PPT-Virus structure Lecture Two

2 nd stage Viruses have genome either DNA or RNA which is doublestranded ds or singlestranded ss Virions can be categorized into four groups according to their structure icosahedral enveloped naked and helical enveloped naked. 30pm 730pm 730pm 730pm Hold Your Applause Inventing and Reinventing the C lassical Concert Hold Your Applause Inventing and Reinventing the C lassical Concert Hold Your Applause Inventing and Reinventing the C lassical Concert Hold Your Applause I Charles J. Russell, PhD. postdoc: Crystal Burke, PhD. Funding: NIAID R01AI083370. HPIV1, HPIV2, HPIV3. leading cause of pediatric hospitalization (21,000/. yr. in USA). . virtually all infected by age 5; reinfections common but usually less severe. PlatformQHealth. Joanne Cono, MD, ScM. Director. Office of Science Quality. Office of the Director. Centers for Disease Control and Prevention. April 6, 2016. Zika Virus Overview. 2. Zika Virus. Single stranded RNA Virus. Lecture . 4: Malware. CS3235 Lecture 4. 1. Review of Lecture 3. AES. Public-key cryptosystem: RSA. Application of cryptography. Cryptographic hash functions. Key exchange. Digital signatures. Certificates. modified from slides of . Lawrie. Brown. Malware. [NIST05] defines malware as:. “a program that is inserted into a system, usually covertly, with the intent of compromising the . confidentiality. , . Viruses are not alive. A virus in an obligate intracellular parasite. Requires host cell to reproduce. Can be seen at magnifications provided by the electron microscope (they are microscopic). Characteristics of Viruses. HIV1 and slower to progress to AIDS.. Most cases are due to type1.. Modes of transmission. 1-sexual.. 2- perinatal.. 3-parenteral(occupational and intravenous drug injection).. 4- blood transfusion.. Here are major advantages of steel structure building including costing, safety, designs and uses. Explore here! By: Maddy Connell, Ava . Taurino. , and Shane Landue. Overview .  What is a virus?.  Structures of viruses.  How viruses reproduce.  Cells infected by viruses.  Diseases caused by RNA viruses.  The Lytic Cycle. RNA virus. of the family . Orthomyxoviridae. that is responsible for the infectious disease . influenza. (or most commonly referred to as flu) in birds, various mammals (such as pigs) and humans. Typically, influenza is characterized by fever, sore throat, chills and other non-specific symptoms, it is a much more severe disease. It is spread around the world in seasonal epidemics and according to World Health Organization, these annual epidemics result in about three to five million cases of severe illness, and about 250 000 to 500 000 deaths.. Proteins are biopolymers, made of the 20 L- . α. -amino acids linked by peptide bonds.. Polypeptide backbone is a repeating sequence of. . N-C-C-N-C-C…. The side chain or R group is not a part of the backbone or the peptide bond.. . Outside . their host cells, viruses survive as . virus particles. , also known as . virions. . The . virion. is a . gene delivery . system; it contains the virus genome, and . its functions . are to protect the genome and to aid its . Viruses are very small – smaller than the smallest cell.. They are usually surrounded by a capsid of proteins.. For replication, viruses rely on their host cells . ie. ., the cells they infect.. Most viruses exhibit a limited host range- they typically infect only specific types of cells of one host species.. Topics. Week l:. -Introduction and General characters of viruses. . (History ,definition, and importance of study). . Viral . structure. Virus . structure and morphology. composition .