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Stain and morphology of Strep:
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Two Classification systems for Strep
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Hemolytic Classifications:
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Serological Classifications:
A, B, C, D, F, G
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B Hemolytic Strep include:
S equi
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a Hemolytic Strep include:
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-
-
-
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Habitat:
Commensal or obligate pathogens of skin
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Where can infection occur?
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Virulence factors of Strep
- Hemolysin
- Streptokinase
- Hyaluronidase
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Zoonotic Sp of Strep:
- S agalactiae
- S dysgalactiae
- S uberis
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-
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Sp of Strep that infects cattle:
- S agalactiae
- S dysgalactiae
- S uberis
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Characteristics of S Canis Dz's:
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S canis causes:
- puppy strangles
- Juvenile pyoderma
- lymphadenitis
- TSS
- Septicemia in kittens
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S equi, subsp. equi causes:
- pharyngitis
- lymphadenitis
- inhalation pneunomia
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Appearance of S equi on BA
Mucoid B hemolytic olonies
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S equi is transmitted via
Fomites
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Pathogenesis of S equi
- Enters through mouth/nose
- attaches to tonsillar crypt mucosa
- -> LN
- => Swelling/pus
- Occlusion of Resp pathway
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How does S equi become highly infectious?
Rupture of submandibular LN
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S suis causes
Septicemia in piglets
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S porcinus causes
Jowl Abscesses
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What causes chronic mastitis in cattle?
S agalactiae
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What causes acute mastitis in cattle?
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What are the symptoms of Strangles(5)?
- Fever
- Nasal Discharge
- Swollen head/neck LN
- Cough
- Difficulty Swallowing
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Chronic Strangles is called
Bastard Strangles
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Symptoms of Bastard Strangles
- Weight Loss
- Dyspnea
- Abscesses
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S suis clinical Dz's (5):
- Meningitis
- Arthritis
- Septicemia
- Pneumonie
- Endocarditis
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Prevention of S suis?
- Reduce Stress
- Vx w/ bacterins
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Which type of S suis is the most virulent?
Type 2
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Which mastitis causing bacteria are CAMP+?
S agalactiae
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Which mastitis causing bacteria are a hemolytic?
- S dysgalactiae dysgalacticae
- S uberis
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S agalactiae infects which anatomical locations?
Exclusively mammary
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What anatomical Locations does S dysgalacticae dysgalacticae infect?
- Mammary (acute)
- Buccal Cavity
- Genitalia
- Skin of udder
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What anatomical Locations does S uberis infect?
- Tonsils
- Vagina
- Feces
- Mastitis
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Multipoint Mastitis Control Program:
- 1. Clean/Dry environment
- 2. Sanitizing/maint. of milking equip
- 3. Aseptic teat care
- 4. Dry-cow therapy
- 5. Somatic Cell Count/Culling
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Drugs used to Tx Strep causing Mastitis:
- Pen
- Cloxacillin
- (same for staph mastitis)
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Agent for Jowl abscesses in pigs?
S porcinus
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S porcinus is AKA:
- Streptococcal lymphadenitis
- Strangles in hogs
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Drugs used to Tx S porcinus
- Tetracyclines in feed at weaning
- (Vx not effective)
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S _____ causes purpura and gangrenous changes in leg
suis
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