Lab: Bacteria Flashcards
(52 cards)
Gram stain of E. coli
Gram (-)
What is the morphology of E. coli?
Bacilli
Colony appearance of E. coli
Beige colonies
Details of E. coli
- most commonly worked with bacteria
- most strains harmless, typically hear about O157:H7 that causes food poisoning
- ubiquitous
- part of Enterobacteriaceae family
- molecular “workhorse”
What’s the morphology of S. aureus?
Cocci
Gram stain of S. aureus
Gram +
Colony appearance of S. aureus
Golden yellow
Details of S. aureus
- golden grape bunches
- normal part of skin flora but typically hear about MRSA
- staph typically blamed for Strep infections
Morphology of S. mutans
Cocci
Gram stain of S. mutans
Gram +
Colony appearance of S. mutans
Opaque colonies
Details of S. mutans
- normal part of oral flora
- responsible for carb metabolism thus creating an acidic environment that contributes to dental caries
- forms dental biofilms
Morphology of P. hauseri
Bacilli
Gram stain of P. hauseri
Gram -
Colony appearance of P. hauseri
Opaque colonies
Details of P. hauseri
- highly motile
- found in intestines of humans and animals, soil and water
- known to cause UTIs
Morphology of B. cereus
Bacilli
Gram stain of B. cereus
Gram +
Colony appearance of B. cereus
Fluffy white colonies
Details of B. cereus
- often used as probiotic for animals
- harmless except for strains that cause fried rice syndrome
- can produce endospores
Morphology of B. megaterium
Bacilli
Gram stain of B. megaterium
Gram +
Colony appearance of B. megaterium
White with ruffled edges
Details of B. megaterium
- one of largest bacteria in terms of size
- naturally produces penicillin amidase
- can produce spores