Hepatitis B | Podcast

Overview

Ninja Nerd's podcast episode on Hepatitis B outlines diagnostic approaches, differentiating acute from chronic infections using the HBV triple panel (HBsAg, anti-HBc IgM/IgG, anti-HBs). It details management strategies, emphasizing supportive care for acute cases and antiviral considerations for chronic infections, particularly in pregnant individuals, those with liver injury, or cirrhosis. The discussion also covers the significant long-term risks of chronic Hepatitis B, including cirrhosis and hepatocellular carcinoma, and highlights the importance of vaccination and post-exposure prophylaxis.

Key takeaways

The Hepatitis B triple panel (HBsAg, anti-HBc IgM/IgG, anti-HBs) is crucial for diagnosing acute, chronic, resolved, or vaccinated states.
Acute Hepatitis B in healthy adults typically resolves with supportive care; antivirals are reserved for acute liver failure or specific high-risk groups.
Chronic Hepatitis B, often acquired perinatally, significantly increases the risk of cirrhosis and hepatocellular carcinoma over decades.
Antiviral therapy for chronic Hepatitis B is indicated for patients with elevated liver enzymes, cirrhosis, pregnancy, or immunocompromise.
The Hepatitis B vaccine provides active immunity, while Hepatitis B immunoglobulin offers passive immunity for post-exposure prophylaxis.
Hepatitis B can be associated with extrahepatic manifestations like polyarteritis nodosa and kidney diseases due to immune complex deposition.

Chapters

0:00 Introduction to Hepatitis B and Screening Indications

Hepatitis B is discussed following Hepatitis A, with Hepatitis C and E to follow.
Screening for Hepatitis B is indicated for patients presenting with acute hepatitis symptoms like jaundice, dark urine, and elevated LFTs.
Risk factors include IV drug abuse, perinatal exposure, sexual behavior, and universal screening for adults 18+ and pregnant women.
Immunocompromised individuals and those with cirrhosis are also high-risk groups.

5:07 The Hepatitis B Triple Panel and Serology Interpretation

The HBV triple panel includes Hepatitis B surface antigen (HBsAg), total Hepatitis B core antibody (anti-HBc), and Hepatitis B surface antibody (anti-HBs).
HBsAg indicates current infection (acute or chronic).
Anti-HBs indicates immunity from vaccination or recovery.
Anti-HBc IgM suggests acute infection, while anti-HBc IgG suggests chronic infection or past resolved infection.

8:13 Hepatitis B Vaccination and Post-Exposure Prophylaxis

The Hepatitis B vaccine is a three-dose series recommended for infants and catch-up for individuals under 60.
A two-dose adult series is also available.
Vaccination generates active immunity via anti-HBs antibodies.
Post-exposure prophylaxis involves HBV vaccine plus Hepatitis B immunoglobulin for immediate passive immunity.

10:36 Case 1: Acute Hepatitis B Presentation and Management

A 27-year-old male presents with fatigue, nausea, rash, dark urine, and jaundice after unprotected sex.
High AST/ALT (1650/2100) and elevated bilirubin (6.8) with normal INR (1.1) and no biliary obstruction point to hepatocellular injury.
Positive HBsAg, positive anti-HBc IgM, and negative anti-HBs confirm acute Hepatitis B.
Acute Hepatitis B in healthy adults is managed with supportive care, as spontaneous resolution occurs in over 95%.

21:59 Case 2: Chronic Hepatitis B and Long-Term Complications

A 38-year-old woman born outside the US, with a mother who had Hepatitis B, presents with mild fatigue and transaminitis.
Vertical transmission is the most common global route, leading to chronic infection due to immature immune responses in neonates.
Chronic Hepatitis B (HBsAg positive >6 months, IgG anti-HBc) carries risks of cirrhosis and hepatocellular carcinoma (HCC).
Treatment for chronic Hepatitis B is indicated for liver injury (ALT/AST >2x ULN), cirrhosis, pregnancy, or immunocompromise, using antivirals like entecavir or tenofovir.

Summary, takeaways, and chapters were generated by AI from the video's transcript and may contain errors. The video belongs to its creator, Ninja Nerd.