PPT-Virology Introduction to viruses

Viruses consist of a nucleic acid either DNA or RNA associated with proteins encoded by the nucleic acid The virus may also have a lipid bilayer membrane or envelope but this is acquired from the host cell usually by budding through a host cell membrane If a membrane is present it must contain one or more viral proteins to act as . Virology. Biology 516 Fall. Virology. Virology: is . the study of . viruses. . M. icroscopic. , parasitic particles of genetic material contained in a protein . coat.. Viruses . must. be within a host cell to reproduce.. Introduction to viruses . Viruses consist of a nucleic acid (either DNA or RNA) associated with proteins encoded by the nucleic acid. The virus may also have a lipid . bilayer. membrane (or envelope) but this is acquired from the host cell, usually by budding through a host cell membrane. If a membrane is present, it must contain one or more viral proteins to act as . Since the discovery by Enders (1949) that polioviruses could be cultured . in tissue. , cell culture has become a very useful and convenient method for isolating viruses in vitro. Viral isolation in cell culture still remains the "gold standard" for many cultivable viruses . Since the discovery by Enders (1949) that polioviruses could be cultured . in tissue. , cell culture has become a very useful and convenient method for isolating viruses in vitro. Viral isolation in cell culture still remains the "gold standard" for many cultivable viruses . VOCABULARY. Virus. Capsid. Envelope. Human . Immunodeficiency Virus (HIV. ). Influenza. Lytic Cycle. Lysogenic Cycle. Lysis. Retrovirus. Prerequisite questions. What are the eight characteristics which all living things have in common. arboviruses. ) are viruses that can be transmitted to man by arthropod vectors. . Arboviruses. belong to three families:. Togaviruses. . Bunyaviruses. e.g. . Sandfly. Fever. .. Flaviviruses. e.g. Yellow Fever, dengue, Japanese Encephalitis. . Virology lecture 3. . . Dr. . Sadia. . Anjum. Entry of avian . leukosis. virus . (a model, simple, retrovirus). Classically all retroviruses were thought to be pH-independent. More recently ALV has been proposed to require low pH, but in addition to its receptor-induced conformational change. - Classification of viruses . - Replication of viruses . . Virology . Virology: is a branch of science . that deals with viruses and viral . diseases.. Viruses are the smallest infectious. Pass through specially designed filters. . In 1935, W.M Stanley – isolated TM V – find properties of a crystalline solid . . . Virus not a simply protein but nucleoprotein . Its infectious principle is the nucleic acid (RNA/DNA). Department of Microbiology and Immunology. Osaka University Graduate School of Medicine. Japan. Tel: 81-6-879-3780. Research Interest. Studies on viruses . enter into cells, express their genes, amplify the genomes, assemble virus particles and . and strains U l102 and Z29 Z29 Subsequent work has shown that isolates can be discriminated into into 11, 14], which extend across the the (iv) Nucleotide sequence analysis also supports the existence Ori. Disclaimer. The information represents my understanding only so errors and omissions are probably rampant. It has not been vetted or reviewed by faculty. The source is our class notes.. The document can mostly be used forward and backward. I tried to mark questionable stuff with (?). . . By. Prof. Dr. Abdul-Hameed Khalid . Khadhair. . Medical Virology:. - Introduction. - History and Technology Development. - Theories on origin of viruses. - Viruses and virus-like structures. History of Viruses:. Topics. Week l:. -Introduction and General characters of viruses. . (History ,definition, and importance of study). . Viral . structure. Virus . structure and morphology. composition .