Term
| why is strep equi called strangles? |
|
Definition
| it enters the respiratory tract and spreads to the submandibular lymph nodes. the swelling caused by abcessing and collection of macrophage causes dsypagia (difficulty swallowing) |
|
|
Term
| virulence factors of s equi |
|
Definition
CAPSULE (hyaluronic acid)
M protein (main antigen)
IgG binding proteins
teichoic acid and peptidoglycan
streptokinase
hyaluronidase
DNAase |
|
|
Term
| Detecting hemolysin produced by s. agalactiae |
|
Definition
co cultivate on blood agar with beta lysin producing staph aureus
this causes enhanced hemolysis that can be seen on the plate
aka CAMP test |
|
|
Term
| low virulence Strep organisms are associated with what infections? |
|
Definition
chronic disease
example: vegetative endocarditis |
|
|
Term
|
Definition
NEGATIVE
facultative anaerobe
has small colonies |
|
|
Term
| A B and C groups of strep: name the strep species and the host |
|
Definition
Group A: pyogenes. human infections
Group B: agalactiae. mastitis
Group c: equi. strangles
all of these are beta hemolytic |
|
|
Term
| ExtraCellular Virulence Factors of strep |
|
Definition
DNAase, proteases, NADase: not harmful but present in pathogenic spp
hyaluronidase: increases tissue permeability
streptokinase: thrombolysis
TOXINS:
streptolysin, SPE strep. pyrogenic exotoxins (scarlet fever and toxic shock syndrome)
|
|
|
Term
| Cellular Virulence Factors of strep |
|
Definition
Capsule
Peptidoglycan
teichoic and lipoteichoic acid
M protein (beta hemolytic)
Ig binding |
|
|
Term
| Rhodococcus equi is spread by... |
|
Definition
|
|
Term
| corynebacterium pseudotuberculosis spreads through tissues by... |
|
Definition
Phospholipase D and cell wall lipids (corynemycolic acids)
cause pyogranulomatous abcess
pigeon fever in horses and caseous lymphadenitis in small ruminants |
|
|
Term
| the most psychrophilic bacteria we've learned? |
|
Definition
Listeria monocytogenes
psychrophiles live in cold environments |
|
|
Term
main antigen of rhodococcus equi
(serology and vaccine) |
|
Definition
| M protein: an extracellular matrix binding surface protein |
|
|
Term
| caseous lymphadenitis and pigeon fever: serological test for diagnosis |
|
Definition
enhanced/ synergistic hemolysis inhibition
|
|
|
Term
|
Definition
used with beta lactam antibiotics to reduce resistance
it is a beta lactamase inhibitor |
|
|
Term
| major surface antigens of gram positive |
|
Definition
| glycerol or ribitol phosphate acidic polysaccharide polymers |
|
|
Term
|
Definition
flagellar antigens
used in serotyping for listeria |
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|
