Term
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Definition
Gram + cocci
facultative anaerobes
strictly fermentative
growth results in marked decrease in pH
form chains |
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Term
|
Definition
suppurative disease
opportunistic pathogen |
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Term
|
Definition
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Term
|
Definition
| fibrils that inhibit phagocytosis by inhibiting C3 in complement cascade |
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Term
| Lancefield Serological Typing |
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Definition
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Term
| Lancefield Serological Grouping |
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Definition
based on C-carbohydrate
Groups B,C,D,G are animal pathogens |
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Term
| Lancefield Grouping Mechanism |
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Definition
extract contains antibody against the specific C-carbohydrate
this antibody is specific for a group of pathogens (A-G)
see precipitation when it is positive |
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Term
|
Definition
reason why more invasive than staph
Streptokinase
hyaluronidase
DNAse
produces thinner, spreading exudate instead of thick abscess like with staph |
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Term
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Definition
strep virulence factor
converts and activates plasminogen to become an active protease
digests fibrin clots and inhibits walling off |
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Term
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Definition
Strep virulence factor
digests connective tissues and aids in spread |
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Term
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Definition
Strep virulence factor
thins out thick, viscous deposits of DNA leaking out from lysed inflammatory cells |
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Term
|
Definition
does not survive phagocytosis
produces streptolysins to lyse PMNs to increase inflammatory damage |
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Term
| Streptococcus equi Disease |
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Definition
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Term
| Streptococcus equi Transmission/Entry |
|
Definition
from horse to horse
oral/nasal routes
ingestion of contaminated food/water
flies
survive in contaminated environment for 3-4 weeks |
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Term
| Streptococcus equi Spread |
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Definition
adheres to epithelial cells
invades through mucosa
spreads through draining lymph nodes and causes abscesses in lymph nodes
Rupture lymph nodes drain into guttoral pouch and stays in there for along time
Pus can drain backwards through eustacean tube and into pharynx and out the nares |
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Term
| Streptococcus equi Symptoms |
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Definition
| anorexia, fever, inflammation of nasal mucosa, purulent discharge, intermandibular area becomes distended, noisy rapid breathing |
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Term
| Streptococcus equi Diagnosis |
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Definition
| can aspirate lymph node and Gram stain it |
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Term
| Streptococcus equi Damage |
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Definition
damage and rupture of lymph nodes
can spread to thorax or abdomen - bastard strangles |
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Term
|
Definition
caused by Streptococcus equi
non-contagious acute fatal allergic complication to M-protein
petechial hemorrhages, edema, purpura |
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Term
| Streptococcus equi Vaccination |
|
Definition
a lot of side effects
have to revaccinate every 6 months |
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Term
| Streptococcus zooepidemicus Encounter |
|
Definition
commensal in many species
most common cause of wound infections in hroses
secondary invader of upper respiratory infections in young horses
often follows Streptococcus equi |
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Term
| Streptococcus agalactiae Disease |
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Definition
| most common cause of bovine mastitis |
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Term
| Streptococcus suis Encounter |
|
Definition
opportunistic pathogen
overcrowing in cold weather and poor ventilation
zoonotic |
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Term
| Streptococcus suis Disease |
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Definition
meningitis and septicemia in young pigs
Toxic Shock Syndrome |
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Term
| Streptococcus porcinus Disease |
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Definition
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