Ch. 19

1
Ch. 19 Bacteria Notes
2
Review

• Kingdom Eubacteria and Archaebacteria Old
  Kingdom Monera
• Unicellular
• Prokaryotic, no cellular membranes, no nucleus
• Auto and Heterotrophic

3
Bacteria Identification

• Shape
• Sphere-Shape (coccus)
• Ex. Strep Throat (streptococcus), pneumonia
  (diplococcus), staph (staphylococcus)

4

• Rod-Shaped (bacillus)
• Ex. Typhoid fever (caused by salmonella Boil
  it, peel it, cook it, or FORGET IT!
• Transmitted by ingestion of food or water
  contaminated with feces of infected people.
  Typhoid Mary 36 years quarantined!),
• Botulism (home canned foods or bad seal on canned
  foods.)

5

• Spiral-Shaped (spirillum)
• Ex. Syphilis

Congenital syphilis (mom gives it to fetus in
utero.)
6
More types of syphilis (secondary).
7
(No Transcript)
8
More Bacteria Identification

• Cell Wall (chemical nature) can see the wall by
  gram-staining!
• Take-up Crystal Violet (purple) Gram Positive
• Take-up Safranine (red) Gram Negative

9
ID Cont.

• Bacterial Movement
• Flagella tail
• Glide along slime (they make this themselves)
• Some dont move!

10
and the last way to Identify bacteria

• Oxygen Use
• Require Oxygen AEROBIC
• NO Oxygen - ANAEROBIC

11
Growth and Reproduction

• Bacteria reproduce in three different ways
• 1. Binary Fission bacteria double in size,
  double DNA and divide in half (asexual
  reproduction)

12
Growth and Reproduction

• 2. Conjugation a hollow bridge forms between
  two bacteria cells and they exchange genetic
  information (sexual reproduction)

13
Growth and Reproduction

• 3. Spore formation when conditions are bad,
  bacteria form endospores which lay dormant until
  conditions get better for growth.