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10_Virus_Meet_the_Microbe - Meet the Microbes Viruses Human...

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Image: HIV viruses budding off of infected lymphocyte, PHIL #10000 Meet the Microbes: Viruses Human Immunodeficiency Virus (HIV) (Depicted in green, budding off infected white blood cell.) From the Virtual Microbiology Classroom on ScienceProfOnline.com
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How Are Viruses Classified? • _____________________ DNA viruses contain DNA as their genetic material. RNA viruses contain RNA as their genetic material. • ______________________ Helical – capsomeres bonded, spiral shape Polyhedral – flat sides Spherical - round Complex – many different shapes Presence or absence of a membranous ____________ surrounding the capsid. Kinds of _________ they attack Bacteriophage Animal Viruses ________ of virus Image: Types of , Viruses National Institutes of Health From the Virtual Microbiology Classroom on ScienceProfOnline.com
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Epidemic of an influenza virus that spreads on a worldwide scale, infecting many people. In contrast to regular seasonal epidemics of influenza, pandemics occur irregularly, with the 1918 Spanish flu the most serious pandemic in recent history. Pandemics can cause high levels of mortality. Spanish flu was responsible for deaths of 50 – 100 million people worldwide. ~ Three influenza pandemics in each century for the last 300 years. Most recent ones: - Asian Flu in 1957 - Hong Kong Flu in 1968 - Swine Flu in 2009 - 2010 Occur when a new strain of influenza virus is transmitted to humans from animals (especially pigs, chickens and ducks). These new strains are unaffected by immunity people may have to older human flu strains, so can spread rapidly. Disease, Please : __________ __________ Caused by enveloped ssRNA animal viruses Images: Swine flu symptoms , CDC; H1N1 virions , CDC From the Virtual Microbiology Classroom on ScienceProfOnline.com
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Caused by enveloped dsDNA animal viruses Name derived from the Greek word herpein ("to creep") , referring to the latent, recurring infections typical of this group. Eight known herpes viruses infect humans (Human herpes viruses 1 - 8). Often cause blistery lesions in the skin and mucous membranes Herpesviruses can exist in latent and actively replicating forms. Antiviral treatments treat active infection but do not cure latent viral disease. The following are herpesviruses: Herpes simplex virus 1: associated with mouth chancre sores (HHV-1 aka HSV-1). Herpes simplex virus 2 : causes genital lesions (HHV-2 aka HSV-1). Varicella zoster: causes chicken pox & shingles (HHV-3 aka VZV). Epstein-Barr virus : causes infectious mononucleosis & is associated with Burkitt's lymphoma (HHV-4 aka EBV). Cytomegalovirus: can be silent or cause brain damage in newborns & blindness in AIDS patients (HHV-5 aka CMV). Roseola: childhood infectious rash & can cause mono-like symptoms in adults (HHV-6 and HHV-7). Kaposi's sarcoma: an AIDS-associated disease caused by one of seven known human cancer viruses (oncoviruses) (HHV-8 and KSHV).
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