Friday, December 7, 2007

Lecture 34, 12/7; Purification

Audio available here.

5 groups. On the test Mon. About 80 diseases that we are going to need to classify
Final – 140 questions and an essay. 150pts
  • • “Immunology” handout
    • o immunodeficiency – cant respond to the antigen. Burton’s disease, DiGeorge syndrome, SCID (sever combined immunodeficiency disease) – food must be autoclaved.
    • o Secondaray immunodeficiency diseases
      • • AID’s
    • o From ummunoppressive agents
      • • Irradiation
      • • Severe burns
    • o Auto-immune diseases - Respond to your own antigens
      • • Systemic Lupus Eritomas (SLE) – lupus. You respond to some of your own antigens
      • • Rheumatoid arthritis
      • • Type I, Type II diabetes
      • • MS
      • • Rheumatic fever
  • • Interleukin-2 (lymphokine, T cell product, CD4 +’s)
    • o 1 lymphokine affects b cells (responsible for antibody’s imunoglobulins). Helps with the proliferation of T cells.
    • o NK’s – natural killers. They are immune surveillance. They go through the body looking for things such as cancer cells (which have unique antigens).
  • • Type I hypersensitivity
    • o Response to pollen is caused by IgE. It causes the degranulation of the mast cells.
  • • Soil
    • o Urea to ammonia by the organism protease (ammonification)
    • o Nitrates – solid fertilizers
    • o Nitrogen fixation – rhizobium and legumes (symbiotic)
      • • Azotobacter and Klebsiella can do fix Nitrogen by themselves
  • • Bacterial photosynthesis – don’t have to know it
  • • Food poisoning and Water poisoning
    • o Don’t see milk borne diseases due to pasturization
    • o salmonella food poisoning
    • o fecal organisms
      • • enterococcus fecaelis
      • • e coli
    • o botulism – poorly canned foods
  • • food intoxication
    • o enterotoxin like staph aereus (fast acting food poisening)
    • o Botulism – get it from homemade canning
    • o Perfringens – associated with turkey
    • o e. coli o157: H7
  • • water purification
    • o Aluminum Potassium Sulfate – a protein precipitate. Mix it up let it coagulate and take the water off the top. It is then run through a sand filter. Microorganisms like to attach to the sand. From there chlorine is added. In places where this filtration process is worse they tend to add more chlorine.
  • • Sewage Treatment
    • o Use organisms to break down organic to inorganic substances
    • o aeration tanks
      • • zoogloea ramigera
    • o From the aeration tanks it is essentially the same process as water purification
  • • Bacterial Food Poisoning
    • o Staph aureus – custard and cream filled pastries and mayonnaise (projectile vomit)
    • o Clostridium perfringens - reheated meat like turkey
    • o Salmonella – poultry and eggs
    • o Clostridium botulism – turns things black. The exotoxin of clostridium is heat labile
  • • Exotoxins that are harmful
    • o Tetnus
    • o Salmonella typhi
    • o Botulism
    • o Neisserhea meningitidis

Thursday, December 6, 2007

Lecture 33, 12/5; Immunology

Here is the audio for this day's lecture.

• Org group exam Dec. 10 8am
• Big Final Wed 7:30. Dec 12
• Portfolio due Friday Dec 14

  • Flesh eating disease
    • Necrotizing fasciitis caused by Streptococcus pyogenes (p551 in text).
  • • 4-s → staphylococcal scolded skin syndrome (p548 in text)
    • staphylococcus aureus
  • • gas gang green
    • clostridium perfringens
  • • Immunology – classification of antibodies (handout from 11/28 titled “Immunology”)
    • IgG – most of the antibody is IgG. It comes from mom through placenta.
    • IGM – the macro antibody. Very large. It is a pintomer (5 IgG’s). Notable because it is the first antibody formed. Soaks up a lot of antigen.
    • IgA – a dimer, two monomers held together. Get it from mothers milk - colostrums. Coats GI tract of infant protecting from diarrhea. Also in other secretions such as saliva and urine. It is the secretory antibody.
    • IgD, IgE – look like IgG. In smaller concentrations. Antibody usually on surface of B cells and helps it recognize antigens. IgE protective against parasitic diseases. It is associated with hypersensitivity. Anaphylactic shock (adverse reaction to penicillin).
  • • Functional classes of antibodies (1st page of “Immunology” handout from 11/28)
    • Opsonins - Antibodies that make the antigen more susceptible to phagocytosis.
    • Antitoxins – antibodies that neutralize antitoxin toxins. We form them in response to a toxoid. Example – tetnus and diptheria. Shot lasts about 10 years
  • • Chemical makeup of IgG – composed of four peptide chains. Two “h” chains. Twice the size of l chains. They are all held together by disulfide bonds. There is some CHO on the H chain. Divalent – two antigen binding sights. An IgM can bind 10, that is why it is one of the first ones produced → it soaks up the antigen and takes it out.
  • • Fate of the foreign antigen (chart on p 5 of “Immunology” handout)
    • Initial or Primary response - IgG
    • Secondary or memory response or Anamnestic response.
  • • T cells mature in the thymus. B cells come from bone marrow.
  • • “The complex network …… defense mechanisms” (p2 from “Immunology” handout)
    • plasma cell - When it differentiates it forms all the immunoglobulins. IgG, IgM, IgD, IgE.
    • “T” helpers help b cells produce antibody’s. CD4 positives
    • Multiple myeloma – too much antibody produced
    • “T” killer. Virus antigen on outside of cell. T killer recognizes the viral antigen and kill the cell that is loaded with viruses.
    • delayed hypersensitivity (another type of T cell) – poisen ivy, TB tests. T cells also produce lymphokines that modulate the immune response. Example of lymphokine is interferon. There are three types of interferon’s; alpha beta antivirul, gamma (modulates reactions), and interleukin (come from leucocytes). We have 65 interleukin produced by different cells.
  • • VACCINES (p.7 of “Immunology” handout)
    • guardisil
    • rototeq – helps babies effected by diarrhea
    • Related Organism
      • • smallpox
    • Killed Organisms – dead suspension of something like:
      • • Cholera, whooping cough, polio (injectable. Discovered by Sulk), Influenza, rabies, typhoid fever, hepatitis A (havrix)
    • Attenuated Organism – living organism that is a strain of a disesease that is not harmful. Developled by Pasteur.
      • • MMR (measles, mumps, rubella), polio (oral), TB-BCG, Varivax (VZV)
    • Acellular (parts of organism)
      • • Capsule (HIB [Heamophilus Influenza Type b]
      • • Pneumovax - capsule of strep pneumonae
      • • Pili - whooping cough, purtussis.
    • Recombanant
      • • Hep. B. - Heptavax/Engerix
    • Toxoids
      • • Diphtheria, tetanus
      • • Havrix – hepatitis A vaccine, inactivated (p8 of “Immunology” handout)
  • • Immunodefiency diseases
    • AIDs
    • A gamma globulin anemia – b cell defect. Cant produce any antibody.
    • T cell defect – if your thymus doesn’t grow. Digeorges syndrome (???not sure??)
    • Severe combined immuno deficiency – b cell and t cell defects. SCID – bubble boy syndrome