PPT-Herpesviruses & Hepatitis viruses

Prof Dr Dalya Basil Introduction The herpesvirus family contains several of the most important human viral pathogens Clinically the herpesviruses. The dis eases that these viruses cause have been described but their comparative taxonomy and host ranges require additional study All of these DNA viruses are classified in the family Herpesviridae but they belong to various taxonomic sub families History . In 1963, Dr Baruch . Blumberg. accidentally discovered an antigen that detected the presence of hepatitis B in blood samples.. Dr . Blumberg. and his team identified a strange antigen from a blood sample of an Austrian Aborigine.. VOCABULARY. Virus. Capsid. Envelope. Human . Immunodeficiency Virus (HIV. ). Influenza. Lytic Cycle. Lysogenic Cycle. Lysis. Retrovirus. Prerequisite questions. What are the eight characteristics which all living things have in common. . . The process of transfer of virus into host is referred as . TRANSMISSION. and this is an important step in the life cycle of viruses.. Person to person infections are said to be . HORIZONTAL. . : inflammation of liver; presence of inflammatory cells in organ tissue. . Pathogenesis: Immune response.. Acute Viral Hepatitis. : symptoms last less than 6 months. Chronic Hepatitis. : Inflammation of liver for at least 6 months. DR MONIKA RAJANI . ASSOCIATE PROFESSOR ,. DEPT OF MICROBIOLOGY. CIMSH ,LKO. INTRODUCTION. Viral hepatitis . refers to primary infection of liver caused by . heterogenous. group of hepatitis viruses which currently consist of . Scenario. Confirmed. . hepatitis. . A*. . AND…. Classification. Rationale. Hepatitis. . C. . virus. . (HCV). . test. . conversion. *. . documented. Confirmed. . acute. . hepatitis. . C. A. “. Infectious”. “. Serum”. Viral hepatitis. Enterically. transmitted. Parenterally. transmitted. F, G, TTV. ? other. E. NANB. B. D. C. Viral Hepatitis - Historical Perspectives. . Source of. Lec. : 4. Non-enveloped DNA Viruses. Non-enveloped . viruses are surrounded by a protein coating, commonly referred to as a capsid. The capsid does the job of attaching to host cells. .. Non-enveloped . (. Persistent Human Viruses. ). 1- Large family of viruses 150–200 nm in diameter. . 2-The . nucleocapsid. is 100 nm in diameter, with . cubic symmetry . and 162 . capsomeres. , surrounded by a lipid-containing envelope. . ��HEPATITIS A��Page of s there a vaccine for hepatitis A?Yes, hepatitis A vaccine is recommended for all children at 12 months of age. Anyone 12 months of age and older who In Indiana, the 10-year trend of hepatitis A decreased from 329 cases in 1997 to 33 cases in 2006. Many cases have unknown exposures, while some reported traveling internationally. In A in an element What else do we need to know?Inform your immunization provider if you or your child has any health problems or allergies. Your immunization provider will give you a record of you or your child’s : . Identify hepatitis viruses regarding their structure , epidemiology and pathogenesis of the disease and prevention methods.. Recognize the important serological makers during various stages of Hepatitis B..