Oral Diagnosis I Third Year

1. Hepatitis A
Causative Microorganism and mood of transmission.
Caused by the hepatitis A virus (HAV), a Picornavirus; has no enveloped, and contains a
single-stranded RNA. It is transmitted via contaminated food or drinking water. the
incubation period is between two and six weeks.
Diagnosis and consultation.
Diagnosis can be made by the following tests:
 The detection of HAV-specific IgM antibodies in the blood.
 The presence of IgG antibody in the blood means that the acute stage of the
illness is past and the person is immune to further infection. IgG antibody to
HAV is also found in the blood following vaccination.
 The liver enzyme alanine transferase (ALT) is present in the blood at levels
much higher than is normal.
 Hepatitis A virus is present in the blood, (viremia), and feces of infected people
We should consult a medical doctor and virologist.
Hepatitis B
Causative Microorganism and mood of transmission.
Caused by hepatitis B virus (HBV), a member of the Hepadnavirus family. Transmission
of hepatitis B virus results from exposure to infectious blood or body fluids containing
blood.
Diagnosis and consultation.
Detection of hepatitis B virus infection involve serum or blood tests that detect either viral
antigens (proteins produced by the virus) or antibodies produced by the host.
We should consult a medical doctor and virologist.
Oral Manifestations of viral hepatitis.
Abnormal bleeding is associated with hepatitis and significant liver damage. A lechinoid
eruption is also associated with viral hepatitis.