Medicine an Surgery notes

Apr 25th, 2015
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Viral hepatitiskibaruoutlineAt end of the session the student shouldbe able to Outline the causes of viral hepatitis Describe theclinical featuresdiagnosistreatmentprognosis of hepatitis A infectionintroductionViral hepatitis is a major healthproblem in developing and developedcountriesAetiologyThe six hepatotropic viruses are aheterogeneous group that causesimilar acute clinical illnessHBV is a DNA virusHAV, HCV, HDV, HEV, and HGV areRNA viruses representing fourdifferent familiesother viruses can cause hepatitis asone component of a multisystemdisease includingherpes simplex virus (HSV)cytomegalovirus (CMV)Epstein-Barr virusvaricella-zoster virushuman immunodeficiency virus (HIV)rubellaadenovirusesenterovirusesparvovirus B19arboviruses.Effects of infectionsHAV and HEV are not known to causechronic illnessHBV, HCV, and HDV viruses cancause important morbidity andmortality through chronic infections.HGV can cause chronic infections butwith little morbidity or mortality yetreported.epidemiologyIn the United States, HAV appears tocause most cases of hepatitis inchildren. HBV accounts for about one third ofsymptomatic cases in children HCV is found in approximately 20%.HDV, which occurs only in thepresence of HBV, occurs in only asmall percentage of children HEV has not been reported in child

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