Intro to bacteriology

Question 1

3 uses for gram stain

Answer 1

1. provides basis for empiric antibiotic therapy
2. may indicate the need for lab procedures not normally used (fungi)
3. helps assess adequacy of specimen (look for squam. cells)

Question 2

3 reasons why the gram stain is different in diff. bacteria

Answer 2

1. diffs. in cell wall petidoglycan layer
2. presence of ribonucleate in Gram+ cell walls
3. diffs. in cell wall permeability

Question 3

what will be seen in staphylococcus spp

Answer 3

gram+, cocci in clusters

Question 4

what is special test in staph

Answer 4

coagulase test - aureus will have coagulase in it

Question 5

what will be seen in streptococcus species

Answer 5

gram+ cocci in chains

Question 6

what is special test in strep

Answer 6

hemolysis testing

Question 7

what would be seen in group A streps

Answer 7

beta-hemolytic in short chains

Question 8

what will be seen in strep. pneumonae

Answer 8

gram+ diplococci

Question 9

what will be seen in enterococcus

Answer 9

gram+ cocci in chains

Question 10

what will be seen in cornybacterim

Answer 10

gram+ baccili in V or palisades

Question 11

what will be seen in baccilus

Answer 11

gram+ bacilli in short rods

Question 12

what is special about cornybacterium and bacillus

Answer 12

normal flora that aren’t usually concerned about

Question 13

what is bad bacillus

Answer 13

B. anthracis

Question 14

what will be seen in E.Coli

Answer 14

gram- bacilli

Question 15

what will be seen in haemophilus

Answer 15

gram- coccobacilli

Question 16

what is important haem.

Answer 16

H. Influenza

Question 17

what is seen in Neiseria

Answer 17

gram- diplococci

Question 18

2 important neisseria

Answer 18

N. meningitidis

N. gonorrhoeae

Question 19

what will be seen in clostridium

Answer 19

gram+ bacilli

Question 20

what will be seen in bacteroides

Answer 20

gram- bacilli in thin hairs