Flashcards in (Arcanobacterium) Trueperella and Actinobaculum Deck (17)
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1
Describe the bacterium: Trueperella
Gram positive, catalase negative, pleomorphic, facultative anaerobe, non-spore forming, non-motile, non-capsulated, capnophilic
2
Arcanobacterium- Acid fast? Hemolysis?
No mycolic acids so acid fast NEGATIVE. BETA hemolytic
3
Arcanobacterium - description
Gram positive, anaerobic. Variable hemolysis
4
When I say summer mastitis, you say....
Trueperella pyogenes!
5
Cows - Pyogranulomatous mastitis
Trueperella pyogenes
6
Summer Mastitis pathogenesis & virulence factors
Physical/microbial barrier broken--> adhesion--> Neuramidases expose receptors, aids binding--> Proteases, DNAases help spread. - Pyolysin O=pore-forming, damages host cell
7
Most important virulence factors of arcanobacterium
Pyolysin O (PLO) - Neuraminidase - DNAase - Proteases
8
When I say liver abscesses in cattle, you say...
A. pyogenes (though could also be Fusobacterium necrophorum)
9
A. pyogenes in bovine
**Liver abscesses**, mastitis, endometritis, abortion, endocarditis
10
A. pyogenes in caprine (less important)
Mastitis
11
A. pyogenes in porcine (less important)
Pneumonia, septic arthritis, endocarditis
12
A. pyogenes in poultry (less important)
Osteomyelitis, nephritis
13
A. pyogenes in ovine (less important)
Pneumonia, abortion, endometritis
14
Boars- commensal diphtheroid prepucial mucosa, sexually transmitted to sows, cystitis & pyelonephritis, Dysuria, hematuria, death from renal failure. Urease = main virulence factor
Actinobaculum suis. (Similar to C. renale in bovine)
15
When I say STD of swine with cystitis/ pyelonephritis, you say...
Actinobaculum suis
16
Dx test for Actinobaculum suis
Urease positive! - CNA agar growth (selective media)
17
