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Mo W 02

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  • MAY 20
  • MAY 21
  • Transcript

    • 1. Bacillus subtilis
      • Gram +
      • Rod, chains – double-stranded helix, endospores, multiple flagella
      • Soil habitat
      • Source of Bacitracin antibiotic, other antibiotics
      • Obligate aerobe
      • Nonpathogenic
      • Decomposer, few strains cause food rot
    • 2. Streptococcus pyogenes
      • Gram +, group A antigen
      • Round (coccus, chains)
      • “ Normal” nonpathogenic flora of respiratory tract
      • Facultative anaerobe
      • Pathogenic strains can cause:
        • Necrotizing fasciitis, scarlet fever, impetigo, rheumatic fever
      • Treated with antibiotics: penicillin, others
        • Necrotizing fasciitis may also require surgical removal of infected tissues.
      http://textbookofbacteriology.net/themicrobialworld/NormalFlora.html Kenneth Todar
    • 3. Rubeola Virus
      • Paramyxoviridae: single-stranded (ss) RNA, enveloped sphere
      • Measles: fever (104 o F), conjunctivitis, cough, white spots inside the cheek, rash spreading from the face to the arms and legs
      • Typically untreated, allowed to run course, lasts 7-10 days
        • 1/1000 suffer permanent brain damage
      • Vaccination in early childhood, MMR
      http://virology-online.com/viruses/MEASLES.htm http://www.microbiologybytes.com/blog/ http://www.thisamericanlife.org/Radio_Episode.aspx?sched=1275 Stream this “radio” program (skip to minute 13) to hear about a recent measles outbreak in the US - optional

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