Bacte Lec: Fusobacterium & Bacteroides Flashcards
Non-spore forming anaerobic include:
- Gram (-) bacilli
- Gram (+) cocci
- Gram (-) bacilli
They are present in large number on?
the mucous membranes and intestinal tract of animals
Gram negative anaerobic bacilli make up more than __% of the bacteria in the intestinal tract
90%
Bacteria causing disease in human and animals
Gram Negative Anaerobic Non-sporeforming Bacilli
Gram Negative Anaerobic Non-sporeforming Bacilli belong to the family?
Bacteroidaceae
Bacteroides corrodens has been renamed ?
Eikenella corrodens
Prevotella melaninogenica, formerly B. melaninogenica; involved in?
Infections in animals
It is associated with oral infections in horses and cats
Prevotella heparinolyticus (B. heparinolyticus)
Associated with summer mastitis in cattle
Porphyromonas levii
Causes contagious foot rot in sheep
Dichelobacter nodosus (B. nodosus)
These bacteria are normal flora on mucous membranes:
Peptostreptococcus and Peptococcus
Peptostreptococcus and Peptococcus are what type?
Gram Positive Anaerobic Non-sporeforming Cocci
What is the type species of peptostreptococcuss?
Peptostreptococcus anaerobius
Modern name for Peptostreptococcus magnus
Finegoldia magna
Only species of Peptococcus
Peptococcus niger
It is associated with ovine foot rot
Peptococcus niger
Is the causative agent of cystitis and pyelonephritis in swine
Actinobaculum suis
Where is the location of A. suis in boars that serve as source of infection?
in preputial diverticulum
A. suis is transmission
During breeding
T/F: A. suis is disease is descending and affects both male and female resulting to death in pigs without clinic signs.
False: Disease is ascending and limited to females and results in death of sows without clinical signs
T/F: In Actinobaculum suis, Penicillin is not effective.
False: Penicillin effective if given early but not in chronic cases
It is frequently isolated from animals but not considered pathogenic; normal flora of female genital tract
Lactobacillus
Actinobaculum, Lactobacillus, & Propionibacterium are what type of bacteroides?
Gram-positive Anaerobic Non-sporeforming Bacilli
Bacteroides that is associated with dairy products and skin (acne) but non-pathogenic in animals
Propionibacterium
Frequently invade _____ with _____which provide favorable _____condition for their growth
Damaged tissues, necrosis, aneorobic
What are the characteristic of infections of these bacteria?
Necrotic, gangrenous (often with clostridia) and suppurative foul-smelling conditions
These bacteria causes what?
Abscesses in lung, liver and brain; pyometritis; cystitis and urinary tract infections, postsurgical abscesses, diarrheal
What are the anaerobic jar system that eliminate oxygen?
Brewer, Torbal and GasPak systems
Pre-reduced media and media containing reducing agents such as?
cooked meat medium and thioglycolate broth
It detects volatile and non- volatile fatty acids produced by anaerobes
Gas liquid chromatography analysis
Where do you collect specimens associated with these bacteria
Tissues and pus from abscesses and suppurative material
T/F: Specimens must be cultured immediately and prevent exposure to O2
True
It is a commensal of alimentary tract and mucous membranes
Fusobacterium necrophorum
What are the biotypes of F. necrophorum?
Biotypes: A, B, AB and C
F. necrophorum biotype that causes bovine liver abscesses
Biotype A and B
F. necrophorum biotype that affects ruminal contents and lesions
Biotype B
F. necrophorum biotype B is more virulent than A?
Biotype A more virulent than B
What biotype is Fusobacterium pseudonecrophorum, now F. varium; infrequent opportunist in humans
Biotype C
Biotype of F. necrophorum subsp. funduliforme
Biotype B
Biotype of F. necrophorum subsp. necrophorum
Biotype A
F. necrophorum infections are frequently mixed with what bacteria that causes liver abscesses in cattle?
Archanobacterium pyogenes
What are the virulence factors of F. necrophorum?
- Endotoxin and a potent leukotoxin
- Extracellular products (such as hemolysin, hemagglutinin, adhesin, platelet aggregation factor, protease and Dnase)
- Capsulated strains more virulent for mice
T/F: F. necrophorum is a primary invader in necrotic stomatitis, pharyngitis and enteritis.
False: Secondary invade
General term for F. necrophorum infection is ?
Necrobacillosis
Thrush is caused by? and what animal is affected?
Fusobacterium necrophorum causes thrush and horses are affected.
Fusobacterium necrophorum in cattle causes?
Metritis, cellulitis, mastitis and calf diphtheria
Fusobacterium necrophorum in cattle is found in?
Found in necrotic areas of the mouth, pharynx, and trachea
Fusobacterium necrophorum in sheep causes?
Frequent secondary invader in lip and leg ulcerations (primary cause is ulcerative dermatosis virus)
Fusobacterium necrophorum
together with Archanobacterium pyogenes causes what in sheep?
Causes foot abscesses or ovine interdigital dermatitis, abortion
Fusobacterium necrophorum causes what in swine?
Principal cause of “bull nose” from injury caused by ringing boars
Fusobacterium necrophorum in swine is the secondary invader of?
Swine dysentery and necrotic enteritis
Fusobacterium necrophorum in fowl causes?
Involved in avian diphtheria, primary cause is fowl pox virus
What are the characteristic of Gram negative rods in diagnosis?
Short rods, long filaments and moniliform bodies seen
What are the colony characteristics of these bacteria
Small, smooth, convex and whitish yellow in color with narrow zone of alpha or beta hemolysis
Comprises 10 species, all recovered from clinical specimens
Bacteroides fragilis group
How many species does Bacteroides fragilis group have?
10
Most common anaerobe causing infections in humans, occasionally in farm and companion animals
Bacteroides fragilis
Bacteroides fragilis produces this which causes accumulation of fluid in ligated intestinal loops of lambs and calves
endotoxin
What is the enterotoxin of Bacteroides fragilis?
Fragilysin
It is an extracellular zinc metalloprotease
Fragilysin
