BIOL 2900 Lecture Notes - Lecture 9: Intracellular Parasite, 1918 Flu Pandemic, Poliomyelitis
29 Sep 2017
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Midterm 2 next week 50mcq same location (everything until the end of week 8) Viruses are the most common cause of acute infections in human. Rubella: can affect embryo during 1st trimester, mental, 25% with schizophrenia from infected mothers. 1892: dmitri iwanowski showed that extracts from diseased tobacco plants can transmit disease to other plants by infectious agents smaller than a bacteria. Virus-host equilibrium: natural evolution of a microbe operates on its spreading capacity, not its ability to cause a disease, polio, 3700bc ancient egypt typical clinical signs of paralytic poliomyelitis. Influenza 1918: following years, virus acquired mutations to become less aggressive, most severe viral disease: failure of virus to adapt to its host. Dna or rna; can be single or double stranded. Extensive synthesis of atp, vitamins, lipids, nucleic acids, etc. Diversity of viruses: highly diverse in overall morphology and in the nature of their genetic material, different method of replication, different structure and size, host range.
