enterics 1

Question 1

which of the following is h2s positive

a. citrobacter
b. klebsiella
c. edwardsiella
d. enterobacter

Answer 1

h2s positive
(SPACEd)

S - Salmonella
P - Proteus
A - Arizona
C - citrobacter
Ed - edwaardsiella

Question 2

which of the following is not a h2s positive

a. salmonella
b. citrobacter
c. enterobacter
d. proteus

Answer 2

ans: enterobacter

h2s positive
(SPACEd)

S - Salmonella
P - Proteus
A - Arizona
C - citrobacter
Ed - edwaardsiella

Question 3

which of the following is rapid urease producing

a. citrobacter
b. klebsiella
c. proteus
d. enterobacter

Answer 3

rapid urease
(CKEYS)

C - citrobacter
K - klebsiella
E - enterobacter
y - yersinia
s- serratia

Question 4

fish eye colonies

a. e. coli
b. enterobacter
c. proteus
d. yersinia

Answer 4

FISH EYE COLONIES - ENTEROBACTER

Question 5

what is the favored energy source to many enteric pathogens, but it is not utilized by many other nonpathogenic enteric organisms

a. mannitol
b. carbohydrates
c. glucose
d. fructose

Answer 5

mannitol - energy source for many enteric pathogens

Question 6

capsular antigen on salmonella

a. somatic o
b. flagella antigen
c. vi antigen

Answer 6

VI ag

Question 7

a biochemical test to determine an oraganism’s ability to liquefy this substrances

a. catalase
b. coagulase
c. hippurate hydrolysis
d. gelatin hydrolysis

Answer 7

gelatin hydrolysis

Question 8

what antigenic determinant to be used in e. coli serotyping

a. somatic o antigen
b. flagellar h antigen
c. capsular k antigen
d. vi antigen

Answer 8

somatic o antigen - used for E. COLI AND SHIGELLA SEROTYPING

Question 9

GREEN WITHOUT BLACK CENTER on hektoen enteric agar

a. salmonella
b. shigella
c. proteus
d. klebsiella

Answer 9

shigella - without black

salmonella - green WITH black center

Question 10

how many percent of glucose have in triple sugar iron agar

a. 1%
b. 0.1%
c. 2%

Answer 10

triple sugar iron
CHO:
          lactose  (1%)
          sucrose (1%)
          glucose (0.1%)

Question 11

ph indicator for TSI agar

a. phenol red
b. neutral red

Answer 11

TSI AGAR
ph indicator : phenol red
h2s indicator : ferrous sulfate

Question 12

TSI Agar
K/A with gas , H2S (+)

a. E. coli
b. salmonella
c. shigella
d. proteus

Answer 12

K/A with gas , h2s(+)
salmonella
proteus

Question 13

TSI AGAR
K/A WITHOUT gas , h2s (-)

a. salmonella
b. shigella
c. proteus
d. klebsiella

Answer 13

K/A without gas , h2s (-)
shigella

shigella lagi negative

Question 14

IMViC +,+,-,-

a. e.coli
b. klebsiella
c, enterobacter

Answer 14

Escherichia coli

IMVic +,+,-,-

Question 15

this tests is to detect the ability of the organisms to enzymatically remove the carboxyl group from a specific amino acid

a. imvic test
b. urease test
c. deamination reactions
d. decarboxylation reactions

Answer 15

decarboxylation reaction
- remove the CARBOXYL GROUP FROM A SPECIFIC AMINO ACID

deaminase reaction
- removal of AMINO GROUP FROM EACH AMINO ACID

Question 16

cary blair , amies and stuart is a satisfactory for isolation of what species

a. escherichia coli
b. yersinia pestis
c. shigella
d. salmonella
e. citrobacter
f. edwardsiella

i. a.b.c.d
ii. a.c.d
iii. a.c.e.f
ii. a only

Answer 16

cary blair , amies and stuart is a satisfactory for isolation of ESCHERICHIA COLI, SALMONELLA AND SHIGELLA

ANS: II

Question 17

what spp of enterics is BUBONIC PLAGUE IS A HIGHLY FATAL ZOONIC DISEASE (TRANSMITTED BY RAT FLEAS)

a. yersinia pestis
b. enterobacter
c. citrobacter
d. escherichia coli

Answer 17

yersinia pestis

• agent of plague
• xenopsylla cheopsis - primary vector of disease
• BUBONIC PLAGUE IS A HIGHLY FATAL ZOONIC DISEASE (TRANSMITTED BY RAT FLEAS)
• characterized by high fever and painful inflammatory swelling of axilla and groin lymph nodes (buboes)