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55 Cards in this Set

  • Front
  • Back
Staphylococcus Atmospheric, location, environment, and transmission characteristics
facultative anaerobe
extracellular
skin or mucous membrane
transmission
Faculative anaerobe characteristics
make ATP via respiration in presence of O2, but produces energy via fermentation without O2.
Surface virulence factors refer to...
Biology of organism and how causes disease.
Staphylococcus pathogenesis
surface virulence factors : adhesion
teichoic acid, fibronectin,, collagen, fibrinogen binding molecules
Stphylococcus pathogenesis surface virulence factors: other
capsule: opsonization
Protein A - IgG opsionization
Coagulase - provides physical barrier
Staphylococcus Protein A does what
avoids opsonization by binding to Fc receptor of IgG. Macrophages also have Fc receptors
Staphylococcus pathogenesis
secreted virulence factors: enzymes
Enzymes - DNase, Lipase, Protease, Hyaluronidase, and catalase
Protease is of what advantage to pathogen
it reacts with host components to provide itself with nutrients.
Hyaluronidase is of what benefit to pathogen?
it afffects connective tissue allowing it to spread better.
Catalase does what?
converts H2O2 to H2O and O2.
Staphylococcus secreted virulence factors hemoysins/toxins
cytotoxic, cytolytic. Inserts into host cell membrane and lyses the cell.
B toxin is what
sphingomyelinase
Staphylococcus virulence factors: enterotoxins
super antigens: modulate host immune response. secretes TNF-a, IL-1, IL-6 (shock)
Staph spp. of Vet Med
S. aureus - all species
S. pseudintermedius - dog +
S schleiferi - dog, +
S. hyicus - pig, others
S. epidermidis - dog +
Coagulase positive Staph spp.
S. aureus
S. pseudintermedius
S. schleiferi
S. hyicus
Staphylococcus spp. Coagulase negative
S. epidermidis
Coagulase is a sign of
pathogenicity
S. aureus causes what septicemic/suppurative conditions
Lamb tick pyemia
abscesses, lameness, bacteremia, death
S. aureus infections
Lamb tick pyemia
broiler infection
bovine mastitis
equine botryomycosis
equine/canine pyoderma
otitis externa
S. aureus broiler infection
omphatitis
arthritis
bumblefoot
S. aureus Bovine Mastitis
abrasion teat orifice
ductular epithelium
mammary gland
inflammation
contagious
S. aureus equine diseases
Equine botryomycosis: spermatic cord infection, granulmatous condition
Equine pyoderma
Equine pyoderma caused by
S. aureus
S. intermedius
Canine pyoderma/otitis externa caused by
S. pseudointermedius (frequent)
S. aureus (rare)
skin, sub Q, abscesses
S. hyicus diseases
Porcine exudative epidermitis
greasy pig syndrome
patches of dirty brown greasy hair, whole body, death in 10 days
staphylococcus Zoonosis
S. aureus - yes
MRSA - yes
S. pseudintermedius - less common
Streptococcus & Enterococcus characteristics
Gram positive cocci in chain or single, non-motile, non-spore-forming
Streptococcus & Enterococcus hemolytic characteristics
a, b g
Streptococcus and Enterococcus Lancefield grouping -
A - H and K- V
Streptococcus and Enterococcus atmospheric characteristics
facultative anaerobe
Streptococcus and Enterococcus Location, enviroment and transmission
extracellular
mucosa - GI and respiratory tract
direct contact, fomites
Strept. pathogenesis: surface virulence factors:adhesion molecules
lipoteichoic acids, fibronectin-binding protein
Strep. pathogenesis surface virulence factors"other
hyaluronic acid - evasion
M protein - Ag variation
C5 Peptidase - molecular mimicry
Strep pathogenesis secreted virulence factors enzymes:
IgA protease - adherance
DNase, Lipase - nutrients
Hyaluronidase spreading, breaksdown CT
Strep. pathogenesis: Toxins
streptolysin O (SLO) - cytolytic
Pyogenic Exotoxins (SPE) Super Ag, tissue damage, inflammation, shock
Strep ssp - CAMP
Staph B toxin
S. agalactiae - CAMP factor/ protein B
synergistic hemolysis
Strep spp.
human strep throat
S. pyogenes
strep spp. Vet med
S. agalactiae
S. dysgalactiae (disgalactiae, equisimilis)
S. equi (equi/zooepidemicus
S. suis
S. canis
Enterococcus spp causes
UTI, opportunistic infections
S agalactiae
B
Bovine mastitis
S. dysgalactiae ssp
dysgalactiae C Bovine mastitis
equisimilis C Equine/other abscess
S. equi
equi C Equine strangles
zooepidemicus C euqine pneumonia
S. suis
D porcine septicemia
S canis
G canine/feline infctions
Bovine mastitis cause by what Strep ssp.
B S. agalactiae (chronic)
C S. dysglactiea (acute)
S. uberis (environment
Strep bovine mastitis habitat
milk duct
buccal cavity
skin
vagina
S. Canis
canine feline infections
septicemia
pneumonia shock
pyoderma
omphalophelbitis
S. equi
Equine strangles
highly contagious/febrile
retropharyngeal lymph node
swelling/rupture
S. zooepidemicus
equine pneumonia
equine uterine infection
wound infection/many species
S suis
porcine infection
septicemia
encephalitis/meningitis
endocarditis
arthritis
many serotypes (1&2common)
Enterococcus spp
intestinal flora
UTI
surgical wound/blood stream
VRE
vancomycin G+ bacteria
drug of last resort only
have developed resistance
Enterococcus is susceptible to
vancomycin
Laboratory diagnosis includes
sample collection
cultrue and ID
Antimicrobial susceptibilit
Hemolytic pattern
Treatment control and prevention
predisposing factors
source of infection
antibiotic use
no effective vaccines
patient or herd management.