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Flashcards in MCQ tests revision Deck (31):
1

why cant CAMP test be incubated anaerobically?

some groupA steptococci might show positive

2

positive CAMP reslt

enhanced haemolysis arrow head beta haemolysis shown
steptococcus agalactiae

3

negative CAMp result

strep pygoens
beta heamolysis without enhanced arrow head formatioj

4

principle of CAMP test

looks for production of diffusable extracellular haemolytic heat stable protein CAMP factor causing enhanced lyss of red blood cells

5

principle of catalase test

cataase decomposes hydrogen peroxide

6

positive result for catalase

evevescence
gram positive cocci
staphylococcus is positive
bacillus is neg

7

negative catalse test

streptococcus and enterococcus
clostridium

8

principle of coagulase

coagulase reacts with plasma added forming a clot

9

coagulase pos

staph aureus

10

principle of citrate test

test looking for raise in Ph showing bacteria is using citrate as its carbon source

11

citrate positive

media blue
klenbseilla
proteus

12

citrate neg

media green
E.coli
shigella
salmoella
yerinia ernterociilitia

13

sugar fermentation test principle

determine iss bacteria can fermemnt specfic carbon
can differntiate neisera from morexella

14

positive sugar fermentation test

yellow colour
ecoli

15

negative sugar fermentation test

red colour
p. aerunginsa

16

which bacteria will be lecithin positive

c. perfringes and staphylococcus

17

novobiochin test s.epideridis

inhibited, so sensitive to the antibiotic

18

novobiocin test s.saobrhohyticus

resitant to the antibiotic

19

steptococci ressult with optochochin

slighty inhibited so largely resitant

20

principle of oxidase test

detects cytochome oxidase

21

oxidase pos

PVNCH
psudomonas
virbsio cholera
neiseriia
campycolbactera
helicobaster, haemophilus
PURPLE COLOUR

22

alpha haemolysis

partial
grey/green colour

23

beta haemolysis

complete clearing

24

gammae heamloysis

no change

25

glucose fermemtner abcteria example

E.coli

26

glucose oxidiser example

psudomnonas aeurongisa

27

what do gram negative nabcteria have in their cell wall

extra layer of cells called outer membrane or LPS lipopoly saccharised

28

strepotcoccus group A

strep pyonges

29

streptococcus group B

s. agalactiacse

30

step group D

enterococcus

31

strep group C

strep/ dysgalactiase