DR.Z (ENTEROBACTERIA & PSEUDOMONAS)

Question 1

1. The following microorganism exhibits swarming effect
   a. E. coli
   b. Proteus
   c. Klebsiella
   d. Salmonella

Answer 1

b. Proteus

Question 2

2. Which microorganism exhibit this description: Alkaline
   slant, acid butt, (-) H2S
   a) Shigella
   b) Salmonella
   c) E. coli
   d) Morganella

Answer 2

a) Shigella

Question 3

3. In addition to being a group of gram-negative bacteria
   considered normal flora of the gastrointestinal tract of
   humans and animals, which one of the following also
   contains agents of important diseases such as
   gastroenteritis and enteric fever, urinary tract infections,
   and bacterial pneumonia?
   a. E. coli
   b. Salmonella typhi
   c. Shigella dysenteriae
   d. Providencia

Answer 3

b. Salmonella typhi

Question 4

4. Escherichia coli can be presumptively diagnosed for
   most Enterobacteriaceae are positive for which
   biochemical reactions?
   a) Glucose, oxidase, catalase
   b) Glucose, indole, oxidase
   c) Glucose, reduce nitrates to nitrites, oxidase
   d) Glucose, catalase, nitrates to nitrites, oxidase BUT
   E.coli is OX (-)

Answer 4

d) Glucose, catalase, nitrates to nitrites, oxidase BUT
E.coli is OX (-)

Question 5

5. Escherichia coli can be presumptively identified on the
   basic of which characteristic?
   a. Spot indole test
   b. Citrate test
   c. Urease test
   d. Oxidase test

Answer 5

a. Spot indole test

Question 6

6. This microorganism is the leading cause of meningitis in
   infants:
   a) Klebsiella pneumonia
   b) Streptococcus pyogenes
   c) Salmonella typhi
   d) E. Coli

Answer 6

d) E. Coli

Question 7

7. A gram negative bacillus that is H2S positive
   a. Proteus
   b. Salmonella
   c. Shigella
   d. Morganella

Answer 7

b. Salmonella

Question 8

8. MacConkey sorbitol agar is useful for detecting
   pathogenic strains of:
   a) E. coli
   b) Salmonella
   c) Shigella
   d) Serratia

Answer 8

a) E. coli

Question 9

9. Enterotoxigenic and enteroinvasive are terms often
   linked to:
   a. Klebsiella
   b. E. coli
   c. Shigella
   d. Providencia

Answer 9

b. E. coli

Question 10

10. The following microorganism causes Traveller’s
    diarrhea *
    a) EAEC
    b) ETEC
    c) EIEC
    d) EPEC

Answer 10

b) ETEC

Question 11

11. Causes acute and chronic diarrhea (>14 days in
    duration) in persons in developing countries and persistent
    diarrhea in patients with HIV?
    a. EAEC
    b. ETEC
    c. EIEC
    d. EPEC

Answer 11

a. EAEC

Question 12

12. A green colony with a black center isolate on EMB
    from a stool specimen is most likely? *
    a) Salmonella
    b) Shigella
    c) Klebsiella
    d) E. Coli

Answer 12

d) E. Coli

Question 13

13. E. coli can produce a toxin causing hemorrhagic colitis
    similar to that of: *
    a. Salmonella typhi
    b. Shigella dysenteriae
    c. Klebsiella pneumoniae
    d. Enterointoxigenic E. coli

Answer 13

b. Shigella dysenteriae

Question 14

14. On MacConkey agar, Serratia would appear as *
    a. Black
    b. Red
    c. Metallic Green
    d. Fluorescent green

Answer 14

b. Red

Question 15

15. E. coli would appear on TSI as:
    a) Alkaline slant, Acid butt, (+) H2S
    b) Acid slant, Acid butt, (+) H2S
    c) Acid Slant, Acid butt, (+) Gas
    d) Alkaline slant, acid butt, (+) Gas

Answer 15

c) Acid Slant, Acid butt, (+) Gas

Question 16

1. The following is/are characteristic/s of
   Stenotrophomonas maltophila *
   a. Oxidase negative
   b. Black colonies
   c. Both
   d. Neither

Answer 16

a. Oxidase negative

b. Black colonies- GREEN TO GRAY DAPAT

Question 17

2. The following is/are characteristic/s of Burkholderia
   pseudomallei: *
   a) Oxidizes glucose
   b) Oxidizes lactose
   c) Both
   d) Neither

Answer 17

c) Both

Question 18

3. Which of the following is/are antigenic structure/s of
   Pseudomonas aeruginosa? *
   a. Pigments
   b. Phospholipase
   c. Both if pigments refer to pyocyanin and pyoverdin
   d. Neither

Answer 18

c. Both if pigments refer to pyocyanin and pyoverdin

Question 19

4. Pseudomonas aeruginosa exhibits the following growth
   characteristic/s:
   a) Grows well at 44’C
   b) Catalase positive
   c) Both
   d) Neither

Answer 19

b) Catalase positive

Question 20

5. The following is/are characteristic/s of Pseudomonas: *
   a. Grape like odor
   b. Taco like odor
   c. Both
   d. Neither

Answer 20

c. Both

Question 21

6. Burkholderia pseudomallei *
   a) Causes whitmore’s disease
   b) Causes melioidosis
   c) Both
   d) Neither

Answer 21

c. Both

Question 22

8. The following is/are treatment for Pseudomonas aeruginosa: *
   a) Ceftriaxone
   b) Ceftazidime
   c) Both
   d) Neither

Answer 22

b) Ceftazidime

Question 23

9. Lipopolysaccharides of Pseudomonas aeruginosa cause *
   a. Sepsis
   b. ARDS
   c. Both
   d. Neither

Answer 23

c. Both

Question 24

10. The following is/are clinical finding/s in Pseudomonas aeruginosa: *
    a) Malignant otitis externa
    b) Mycocardial Infarction
    c) Both
    d) Neither

Answer 24

a) Malignant otitis externa