Initial evaluation of universal immunization with a single dose against hepatitis A virus in Central Brazil
Braz. j. infect. dis
; Braz. j. infect. dis;22(3): 166-170, May-June 2018. tab
Article
在 En
| LILACS
| ID: biblio-974214
Responsible library:
BR1.1
ABSTRACT
ABSTRACT Vaccination against the hepatitis A virus (HAV) administered in two doses has been used effectively in universal child immunization programs in several countries. A single-dose vaccination was adopted in some low-income countries in an attempt to reduce costs without losing effectiveness. In 2014, single-dose universal vaccination was introduced in Brazil for children aged two years. Since such strategy is still not universally accepted, its efficacy should be compared to the two-dose strategy. To assess the humoral response after the single-dose HAV vaccination schedule, a cross-sectional study was conducted in Primavera do Leste, in Mato Grosso state, Central Brazil, including 265 children vaccinated through the National Immunization Program. Blood was collected by using a digital puncture and further applied to filter paper cards. Anti-HAV was detected in 218 out of 265 dried blood spots (DBS). Blood venous samples were collected from 34 out of 47 children who were not anti-HAV positive in DBS samples. Eighteen of them tested positive for anti-HAV, giving a final score of 93.6% (236/252) of seropositivity. In conclusion, this study demonstrated a high rate of anti-HAV positivity in the short term after single-dose hepatitis A vaccination in the population investigated. Moreover, the DBS was shown to be a reliable tool for detecting anti-HAV antibodies.
Key words
全文:
1
索引:
LILACS
主要主题:
Mass Vaccination
/
Hepatitis A Vaccines
/
Hepatitis A Antibodies
/
Hepatitis A
研究类型:
Evaluation_studies
/
Observational_studies
/
Prognostic_studies
限制:
Child
/
Female
/
Humans
/
Male
国家/地区名称主题:
America do sul
/
Brasil
语言:
En
期刊:
Braz. j. infect. dis
期刊主题:
DOENCAS TRANSMISSIVEIS
年:
2018
类型:
Article