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INTRODUCTION Hepatitis is defined simply as injury to liverwort cells and percolation of inflammatory cells into the colored; it is not an uncommon manifestation of a variety of systemic infectious processes (Be atomic piece 18, P. and Daviss G.1991). Hepatitis is an inflammatory state of the liver that may be caused by exposure to toxic chemicals, by autoimmune disease, or by transmittance (Gladwin, M., and Trattler, B. 1995) (Beeson, P. B. and McDermott, W. 1979). The viral infection most comm further associated with hepatic inflammation includes hepatitis A, B, C, D and E (Dienstag, 1998). Since the development of jaundice is a characteristic feature of liver diseases, testing patients sera for the presence of specialised anti-viral antigens or antibodies smoke only make a right diagnosis. Transmission of viral hepatitis is by the fecal-oral route. Blood and secretions (blood, saliva and sperm) can also be contagious. grime needles are a mammoth problem wher ever needles are shared. Most cases of hepatitis are due(p) to viral infections: Hepatitis A, Hepatitis B, Hepatitis C, Hepatitis B with D, Hepatitis E, Hepatitis F virus (existence unknown), Hepatitis G, or GBV-C.

Hepatitis A virus In 1985 Lemon SM reported that Hepatitis A virus (HAV), classified as hepatovirus, is a small, unenveloped symmetrical ribonucleic acid virus, which shares many of the characteristics of the picornavirus family, and is the cause of infectious or epidemic hepatitis inherited by the fecal-oral route. The HAV genome comprises about 7,500 nucleotides of positive sen tiency RNA, which is polyadenylated at the 3! stop and has a polypeptide attached to the 5 end. A single, gargantuan open narration frame (ORF) occupies most of the genome and encodes a polyprotein with a theoretical molecular mass of 2,52,000. The HAV polyprotein is processed to yield the geomorphologic (located at the amino-terminal end) and non-structural viral polypeptides. Many of the features of replication of the picornaviruses have been...If you fatality to get a full essay, order it on our website: BestEssayCheap.com

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