Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

BACTERIOLOGY LEC > Fusobacterium and Bacteriodes > Flashcards

Fusobacterium and Bacteriodes Flashcards

1
Q

What type of bacteria are Fusobacterium and Bacteroides?

A

Non-sporeforming, anaerobic bacteria

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the 3 morphological groups of non-sporeforming anaerobes?

A

Gram-negative bacilli

Gram-positive cocci

Gram-positive bacilli

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Where are these anaerobes normally found?

A

Mucous membranes and intestinal tract

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What percentage of gut flora do Gram-negative anaerobic bacilli constitute?

A

> 90% of intestinal bacteria

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What types of infections do Fusobacterium and Bacteriodes
cause?

A

Abscesses, necrotic, and suppurative processes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Fusobacterium and Bacteriodes typically infect alone or with other bacteria?

A

Often mixed infections with aerobes/facultative anaerobes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Fusobacterium produces endospores. (T/F)

A

False (non-sporeforming)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Fusobacterium and Bacteriodes require oxygen for growth. (T/F)

A

False (strict anaerobes)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Gram-negative anaerobes aid in cellulose digestion. (T/F)

A

True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Pure anaerobic infections are most common. (T/F)

A

False (usually polymicrobial)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What family do most pathogenic anaerobic Gram-negative bacilli belong to?

A

Bacteroidaceae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Which clinically important group of Gram-Negative Anaerobic Bacilli contains 10 species?

A

Bacteroides fragilis group

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the current name of the former Bacteroides corrodens?

A

Eikenella corrodens

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Which reclassified species causes summer mastitis in cattle?

A

Porphyromonas levii (formerly B. levii)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What organism causes contagious foot rot in sheep?

A

Dichelobacter nodosus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What transmission routes are common for these anaerobes?

A

Feco-oral and oral-oral

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Which species is associated with oral infections in horses/cats?

A

Prevotella heparinolyticus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What are the two pathogenic subspecies of Fusobacterium necrophorum?

A

subsp. necrophorum

subsp. funduliforme

19
Q

To which family does Dichelobacter nodosus (cause of ovine foot rot) now belong?

A

Cardiobacteriaceae (formerly classified under Bacteroides)

20
Q

What is the primary disease caused by this Gram-negative anaerobic bacillus?

A

Contagious foot rot in sheep

21
Q

What is the current name of the Gram-negative anaerobic bacillus formerly called Bacteroides melaninogenica?

A

Prevotella melaninogenica

22
Q

What is the current family classification for Fusobacterium species?

A

Fusobacteriaceae

23
Q

How frequently does Fusobacterium nucleatum infect animals compared to other species?

A

Infrequent (unlike F. necrophorum)

24
Q

What are the two main genera of Gram-positive anaerobic cocci?

A

Peptostreptococcus and Peptococcus

25
Q

Where are these anaerobic cocci normally found?

A

As normal flora on mucous membranes.

26
Q

Which species is the type species of Peptostreptococcus?

A

Peptostreptococcus anaerobius

27
Q

What is the current name of Peptostreptococcus magnus?

A

Finegoldia magna

28
Q

How many Peptococcus species exist, and what is its name?

A

Only one species: Peptococcus niger

29
Q

Which anaerobic bacillus causes swine cystitis/pyelonephritis?

A

Actinobaculum suis (formerly Eubacterium suis)

30
Q

Where is A. suis harbored in boars?

A

Preputial diverticulum (transmitted during breeding)

31
Q

Is Lactobacillus pathogenic in animals?

A

No - normal genital tract flora

32
Q

What human condition is Propionibacterium associated with?

A

Acne (non-pathogenic in animals)

33
Q

What three systems create anaerobic conditions?

A

Anaerobic jars (GasPak)

Glove boxes

Pre-reduced media (thioglycolate broth)

34
Q

What diagnostic test identifies anaerobic metabolites?

A

Gas-liquid chromatography of fatty acids

35
Q

Why must Gram-positive Anaerobic specimens avoid oxygen exposure?

A

O₂ kills strict anaerobes

36
Q

What are the two pathogenic subspecies of Fusobacterium necrophorum?

A

Fusobacterium necrophorum subsp. necrophorum (more virulent)

Fusobacterium necrophorum subsp. funduliforme

37
Q

What two key toxins does Fusobacterium necrophorum produce?

A

Endotoxin

Leukotoxin

38
Q

Why are capsulated strains of Fusobacterium necrophorum more dangerous?

A

They show increased virulence in mice

39
Q

What two major conditions does Fusobacterium necrophorum cause in cattle?

A

Liver abscesses

Foot rot

40
Q

What viral disease does Fusobacterium necrophorum complicate in sheep?

A

Ulcerative dermatosis (as secondary infection)

41
Q

What nasal condition does Fusobacterium necrophorum cause in swine from boar injuries?

A

“Bull nose”

42
Q

Which Bacteroides species is essential for transmitting foot-rot in sheep?

A

Bacteroides nodosus

43
Q

What are the growth requirements of Bacteroides nodosus?

A

Obligate anaerobe

BACTERIOLOGY LEC (19 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions