1.  Bacteria commonly come in three forms.  Rod-shaped, called bacilli  Spiral, called spirilla or spirochetes  Spherical, called cocci Lactobacilli: rod-shaped Spirochaeta: spiral Enterococci: spherical Spirochaeta: spiral Enterococci: spherical some examples:

2. 1. What parts do hold while carrying the microscope to your lab? 2. Where do you place your specimen? 3. What are the objective lenses? 4. What do you adjust first, to view your specimen? 5. What adjusts the light?

3.  HANDLE WITH CARE! (hold by arm and base)  Start on lowest power first, then work your way to higher power.  ALWAYS adjust at the nosepiece, NOT by turning the objective lens  Use COURSE FOCUS first, then fine focus.  Be mindful of the stage, so that you don’t crush the specimen

4.  Lactobacillus bulgaricus  Lactobacillus acidopholus  Streptococcus thermophilus