Staph 1
Most staph species are oxalase ___ and catalase ___; most pathogenic staph are positive on what additional biochemical test (unlike commensal staph)
Ox(-)/Cat(+)
Pathogenic - coag +
Classic clinical sign of pathogenic Staph infection
What biochemical test most easily distinguishes strep from staph, and which is positive/which is negative?
What is catalase; strep is catalase negative/staph is catalase positive
Type of hemolysis associated with increased pathogenicity in streptococcal species
What is b-hemolysis
Mastitis in most livestock species can be caused by this species of staph
What is staph aureus
Growth pattern on SBA/Macconkey and colony appearance/characteristic
Yes on SBA, no on Macconkey, white round colonies, +/- hemolysis (often pathogenic species have a/b hemolysis/"double" hemolysis)
Preferred type of test for determining streptococcus lancefield groups
What is latex agglutination test
Name one species of streptococcus which is zoonotic
Strep equi ssp zooepidemicus, strep suis
Causative agent of greasy pig disease
What is staph hyicus
Name 2 species of staph that can cause otitis in the dog
pseudintermedius, aureus, schleiferi ssp coagulans
Cause of equine strangles, and name 2 common clinical signs associated with disease
What is strep equi ssp equi;
key signs: fever; nasal discharge; mandibular lymphadenopathy
Name 2 streptococcal species associated with mastitis in cattle
Strep agalactiae (chronic mastitis), dysgalactiae ssp dysgalactiae, occasional: pyogenes, equi ssp zooepidemicus, canis, uberis
Name one test that can distinguish staph from micrococci
Micrococci are variably oxidase +; differ in susceptibility to bacitracin and furazolidone, and are often pigmented
Name a test that can distinguish staph from enteroccocci
Catalse (enterococcus is catalase neg)
Name 3 lancefield group C species
What are: strep dysgalactiae ssp dysgalactiae and ssp equisimilis, strep equi ssp equi and zoo
This agent can cause septicemia, meningitis, polyarthritis, and pneumonia in pigs
This is the staph species that can cause lesions similar to caseous lymphadenitis in sheep
Aureus ssp anaerobius
Name the protein & gene altered in methicillin resistant staph species
Protein: PBP2a (penicillin-binding protein)
Gene: mecA
Name the test where staph aureus is streaked on SBA at a 90deg angle to the streptococcus, and which lancefield group produces arrowhead-shaped lysis or RBCs
CAMP test - group B (Strep agalactiae)
Name 2 species of streptococcus that cause disease in birds and name 2 common clinical outcomes of infection
strep equi ssp zooepidemicus, strep gallolyticus, strep dysgalactiae ssp equisimilis; septicemia, endocarditis, arthritis, osteomyelitis