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One square inch of skin contains more than a half a million bacteria Lactobacillus acidophilis lacto = milk bacillus = rod shaped philus= love of Streptococcus pyogenes strepto = in chains coccus = round shaped Streptococcus pyogenes Bacteria Number of cells: Unicellular Nucleus: No Reproduction: Fission- a form of asexual reproduction Sexual Virus No cells; not living No because it has no cells Invades a host cell and takes over the cell causing it to make copies of the viral DNA. Destroys the host cell releasing new viruses. Can cause disease?: Yes Yes Size: Larger (1000 nanometer) 1 nm = one billionth of m Smaller (20 – 400 nm) Antibiotics Vaccines prevent the spread and antiviral medications help to slow reproduction but can not stop it completely. How is it treated?: Shape: Bacterial Infections Viral Diseases Pneumonia Polio Strept throat [chains] Measles Staph Infection [clusters] Rabies Food Poisoning Chicken Pox Scarlet/Rheumatic fever Common Cold/Sinus discomfort Flu/Cold Sore Tetanus Hepatitis Tuberculosis HIV The virus is about to attack the bacterium. Ebola The virus injects its genetic material into the bacterium. The bacterium explodes after it is forced to make copies of the virus! http://www.youtube.com/watch?v=Rpj0emEGShQ 400 x- cocci shaped 400 x- cocci shaped but in a sheath causing them appear rod shaped - Produce food in lakes and ponds - In large amounts can cause death to life in lake due to consuming all oxygen 99% of Bacteria are helpful: help with digestion, used to make food, break down oil spills, purify water at sewage treatment plants 90% of the cells in/on your body are bacteria. Scientists estimate bacteria produce nearly ½ of oxygen found in atmosphere One square inch of skin contains more than a half a million bacteria