bacteria chapter 24. archaebacteria prokaryotic – single celled prokaryotic – single celled...

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  • BacteriaChapter 24

  • ArchaebacteriaProkaryotic single celledProbably all life's originInclude the extremophiles

  • Extremophiles

    Methanogens produce methane gas, oxygen is poisonous to them ( swamps, sewage, intestines)

  • Extremophiles

    Halophiles salt loving great salt lake etc.

  • Extremophiles

    Thermoacidophiles extreme high temperatures.

  • EUBACTERIA (Bacteria)Come in 3 basic shapesBacilliCoccciSpirilla

  • BacteriaMost bacteria are Heterotrophic get their energy from organic compounds of other organisms.A few are Autotrophic make their own energy from photosynthesis.

  • Bacteria ReproductionBacteria divide by Binary Fission not meiosis (no nucleus).

    Bacteria can also exchange genetic material through conjugation.Movie

  • BACTERIAOne important role of bacteria is Nitrogen Fixing transformation of atmospheric nitrogen (N2) into other forms of nitrogenous compounds that can be used by plants.

  • Gram StainingGram Positive purple retain stain = this means that the bacteria have a thick cell wall and are Gram Negative pink this means that the bacteria have a thin cell wall.Gram Staining can determine toxicidity, reaction to antibacterial drugs and disinfectants.

  • CyanobacteriaBlue Green AlgaeCan be a lot of different color.Population bloom = death (red tides)

  • Genetic RecombinationTransformation Bacteria takes in DNA from its external environmentConjugation bacteria share DNA when they come in contactTransduction a virus obtains a piece of DNA from a Bacteria then spreads the bacteria

  • Diseases caused by BacteriaExotoxin -Toxins that are leaked or secreted out of the bacteria cell and into its host (you and me).

    Endotoxins are generally much less pathogenic than Exotoxins and rarely cause death. Many fevers are caused by endotoxins whereas exotoxins never produce a fever.

  • Diseases caused by Bacteria copy down 3Leprosy (Hansen's Disease) TetanusWhooping Cough Typhoid FeverParatyphoid Fever CholeraPlagueTuberculosisMeningitisBacterial Pneumonia AnthraxBotulismBacterial Dysentery DiarrheaFood Poisoning Gas GangreneSyphilis Diphtheria Gonorrhea Trench FeverTrench Fever InfluenzaTyphus FeverLyme Disease Tooth Decay Scarlet Fever Tonsillitis Food Poisoning Toxic Shock SyndromeRocky Mountain Spotted FeverHuman Monocytic Erhlichiosis Human granulocyticGasteroenteritisPeptic Ulcers

  • STD Bacterial InfectionsNeisseria gonorrhea (causes gonorrhea or gonococcal infection) Chlamydia trachomatis (causes Chlamydia infections) Treponema pallidum (causes syphilis) Haemophilus ducreyi (causes chancroid) Klebsiella granulomatis (previously known as Calymmatobacterium granulomatis causes granuloma inguinale or donovanosis).

  • Bacteria around me?How much bacteria is around us?Where are the most infected areas?How can you reduce your risk for bacteria?

    Cell phone clipSTAPH

  • Antibiotics and Antibiotic ResistanceAntibiotics are drugs that combat Bacteria ex Penicillin.Antibiotic Resistance-Disease -causing microbes that have become resistant to drug therapy are an increasing public health problem. Tuberculosis, gonorrhea, malaria, and childhood ear infections are just a few of the diseases that have become hard to treat with antibiotic drugs.

  • How to reduce resilance.Antimicrobial drugs intended for bacterial infections should not be taken for viral infections such as colds, coughs, or the flu. If your health care provider determines that you do not have a bacterial infection, ask about ways to help relieve your symptoms. Do not pressure your provider to prescribe an antibiotic. Take medicine exactly as your health care provider prescribes. Take the antibiotic until it is gone, even if you are feeling better. Do not save the medication to treat yourself or others later.

  • Useful Bacteria write down 2Helps make some foods Preserve food Keep gut healthy Break down toxins Make soil Billions of years ago they increased oxygen by 20% enabling larger items to live


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