5. VIRUS AND DISEASE (1).ppt

B diseases caused by the herpes family

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VI. B. Diseases Caused by the Herpes Family Cytomegalovirus Mild symptoms in otherwise healthy individuals Major complications Miscarriages when contracted during pregnancy Severe infections in AIDS patients Major cause of blindness in AIDS patients
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VI. C. Viral Hepatitis Hepatitis A Also known as: Infectious hepatitis Short-incubation hepatitis Viral Properties Picornavirus Family Small nonenveloped RNA viruses Family includes common cold (rhinovirus) & polio viruses
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VI. C. Viral Hepatitis Hepatitis A (cont.) Transmission: Virus particles are present in the stool Fecal-oral route via contaminated food or water Saliva contact, sexual contact, and arthropods also have been implicated
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VI. C. Viral Hepatitis Hepatitis A (cont.) Symptoms: Two to four week incubation period Nausea, vomiting, fever Abdominal pain Jaundice in many but not all cases Duration usually several weeks
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VI. C. Viral Hepatitis Hepatitis A (cont.) Treatment & Prevention: Prolonged rest Hepatitis A Immune Globulin Hepatitis A vaccine
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VI. C. Viral Hepatitis Hepatitis B Also known as: Serum hepatitis Long-incubation hepatitis
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VI. C. Viral Hepatitis Hepatitis B (cont.) Viral properties: Hepadnavirus family Nucleocapsid consists of DNA surrounded by hepatitis B core antigen (HBcAg) The core is surrounded by a lipoprotein envelope containing the hepatitis B surface antigen (HBsAg) The virus has also been called the Dane particle Large amounts of excess HBsAg are found in the serum & may be detected serologically
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VI. C. Viral Hepatitis Hepatitis B (cont.) Transmission: Contact with infected body fluids Blood, blood products, semen, vaginal secretions (urine, saliva also implicated)
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VI. C. Viral Hepatitis Hepatitis B (cont.) Symptoms: Incubation period: four weeks - six months Nausea, fever Dark urine & clay-colored stools Abdominal tenderness Jaundice Duration of symptoms: 3 - 4 months About 10% of patients remain carriers for several months
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VI. C. Viral Hepatitis Hepatitis B (cont.) Treatment & prevention Hepatitis B Immune Globulin Hepatitis B vaccination
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VI. C. Viral Hepatitis Non-A non-B (NANB) Hepatitis Hepatitis C NANB serum hepatitis Enveloped virus of the Flavivirus family Transmission & symptoms similar to B Delta hepatitis A small defective RNA virus that requires coinfection with Hepatitis B to replicate Co-transmitted with Hepatitis B
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VI. C.
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  • Fall '19
  • Immunodeficiency

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