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Refresher training in administering intradermal BCG-vaccine increased BCG-scarring rates in rural Guinea-Bissau
Julie Odgaard Vedel1, Oides Furtado2, Laerte Lima Almeida2
1Bandim Health Project, Bissau, Guinea-Bissau; Research Unit OPEN, University of Southern Denmark/Odense University Hospital, Denmark.
Background:
A correct vaccination technique is important for developing BCG scars. Having a BCG scar is associated with lower mortality among BCG-vaccinated children.
Aim:
To compare BCG-scar prevalences among children vaccinated before and after refresher training in BCG vaccination technique.
Methods:
BCG-scar prevalence is assessed through a health and demographic surveillance system in rural Guinea-Bissau. In the context of a randomised trial, staff at health facilities in three regions (intervention area) received refresher training on BCG vaccination technique. In a fourth region (control area) no training was implemented. In logistic regression models, we compared scar prevalence among children vaccinated before and after the training.
Results:
BCG-scar prevalence increased from 75 % to 92 % (odds ratio (OR) = 4.19, 95 %CI 2.92-6.01) in the intervention area and from 71 % to 78 % (OR = 1.43, 95 %CI 0.89-2.29) in the control area (p-value for same increase: <0.001).
Conclusion:
BCG scarring rates increased after training in vaccination technique.
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