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  • 1. Harmful & Helpful BacteriaWhen you eat a piece of candy, do you notice a coatingdeveloping on your teeth?(mossy). This slime is produced byStreptococcus mutans when sugar is present in your mouth.Sticks to other bacteria in your mouth & this is how plaque begins.
  • 2. Harmful Bacteria-SyphilisSTD’s(-sexually transmitted diseases) caused by bacteriaTreponema pallidum Primary: Chancres-painless sores (2 to 3 weeks after exposure)– sometimes do not see b/c in rectum or cervix Secondary: left untreated; bacteria spreads to bloodstream; skin rash on palms & soles; fever; lesions in mouth, etc. Tertiary : left untreated; brain or CNS*very high in Georgia- marriage blood test not required any more
  • 3. Harmful Bacteria- Gonorrhea• STD’s(-sexually transmitted diseases) caused by bacteria• (Neisseria gonnorrhoeae)• Can affect genital tract, mouth & rectum (women-uterus/cervix)• 75% cases- 15 to 29 year olds• Symptoms 2 to 10 days after infection(some can go months w/o symptoms) a. Women: vaginal bleeding or discharge, painful urination b. Men- *symptoms seen quicker; pus form penis & burning urinationUntreated: affects reproduction, brain, heart*increases risk of getting HIV*usually get another STD, ChlamydiaSome reports say 1 in 130 :
  • 4. Harmful Bacteria-Chlamydia• STD’s(-sexually transmitted diseases) caused by bacteria• Chlamydia trachomatis• *Most common STD in the U.S.• May be acquired jointly with syphilis and/or gonorrhea(screened for all these if you have one)• Untreated: infertility & pelvic infection• Male symptoms: pus from penis/rectum, burning urine• 25% of infected men (1 in 4)- have no symptoms• Female symptoms: only 30% will have symptoms; painful urination , abdominal pain, & discharge• Prevention for all 3 STD’s??
  • 5. Harmful Bacteria- Respiratory• Strep Throat- infection of pharynx with Streptococcus. Spread-nasal or saliva• Sinusitis- inflammation of sinuses(hollow spaces within the bones around your nose)• Pertussis- Whooping Cough-like cold except coughing spells. Bordetella pertussis
  • 6. Harmful Bacteria-• Pneumonia-inflammation of lungs(can be from a bacteria, virus, or fungus).• Conjunctivitis “Pink Eye ”• Infects outermost layer of eye(Conjunctiva)• can be viral(cold) or bacterial(staph or strep), or allergies• Contagious
  • 7. Harmful Bacteria- Digestive• Stomach Virus (24 hour)- most of time it is not a virus but a bacteria from food poisoning.• Botulism- Food poisoning- Clostridium botulinum; endospore, a. infants- don’t give homemade honey ; canning (boil at high temp) b. Pasteurization- heating process to prevent contamination of milk.3. Salmonella enterocolitis- infection in small intestine by Salmonella bacteria. Any food can have it.
  • 8. Harmful Bacteria-Skin• Diaper Rash- bacteria from feces• Scarlet Fever- skin rash- group A streptococci3. Acne- oil blocks & bacteria grow
  • 9. Harmful Bacteria- Toxic Shock Syndrome• Caused by a toxin made by Staphylococcus aureus.• 50% deal with women using super-absorbent tampons (leaving them in long)• Men & children can get- surgery• Go into shock; organ failure
  • 10. Harmful Bacteria-(TB)Tuberculosis• Attacks lungs• Spread through air• Close contact needed• You can be exposed to it but not get the disease• Skin Test
  • 11. Harmful Bacteria- The Plague• Yersinia pestis- in wild rodents/ flea bites• Spread by bites or infected person coughing• Pneumonia or Bubonic
  • 12. Harmful Bacteria- Anthrax• Bacillus anthracis• Spore-forming• Occurs in cattle, sheep, humans• Inhale it or handle contaminated animal products• Symptoms show within 7 days
  • 13. Lyme Disease-Harmful Bacteria• Borrelia burgdorferi- transferred by a deer tick• Skin rash, inflammation, flu-like symptoms
  • 14. Harmful Bacteria- Leprosy• Skin lesions , nerve damage• Mycobacterium• Difficult to transmit; Leper colonies not neccessary• 100 cases a year in U.S.(south, Ca, Hawaii)• Have medicine now
  • 15. • Helpful Bacteria NITROGEN FIXATION:• Some bacteria convert nitrogen gas into nitrates in the soil which is necessary for plant growth• SAPROBES:• Break down dead organic matter
  • 16. Helpful Bacteria- “Probiotics”• FOOD FLAVORINGS:• Food flavors are produced by fermentation, bacterial wastes, etc.• Vinegar, yogurt, butter, cheese, pickles, buttermilk, sauerkraut• ANTIBIOTIC PRODUCTION:• Some bacteria produce antibiotics that will kill other forms of bacteria• Antibiotics kill bacteria only
  • 17. Helpful BacteriaBioremediation – •• help clean-up oil spills• Works in Landfills to break down wastes(including some hazardous wastes)• Waste- water treatment plants
  • 18. Helpful Bacteria- Our body1. Provide Vitamin K (E coli)- clots blood & keeps bones strong2. Keeps invading bacteria, viruses, & yeast in check. Antibiotics can destroy friendly bacteria (women/ yeast infections after taking antibiotics)3. Makes Lactase-enzyme needed to break down dairy products