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Related Concept Videos

Hepatitis01:25

Hepatitis

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Hepatitis is an inflammatory condition of the liver most commonly caused by hepatotropic viruses (A–E), though non-infectious causes such as alcohol and drugs also exist.Hepatitis AHepatitis A virus (HAV) is a non-enveloped RNA virus of the Picornaviridae family. It is primarily transmitted via the fecal-oral route, typically through ingestion of contaminated food or water. After ingestion, HAV enters the bloodstream through the oropharynx or intestinal epithelium and reaches the liver.
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Effect of Hepatic Disease on Pharmacokinetics: Pathophysiologic Assessment and Liver Function Test01:22

Effect of Hepatic Disease on Pharmacokinetics: Pathophysiologic Assessment and Liver Function Test

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In clinical practice, the direct measurement of hepatic blood flow to evaluate liver function presents significant challenges due to the intricate and specialized nature of the necessary techniques. Consequently, healthcare professionals often rely on empirical estimates derived from thorough patient examinations and liver function tests to gauge liver health. Among the tools at their disposal, the Child–Pugh and MELD scoring systems stand out for their ability to categorize and assess...
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Pulmonary Tuberculosis I01:29

Pulmonary Tuberculosis I

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Tuberculosis, often called TB, is a contagious illness primarily caused by Mycobacterium tuberculosis. It mainly affects the lung parenchyma but can also impact other body parts.
Causative Organism
The primary infectious agent causing tuberculosis is Mycobacterium tuberculosis, a slow-growing, acid-fast, aerobic rod that exhibits sensitivity to heat and ultraviolet light. Instances of Mycobacterium bovis and Mycobacterium avium contributing to the development of TB infection are rare.
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Effect of Hepatic Disease on Pharmacokinetics: Drug Dosing and Hepatic Blood Flow01:26

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Chronic liver disease significantly impacts drug metabolism due to alterations in hepatic blood flow and enzyme accessibility. This disruption affects the body's pharmacokinetics—the movement and processing of drugs within the system. Key enzymes crucial for metabolizing medications become less accessible, changing how drugs are processed and utilized. Furthermore, liver disease influences the synthesis of plasma proteins, such as albumin and globulins, which play critical roles in drug...
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Diseases of the Liver and Gallbladder01:26

Diseases of the Liver and Gallbladder

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Liver and gallbladder diseases are a significant health concern, with prominent conditions including cirrhosis, hepatitis, non-alcoholic fatty liver disease (NAFLD), and gallstones. Jaundice is a common manifestation of liver and biliary disease.
Cirrhosis is characterized by the scarring of hepatic lobules in the liver, which are replaced by fibrous tissue, affecting the liver's normal functioning. NAFLD, on the other hand, is caused by an excessive build-up of fat in the liver, not...
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Hepatic Drug Excretion: Influencing Factors01:16

Hepatic Drug Excretion: Influencing Factors

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The biliary system of the liver, crucial for bile secretion and drug excretion, comprises intrahepatic bile ducts that merge to form the common hepatic duct. This duct, carrying hepatic bile, combines with the cystic duct, draining the gallbladder and forming the common bile duct, which empties into the duodenum. Bile, produced by hepatic cells lining the bile canaliculi, is composed primarily of water, bile salts, pigments, electrolytes, and lesser amounts of cholesterol and fatty acids. Bile...
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Enhanced natural killer cell activity is found in exposed uninfected recipients of hepatitis C-contaminated blood.

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Hepatitis in alcohol and drug misusers: practical issues.

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Viral hepatitis (HBV and HCV) affects UK intravenous drug users and alcohol misusers. Screening and vaccination for HBV, alongside monitoring and specialist referral for HBV/HCV, are crucial for managing this public health issue.

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Area of Science:

  • Hepatology
  • Infectious Diseases
  • Public Health

Background:

  • Viral hepatitis, specifically Hepatitis B virus (HBV) and Hepatitis C virus (HCV), poses a significant health challenge within the UK's population of intravenous drug users (IVDUs) and individuals with alcohol misuse issues.
  • These infections can lead to severe liver damage and complications, necessitating targeted screening and management strategies.

Purpose of the Study:

  • To outline essential screening, vaccination, and referral protocols for viral hepatitis (HBV and HCV) in at-risk populations.
  • To discuss current and emerging treatment modalities for chronic viral hepatitis.

Main Methods:

  • The study emphasizes screening for HBV and HCV infection in patients attending drug rehabilitation clinics.
  • Recommendations include HBV vaccination for susceptible individuals (HBcAb negative) and liver function tests (LFTs) with specialist referral for those positive for HBsAg or HCV antibody.
  • Current management focuses on risk behavior modification and identifying suitable candidates for antiviral therapy.

Main Results:

  • Screening identifies individuals with HBV and HCV infections, allowing for timely intervention.
  • Vaccination against HBV is recommended for those without prior exposure.
  • Referral to specialist liver clinics ensures comprehensive evaluation and management for positive cases.

Conclusions:

  • Proactive screening, vaccination, and specialized care are vital for managing viral hepatitis in IVDUs and alcohol misusers.
  • While interferon therapy shows efficacy, its cost and monitoring requirements are considerable.
  • Advancements in antiviral agents and therapeutic vaccines are anticipated to significantly improve future treatment outcomes for chronic viral hepatitis.