[Hepatotropic delta-virus infection in children]

Area of Science:

• Hepatology
• Virology
• Infectious Diseases

Background:

• Hepatitis delta virus (HDV) poses a significant public health concern.
• Understanding HDV transmission and clinical outcomes is crucial for effective management.

Purpose of the Study:

• To establish the level of HDV contamination in central Kazakhstan.
• To investigate the modes of HDV transmission (horizontal and vertical).
• To analyze the distinct clinical courses of HDV co-infection and superinfection in children.

Main Methods:

• Epidemiological assessment of HDV prevalence.
• Analysis of infection transmission routes.
• Comparative clinical evaluation of HDV co-infection versus superinfection in pediatric patients.

Main Results:

• High levels of HDV contamination identified in central Kazakhstan.
• Common injections identified as a primary mode of transmission.
• HDV superinfection in children frequently resulted in severe chronic active hepatitis (CAH) with pronounced symptoms and prolonged, relapsing courses.
• Cirrhosis developed in one-third of observed children by age 12.
• Significant differences noted between co-infection and superinfection outcomes.

Conclusions:

• HDV infection is widespread in central Kazakhstan, with injections being a key transmission route.
• HDV superinfection in children leads to severe liver disease, including CAH and cirrhosis.
• The distinct clinical presentations suggest varying hepatitis B virus (HBV) and HDV interactions.
• The progression of CAH may be linked to severe, stable immunodeficiency.