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Hepatitis A virus

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  1.      HEPATITIS A VIRUS ·        HAV causes infectious hepatitis ·        Spread by the fecal-oral route . ·        Result from consumption of contaminated water, shellfish, or other food. ·        Picornavirus - a new genus Hepa rna virus ·        Long incubation period - 15 to 40 days . Mode of Transmission ·        Sure, here are the rephrased sentences: ·        Contaminated water, food, and unclean hands are common means of virus transmission. ·        The virus is excreted in significant quantities through feces and is primarily disseminated through the fecal-oral route. ·        Shellfish, particularly clams, oysters, and mussels, serve as significant sources of t...
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Chicken Pox - Varicella Zoster Virus

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  VARICELLA-ZOSTER VIRUS ·        VZV causes chickenpox (varicella) upon recurrence, and causes herpes zoster, or shingles . ·        As an alphaherpesvirus, VZV shares many characteristics with HSV. ·        Causes Clinical chicken pox (primary infection). ·        90% of cases before age 10, peak incidence 2-8 years. ·        Recurrent infection - shingles (herpes zoster) in adults. ·        VZV is seen worldwide and is highly infectious, ·        Human is the only natural host of the virus. 1. Virus transmission and Structure ·        Virus entry through inhalation – airborne transmission. ·        Direct contact. ·        Vesicle fluids. ·        Viral ...
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