% CI: 81–87%) for rubella. None of the children had long-term immunity to tetanus or diphtheria (IgG concentration ≥ 1 international unit/mL). Seropositivity in the west region was lower than that in the non-west region. Vaccination coverage was 68% (95% CI: 61–74%) for ≥ 3 doses of tetanus- and diphtheria-containing vaccine (DTP3), 84% (95% CI: 80–87%) for one dose of measles–rubella (MR1) vaccine, and 20% (95% CI: 16–24%) for MR2. The seroprevalence of measles, rubella, and diphtheria antibodies is lower than population immunity levels needed to prevent disease transmission, particularly in the west region; reintroduction of these diseases could lead to an outbreak. To maintain VPD control and elimination, Haiti should achieve DTP3 and MR2 coverage ≥ 95%, and include tetanus and diphtheria booster doses in the routine immunization schedule.

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/content/journals/10.4269/ajtmh.20-0112
2020-07-06
2020-09-22
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http://instance.metastore.ingenta.com/content/journals/10.4269/ajtmh.20-0112
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  • Received : 10 Feb 2020
  • Accepted : 01 Jun 2020
  • Published online : 06 Jul 2020
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