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Flashcards in 1st Micro Trans, 3rd Exam Deck (40):
0

Most commonly isolated member of family Bacteriodaceae

Bacteroides fragilis

1

Morphology of Bacteroides
A. Small, with pigments
B. Long, slender, pointed ends
C. Pleomorphic

C

2

Morphology of Prevotella & Porphyromonas
A. Small, with pigments
B. Long, slender, pointed ends
C. Pleomorphic

A

3

Morphology of Fusobacterium
A. Small, with pigments
B. Long, slender, pointed ends
C. Pleomorphic

B

4

Which is not an anaerobic gram positive rod?
A. Veilonella
B. Actinomyces
C. Propionibacterium
D. Mobiluncus

A

It is a Gram negative coccus

5

Phenylethyl alcohol agar grows all ___ anaerobes
A. Faculative
B. Obligate
C. Aerotolerant
D. Microaerophilic

B

6

In thioglycollate broth, ___ is the reducing agent that removes oxygen

Thioglycolic acid

7

___ is the reduction indicator used in thioglycolate broth. Presence of oxygen signifies a __ color

Resazurin
Pink

8

True or false. The protease in members of family Bacteriodaceae degrades IgA

True

9

Which is false about Bacteroides?
A. Saccharolytic
B. May cause septicemia and intraabdominal infection
C. Sensitive to penicillin and older cephalosporins
D. Pleomorphic, with vacuoles and swellings

C

Resistant dapat

10

Bacteroides is inhibited by bile
True or False

false
Stimulated dapat

11

All Bacteroides species cannot produce superoxide dismutase and catalase

T or F?

F
Bacteroides fragilis can

12

Which virulence factor of Bacteroides is responsible for abscess formation?
A. Polysacch capsule
B. Endotoxin
C. Heparinase
D. Succinate

A

13

The endotoxin of Bacteroides is the same as the one for other bacteria. T / F?

F
Structure ang kaiba

14

What does metronidazole have that clindamycin does not?
(Clue: BBB)

Metronidazole can cross blood brain barrier

15

Metronidazole is the best way to treat abscess formation, T or F?

F
Surgery dapat

16

Is Fusobacterium sensitive to Penicillin?

Yes

17

Which is false?
A. F.nucleatum is thin with pointed ends
B. F.nucleatum may be found at GIT and GUT
C. F.nucleatum is sometimes alpha hemolytic
D. F.nucleatum colonies are convex, translucent, dull and opaque

B

Mouth and GUT dapat

18

Which is false?
A. F.necrophorum may be found at GIT
B. It may only be alpha hemolytic
C. It is broad with rounded ends/bulbous swellings
D. None of the above

B

Beta hemo too

19

Enumerate the three virulence factors of Fusobacterium.

LPS
Hemolysin
Lipase

20

The ff pertain to what disease?
❤️Postanginal sepsis
❤️Human necrobacillosis
❤️Forgotten Disease

Lemierre's syndrome

21

Forgotten Disease develops after ____ has created __

Sore throat has created a peritonsillar abscess

22

From tonsillar vein, Fusobacterium goes to this blood vessel

Internal jugular vein

23

At the internal jugular vein, the endotoxin of Fusobacterium produces two things...

Platelet aggregation
Septic thrombus formation

24

All three can treat Fusobacterium except
A. Metronidazole
B. Clindamycin
C. Cephalosporin
D. None of the above

D

25

False about Porphorymonas
A.saccharolytic
B.at mouth and lower genital tract
C.produce tan and black pigmentation
D.sometimes Beta hemolytic

A

asaccharolytic dapat

26

All are virulence factors of Porphorymonas gingivalis except
A. Butyrate
B. Collagenase
C. Lipase
D. Polysaccharide capsule

C

Lipase is in Fusobacterium

27

Identify
Severe abscess caused by P.gingivalis

Empyema

28

Drug of choice vs P.gingivalis

Penicillin G

29

False about Prevotella
A.saccharolytic
B.at respi and female GUT
C.all have pigmentation

C

Some do not have pigment

30

False about Prevotella bivia
A.small coccobacilli in pairs or short chains
B.cause bacterial vaginosis
C.sensitive to Penicillin G and cephalosporin

C

Resistant dapat

31

Which is not a virulence factor of Prevotella bivia?
A. Beta lactamase
B. Butyrate
C. Chymotrypsinase
D. Trypsinase
E. Hemin

B

B is for Porphorymonas

32

Manifestations of P.bivia are usually
A. Cardiac
B. Pulmonary
C. Obstetric and Gynecologic
D. All of the above

C

33

Drugs of choice for Prevotella bivia

Metronidazole
Imipenem

34

Which of the ff is a rare etiologic agent in serious infections?
A. Porphyromonas
B. Veilonella
C. Peptococcus
D. Fusobacterium

B

35

Veilonella can be found in the ff except
A. Mouth
B. Vagina
C. GIT
D. LRT

D

URT dapat

36

False about Propionibacterium
A. Ferments --> propionic acid & carbon dioxide
B. Pleiomorphic
C. Aerobic to aerotolerant
D. Makes Swiss cheese

C

Anaerobic dapat

37

Causative agent of acne vulgaris

Propionibacterium acnes

38

Growth of P.acnes stimulated by ___, leading to inflammation of __

Excessive oil production
Inflammation of sebaceous glands

39

False about Peptostreptococcus
A. Cells in lumps or chains
B. Gram negative anaerobe
C. Participate in mixed anaerobic
infection
D. Penicillin is treatment

B

Gram positive anaerobe