Lecture 5 Flashcards Preview

Microbiology Exam 1 > Lecture 5 > Flashcards

Flashcards in Lecture 5 Deck (51):
1

Name the three basic forms of bacteria

coccus
bacillus
spiral shaped

2

name 3 forms of coccus bacteria

streptococci
staphylococci
Diplococci

3

Name a bacteria that is diplococci

neisseria

4

What do cooci look like?

spheres

5

What do bacilli look like?

rods

6

What form are bacteria in the palisade arrangement?

bacilli

7

Name 6 bacteria which are bacilli

Bacillus
E. Coli
klebsiella
clostridium
corynebacterium
vibrio

8

Which bactera is in the palisade arrangement?

corynebacterium

9

What do streptococci look like?

chains of cocci

10

What do staphylococci look like?

clusters of cocci

11

What does the pallisade arrangement look like?

a picket fence

12

What shape are neisseria?

diplococci

13

What shape is anthrax?

bacillus

14

what shape is e. coli?

bacillus

15

What shape is syphillis?

spirochete

16

What shape is cholera?

vibrio?

17

Vibrio bacteria are of what form?

bacilli

18

What shape is tetnus?

bacilli

19

What shape is diptheria?

palisade arrangement

20

what shape is lyme disease?

spirochete

21

What shape are spirochetes?

spirals, corkscrews

22

Wat is the difference between vibrios and spirochetes regarding their shape?

vibrios do not complete a full revolution of their spiral
spirochetes contain at least one full spiral

23

What form/shape of bacteria is the smallest in volume?

Cocci

24

How big are cocci?

1 micrometer

25

what form/shape of bacteria have the largest volume?

spirochetes

26

What are the average dimensions of a bacilli?

0.5 micrometers x 2 micrometers

27

What are the average dimensions of spirochetes?

.5 micrometers x 1 to 14 micrometers

28

What is the glycocalyx?

outermost wall of bacteria
is non living
extracellular

29

What are the 2 forms the glycocalyx may come in?

slime layer and capsule

30

What bacteria have a slime layer?

staphylococcus aureus

31

What bacteria have a capsule?
(must name all 5)

klebsiella pneumoniae
streptococcus pneumoniae
streptococcus pyogenes
bacillus anthracis
haemophillis influenzae

32

Which is thicker:
a slime layer OR a capsule?

the capsule

33

What type of glycocalyx does nosocomial pneumonia have?

capsule

34

What does haemophillis influenzae cause?

Pneumonia,
meningitus,
AND the flu

35

What is the chemistry of the slime layer?

poly peptide saccharides

36

What 2 factors determine if a slime layer is formed?

Genetics and nutrition

37

What do capsules look like on a colony?

mucus on the plate

38

What does a slime layer look like on a colony?

wet and shiny

39

How do you stain klebsiella to see the capsule under a microscope?

stain the organism with crystal violet then use with india ink

40

What would a properly stained slide look like if you had stained to see the capsule?

black background
purple bacteria
clear capsule

41

What are the 3 levels of identification?

shape/morphology
gram staining
enzymes at the biochemical level

42

What are serovars?

A group of closely related microorganisms distinguished by a characteristic set of antigens

43

What is the significance of serology when making vaccenes?

There are many serovars for the disease you're vaccinating against, but you only really need to include the most common strains in your vaccine

44

What aids the formation of microcolonies?

capsules

45

what is the significance of microcolonies?

only the outer bacteria die off, the inner ones are protected against dryness and chemicals
they are harder for white blood cells to engulf

46

What chemical does streptococcus pyogenes use to hide in the human body?

hyaluronic acid

47

What is the function of hyaluronic acid?

in the human body it keeps our cells stuck together
streptococcus pyogenes uses this to its advantage to camouflage itself in the body

48

Which organism uses hyaluronic acid to hide in the body?

streptococcus pyogenes

49

How do capsules relate to virulence?

organisms with capsules are more virulent

50

Which organism uses its capsule to attach to intubation and catheters?

Klebsiella

51

If a bacteria does not have a glycocalyx is it avirulent?

no
don't lick the sample
if you do it can still infect you