[Experience in examining infectious hepatitis patients by using a viral detection method]

Area of Science:

• Virology
• Immunology
• Pediatrics

Context:

• Hepatitis A virus (HAV) infection is a significant public health concern, particularly in pediatric populations.
• Accurate and timely diagnosis is crucial for managing infectious hepatitis and preventing its spread.
• Understanding the duration and patterns of viral shedding is essential for epidemiological control.

Purpose:

• To evaluate the efficacy of immune electron microscopy (IEM) as a diagnostic tool for detecting HAV in stools.
• To determine the rate and duration of HAV shedding in children with infectious hepatitis.
• To investigate the relationship between viral shedding, disease presentation, and immune response.

Summary:

• Immune electron microscopy (IEM) successfully detected hepatitis A virus (HAV) particles in the stools of children with infectious hepatitis, even in later disease stages.
• A 10.5% positive detection rate was observed in 225 children, with shedding lasting approximately two weeks post-onset.
• Both typical and anicteric forms of hepatitis A were associated with virus shedding, independent of delayed IgM response.
• HAV particles identified were antigenically similar to strains found internationally.

Impact:

• IEM is a viable diagnostic method for identifying HAV in infectious hepatitis cases.
• Findings underscore the potential for prolonged virus shedding, emphasizing the need for continued vigilance in preventing transmission.
• The study contributes to understanding the clinical and epidemiological characteristics of hepatitis A in children.