Mo W 02
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  • MAY 20
  • MAY 21

Mo W 02 Mo W 02 Presentation Transcript

  • 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
  • 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
  • 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