1 / 9

Pathogens : An organism that causes disease. ( Chp . 18/chp.39) see p.550

Pathogens : An organism that causes disease. ( Chp . 18/chp.39) see p.550. Types of Diseases Contagious…if it spreads quickly. Non-communicable Disease : cannot be transmitted from one person to another Heart attach Depression Stroke Hypertension/hypo. Cancer

Rita
Download Presentation

Pathogens : An organism that causes disease. ( Chp . 18/chp.39) see p.550

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Pathogens: An organism that causes disease. (Chp. 18/chp.39) see p.550

  2. Types of Diseases Contagious…if it spreads quickly • Non-communicableDisease: cannot be transmitted from one person to another • Heart attach • Depression • Stroke • Hypertension/hypo. • Cancer • Genetic disorders (only to their children) • Communicable Disease: can spread from one person to another • Diarrhea • Pneumonia • Tuberculosis (TB) • Sexually transmitted diseases (STD’s)

  3. Bacteria • Unicellular and everywhere • Some damage cells and tissues • Others release Toxins: poisons that travel through the body and may cause diseases • There are environmental toxins: Lead and Mercury Other toxins:Botulism> improperly prepare food

  4. Diseases Caused by Bacteria

  5. Viruses:Nonliving..Must have aLivingHost • Consist of genetic material enclosed in a protein coat (Capsid[head], nucleic acid, Sheath, Tail) • Bacteriophage (phage): a virus that infects a bacterium. The virus will attach its legs to a cell and then inject its genetic material into it. The virus takes control of the bacterial cell and directs it to produce viral material. A single infected cell may replicate thousands of viruses.

  6. A typical Bacteriophage, a type of virus Protein coat Attaches to a cell

  7. Viruses Cause…. • HIV • Influenza • Chickenpox • Colds • Measles • Rabies

  8. Viral Replication Cycles p. 478/479 • (1)Lytic Cycle: immediately takes over killing the host cell • (2) Lysogenic Cycle: does not kill host cell immediately integrates its genetic material with the host cell…creates a provirus…..sits dormant….then one day takes over the host

  9. Viral Replication Cycles

More Related