Lab: Bacteria Flashcards Preview

Microbiology > Lab: Bacteria > Flashcards

Flashcards in Lab: Bacteria Deck (52):
0

What is the morphology of E. coli?

Bacilli

1

Gram stain of E. coli

Gram (-)

2

Colony appearance of E. coli

Beige colonies

3

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"

4

What's the morphology of S. aureus?

Cocci

5

Gram stain of S. aureus

Gram +

6

Colony appearance of S. aureus

Golden yellow

7

Details of S. aureus

- golden grape bunches
- normal part of skin flora but typically hear about MRSA
- staph typically blamed for Strep infections

8

Morphology of S. mutans

Cocci

9

Gram stain of S. mutans

Gram +

10

Colony appearance of S. mutans

Opaque colonies

11

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

12

Morphology of P. hauseri

Bacilli

13

Gram stain of P. hauseri

Gram -

14

Colony appearance of P. hauseri

Opaque colonies

15

Details of P. hauseri

- highly motile
- found in intestines of humans and animals, soil and water
- known to cause UTIs

16

Morphology of B. cereus

Bacilli

17

Gram stain of B. cereus

Gram +

18

Colony appearance of B. cereus

Fluffy white colonies

19

Details of B. cereus

- often used as probiotic for animals
- harmless except for strains that cause fried rice syndrome
- can produce endospores

20

Morphology of B. megaterium

Bacilli

21

Gram stain of B. megaterium

Gram +

22

Colony appearance of B. megaterium

White with ruffled edges

23

Details of B. megaterium

- one of largest bacteria in terms of size
- naturally produces penicillin amidase
- can produce spores

24

Morphology of B. subtilis

Bacilli

25

Gram stain of B. subtilis

Gram +

26

Colony appearance of B. subtilis

Dull, tan, raised, wrinkled edges

27

Details of B. subtilis

- found in soil and vegetation
- model organism for the study of endospore formation
- can be used as fungicide
- naturally produces new phospholipid antibiotic
- degrades TNT

28

Morphology of K. rosea

Cocci

29

Gram stain of K. rosea

Gram +

30

Colony appearance of K. rosea

Pink colonies

31

Details of K. rosea

- aka Micrococcus roseus
- found in freshwater, saltwater and soil
- chromogenesis at 25 to form pink colonies
- fastidious

32

Morphology of M. luteus

Cocci

33

Gram stain of M. luteus

Gram +

34

Colony appearance of M. luteus

Yellow colonies

35

Details of M. luteus

- aka Kocuria rhizophila
- typical soil bacterium
- threat to immunocompromised individuals
- chromogenesis at 25 to form yellow colonies

36

Morphology of S. marcescens

Bacilli

37

Gram stain of S. marcescens

Gram -

38

Colony appearance of S. marcescens

Red colonies

39

Details of S. marcescens

- produces prodigiosin at 25 giving red appearance
- very ubiquitous
- can be pathogen (UTI and catheter)
- US and UK tested effects by spraying
- church wafers

40

Morphology of P. aeruginosa

Bacilli

41

Gram stain of P. aeruginosa

Gram -

42

Colony appearance of P. aeruginosa

Opaque green/blue colonies

43

Details of P. aeruginosa

- ubiquitous human and plant pathogen
- produces pyocyanin (blue-green) at 37
- loves to be in biofilms
- CF and burn patients

44

Morphology of E. faecalis

Cocci

45

Gram stain of E. faecalis

Gram +

46

Colony appearance of of E. faecalis

Opaque colonies

47

Details of E. faecalis

- typical GI bacterium
- found in cosmetics and hygienic chemicals
- ability to spoil sap and syrup
- part of Enterobacteriaceae family

48

Morphology of P. phosphoreum

Bacilli

49

Gram stain of P. phosphoreum

Gram -

50

Colony appearance of P. phosphoreum

Blue-green glowing colonies

51

Details of P. phosphoreum

- highly motile
- symbiotic, often found in deep sea fish
- used to assess biological toxicity within a system