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Hepatitis B & c: Transmission Routs; Risk Factors and Prevention

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الكلية كلية الصيدلة     القسم  فرع البايولوجي     المرحلة 2
أستاذ المادة امل طالب عطية نعمة السعدي       29/05/2017 19:34:56
2. Hepatitis B
2-1. Description
Caused by Hepatitis B Virus(HBV), have both acute and chronic forms. The transmission routes include blood(sharing syringes in intravenous drug use), unsanitary tattoos, sexually, breast feeding and may be by transplacental crossing. A vaccine is available that will prevent infection from hepatitis B for life. The complications of chronic hepatitis B are cirrhosis, and hepatocellular carcinoma.
Vertical transmission is a significant contributor of new
HBV cases each year, with 35–50% of transmission from
mother to neonate. Risk of infection is highest among intravenous drug users, individuals with high-risk sexual behaviors, healthcare workers, individuals with a history of multiple transfusions, organ transplant patients, dialysis patients and newborns infected during the birthing process.Vertical transmission occurs largely via a neonate’s exposure to maternal blood and vaginal secretions during birth.

3. Hepatitis C
3-1. Description
Caused by Hepatitis C Virus (HCV) which can be transmitted through contact with blood, sexual contact and through the placenta. HCV usually leads to chronic hepatitis which usually remains asymptomatic for decades. Patients with hepatitis C are susceptible to severe hepatitis either hepatitis A or B, so all persons with hepatitis C should be immunized against hepatitis A and hepatitis B.The genotype of this virus is the primary determinant of the rate of response to the treatment. Chronic hepatitis C is a major cause of liver cirrhosis and hepatocellular carcinoma. It is a common medical reason for liver transplantation due to its severe complications.
Most chronic carriers of hepatitis C are unaware of their infection status. The most common mode of transmission of hepatitis C virus is exposure to blood products via blood transfusions and intravenous drug injection. A history of intravenous drug injection is the most important risk factor for chronic hepatitis C. Other susceptible populations include individuals with high-risk sexual behavior, infants of infected mothers, and healthcare workers.


المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .
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