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[Hepatitis A antibodies in children]
Insights
Low socioeconomic status significantly increases the risk of hepatitis A virus (HAV) infection, particularly in children. This study highlights the importance of socioeconomic factors in the epidemiology of viral hepatitis.
Area of Science:
- Hepatology
- Infectious Diseases
- Public Health
Background:
- Viral hepatitis is classified into Type A, Type B, and non-A-non-B types.
- Socioeconomic status is a potential factor influencing the spread of infectious diseases.
Purpose of the Study:
- To investigate the role of socioeconomic status in the spread of viral hepatitis.
- To determine the prevalence of hepatitis A virus (HAV) antibodies in different socioeconomic groups.
- To analyze the seroconversion rates and identify non-A-non-B hepatitis cases.
Main Methods:
- Serological testing for anti-HAV antibodies in children from low and high socioeconomic backgrounds.
- Analysis of seroconversion in children with acute hepatitis.
- Study of anti-HAV prevalence in children with non-hepatic diseases across different age groups.
- Clinical evaluation of prolonged hepatitis cases.
Main Results:
- 97% of children from low socioeconomic status communities had anti-HAV antibodies, compared to 40% in higher socioeconomic groups.
- 90% of children with acute hepatitis showed seroconversion to anti-HAV; 10% were non-A-non-B.
- Anti-HAV prevalence increased with age, reaching 100% in children over four years old.
- Five out of ten patients with prolonged hepatitis were possibly non-A-non-B.
Conclusions:
- Low socioeconomic status is a significant factor in the spread of hepatitis A.
- Age is strongly correlated with HAV exposure, with higher prevalence in older children.
- A notable proportion of prolonged hepatitis cases may be attributed to non-A-non-B viral agents.
Abstract:
With the finding of HBV and HAV, it is possible at the present time to recognize according to its etiology three types of viral hepatitis: type A, Type B and type non-A-non-B. In this paper we have proved that a low socioeconomic status plays a very important role in the spreading of this disease. In a community with a low socioeconomic status, of forty children attending the fourth grade of a primary school, 97 percent were found to have anti-HA: while in a similar group of children with a higher socioeconomic background, we found only 40 per cent of positive cases. A positive sero convertion to anti-HA was found in 90 per cent of the 73 children with acute hepatitis; the remaining 10 per cent were non-A-non-B. A group of 61 children admitted to the L. Calvo Mackenna Children's Hospital with acute or chronic non hepatic disease were studied for anti-HA. We found 77% positive cases in the group of infants under 4 months old; in older infants, a low incidence of anti-HA was observed, but a notorious increase of positive cases was seen after the age of two years, reaching 100 percent of positive cases in children above four years of age. In ten patients studied with prolonged hepatitis, five of them could be possibly classified as having a non-A-non-B hepatitis.