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Flashcards in Other Gram Negative Rods Deck (56)
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False about Vibrio cholerae
A.Comma shaped, curved rod
B. Single flagellum & motile
C. Facultative anaerobes
D. Oxidase negative

D. Oxidase negative

Positive dapat

1

False about Vibrio cholerae
A.Tolerate alkaline media
B.Sensitive to acid
C.Maybe halophilic
D. None of those mentioned

D.

2

False about antigenic structure of Vibrio cholerae
A.Single heat stabile H antigen (in several Vibrio)
B.O lipopolysaccharide Found in V.cholerae
C. O LPS Used for serologic specificity

A.Single heat stabile H antigen (in several Vibrio)

Labile dapat

3

Differentiate serotype from biotype

Serotype-classified based on cell surface antigen

Biotype-Classified based on physical and/or biochemical properties

4

Two biotypes of Vibrio cholerae O1 antigen

Classical and El Tor

5

Adherence factors of Vibrio cholerae

hemagglutinin, toxin-coregulated pili)

6

Motility, Mucinolytic enzymes, Cholera exotoxin, Neuraminidase, Proteases

Which is not a virulence factor of V.cholera?

Cholera exotoxin.

Enterotoxin dapat

7

False about Cholera enterotoxin
A.Heat labile (same as LT of ETEC)
B.Composed of subunit A and B
C. Subunit A catalyzes ADP-ribosylation regulator complex
D. Increase in cAMP prolonged hypersecretion of water and electrolytes
E. Stimulates absorption of Na+ and Cl-

E. Stimulates absorption of Na+ and Cl-

Inhibits dapat

8

Which is not true about V.cholera O139?
A.Derived from the pandemic El Tor biotype
B.Lost the characteristic O1 somatic antigen
C.Produces a polysaccharide capsule and a different cholera enterotoxin D.Retained the epidemic potential of O1 strain

C.Produces a polysaccharide capsule and a different cholera enterotoxin

Same enterotoxin pa rin

9

V.cholera onset of symptoms

2-3 days

10

V.cholera mode of transmission

ingestion of contaminated food and water

11

Fill in the blanks(V.cholera clinical manifestations):

Watery diarrhea (___ stools)
Vomiting
Loss of 15-20 liters of fluid/day Dehydration and shock
___ hands
Fluid and electrolyte imbalance

Rice water
Washer woman's

12

True or false: In lab diagnosis of Vibrio cholera, Gram stain is done on stool specimen

False. From plate dapat

13

In lab diagnosis of Vibrio cholera, what kind of smear is done?

dark filed microscopy/phase contrast

14

What specific media is used for Vibrio cholerae?

Thiosulfate Bile Salt Agar

15

Which is false in TCBS Culture?
A. Alkaline peptone water must be applied for 8 hours after culture
B. Should be held for 48 hours before reporting as negative for V. cholerae
C. Both are false

A. Alkaline peptone water must be applied for 8 hours after culture

prior to culture dapat

16

color of colonies on TCBS
___for V. cholerae
__ for V. parahemolyticus

Yellow
Green

17

Vibrio species causing Septicemia, wound infection

V.vulnificus

18

False about Tetracycline
a. Interferes with nucleic acid synthesis
b. Shortens the period of excretion of Vibrio
C. Reduces stool output in cholera
D. Must be given for 3 days to patients with cholera

a. Interferes with nucleic acid synthesis

Protein dapat

19

True or false: Vaccine can be used to prevent cholera

True (oral cholera vaccine)

20

False about Campylobacter jejuni
A. comma, S or ‘gull wing’ shapes
B. Motile with 1 flagellum
C. Aerobic, non-fermenting
D. oxidase positive

C. Aerobic, non-fermenting

Microaerophilic dapat

21

Which is false about C.jejuni?
A.has LPS with endocytic activity
B.parasites in GIT of meat and poultry
C.mode of transmission: ingestion of contaminated food and water

B.parasites in GIT of meat and poultry

Commensals dapat

22

False about Pathology of C.jejuni
A.Multiply in large intestines, invade the epithelium producing inflammation
B.Acute exudative and hemorrhagic inflammation
C.Increase in WBC or pus cells in fecalysis
D.Can invade the bloodstream
E.Heat-labile toxin may cause diarrhea

A.Multiply in large intestines, invade the epithelium producing inflammation

Small dapat

23

For C.jejuni
A.Onset of symptoms: 2-4 days B.Incubation period: 1-4 days C.Symptoms last for 2-4 days

Which is false?

C. 7-10 dapat

24

Which is not a possible complication of C.jejuni infection?
(1) Reactive arthritis
(2) Hemolytic uremic syndrome
(3) Meningitis
(4) Recurrent colitis
(5) Chronic cholecystitis

(5) Chronic cholecystitis

Acute dapat :)

25

Complication of C.jejuni infection involving progressive and ascending paralysis of muscle groups

Guillain-Barre syndrome

26

In lab diagnosis of C.jejuni, which is not done?
A. Gram stain
B. Culture on TCBS
C. Dark field microscopy

B. Culture on TCBS

Skirrow's or Campy blood agar dapat

27

Campy blood agar has the same mechanism as ___ in V.cholera

Alkaline peptone water

28

False about H.pylori
A.Found in esophagus + the mucus gel that coats the stomach epithelium
B.secreted in the poop
C.may be part of normal flora
D.Grows at pH 6.0 – 7.0

B

29

(1) Spiral shaped, gram (-) rods
(2) Motile
(3) Urease (-)

Which is not true about H.pylori?

(3)
Dapat urease positive