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Hepatitis A, B, C, D, E | 마이메르시 MyMerci
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Hepatitis A, B, C, D, E

NCLEX Review Guide: Hepatitis A, B, C, D, E

Hepatitis Overview & Types

Hepatitis A (HAV)

  • Transmission: Fecal-oral route through contaminated food, water, or close contact with infected person
  • Acute infection only - does not become chronic and provides lifelong immunity after recovery
  • Incubation period: 15-50 days with symptoms lasting 2-8 weeks
  • Most contagious 2 weeks before symptom onset and 1 week after jaundice appears

Key Points

  • Vaccine available - given in 2 doses 6 months apart
  • No chronic form - complete recovery expected

Hepatitis B (HBV)

  • Transmission: Blood, sexual contact, perinatal transmission from mother to baby
  • Can be acute or chronic - chronic form increases risk of cirrhosis and liver cancer
  • Incubation period: 45-180 days
  • Healthcare workers at high risk due to needle stick injuries

Key Points

  • Vaccine series: 3 doses at 0, 1, and 6 months
  • All newborns should receive first dose within 24 hours of birth

Hepatitis C (HCV)

  • Transmission: Primarily blood-borne through IV drug use, blood transfusions (pre-1992), tattoos
  • Most likely to become chronic (75-85% of cases) leading to cirrhosis and liver cancer
  • Often asymptomatic for years - called "silent epidemic"
  • No vaccine available but curable with direct-acting antiviral medications

Key Points

  • Leading cause of liver transplants in the US
  • All baby boomers (born 1945-1965) should be screened once

Hepatitis D (HDV)

  • Defective virus that can only replicate in presence of Hepatitis B
  • Co-infection with HBV or superinfection in chronic HBV patients
  • Same transmission routes as Hepatitis B
  • Prevention through Hepatitis B vaccination

Hepatitis E (HEV)

  • Similar to Hepatitis A - fecal-oral transmission through contaminated water
  • More common in developing countries with poor sanitation
  • Particularly dangerous in pregnant women - high mortality rate in third trimester
  • Usually self-limiting in healthy individuals

Clinical Manifestations & Assessment

Common Signs & Symptoms

  • Prodromal phase: Fatigue, malaise, anorexia, nausea, vomiting, low-grade fever
  • Icteric phase: Jaundice (yellowing of skin/sclera), dark urine, clay-colored stools
  • Right upper quadrant pain and hepatomegaly
  • Elevated liver enzymes (ALT, AST) and bilirubin levels

Clinical Scenario

A 25-year-old patient presents with fatigue, nausea, and yellowing of the eyes for 1 week. Reports recent travel to Mexico and eating street food. Most likely diagnosis is Hepatitis A due to travel history and fecal-oral transmission route.

Nursing Management & Patient Care

Nursing Interventions

  1. Implement appropriate isolation precautions - Contact precautions for HAV/HEV, Standard precautions for HBV/HCV/HDV
  2. Monitor liver function tests and coagulation studies
  3. Assess for signs of complications (bleeding, encephalopathy)
  4. Provide nutritional support - small frequent meals, avoid alcohol
  5. Educate patient on transmission prevention

Memory Aid: Hepatitis Transmission

"ABCDE"
A = Anal-oral (fecal-oral)
B = Blood/Body fluids
C = Contaminated blood
D = Depends on B
E = Enteric (like A)

Commonly Confused Points

Type Transmission Chronic Form Vaccine
HAV Fecal-oral No Yes
HBV Blood/sexual Yes Yes
HCV Blood Yes (most common) No
HDV Blood (needs HBV) Yes HBV vaccine prevents
HEV Fecal-oral No No (in US)

Quick Check: Which hepatitis types become chronic?

Remember: "BCD" - B, C, and D can become chronic. A and E are acute only.

Study Tips & Key Takeaways

High-Yield NCLEX Points

  • Hepatitis C is the most likely to become chronic and lead to liver transplant
  • Hepatitis B vaccine should be given to all newborns within 24 hours
  • Healthcare workers need Hepatitis B vaccination due to occupational exposure
  • Pregnant women with Hepatitis E have high mortality risk
  • Contact isolation for HAV until 1 week after jaundice onset

Common Pitfalls

  • Don't confuse: HAV is fecal-oral, not blood-borne
  • Remember: HDV cannot exist without HBV
  • HCV has no vaccine but is now curable with medications

Self-Assessment Checklist

  • ☐ Can differentiate transmission routes for each hepatitis type
  • ☐ Know which types become chronic vs. acute only
  • ☐ Understand isolation precautions for each type
  • ☐ Remember vaccination schedules and recommendations
  • ☐ Identify high-risk populations for each type

You've got this! Remember that understanding the differences between hepatitis types is crucial for patient safety and NCLEX success. Focus on transmission routes, chronicity, and prevention strategies. Keep practicing and stay confident!

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