Bact E2, IV


Stain and morphology of Strep:


G+Cocci chains/pairs


Two Classification systems for Strep


HemolysisSeriological


Hemolytic Classifications:


abg


Serological Classifications:


A, B, C, D, F, G


B Hemolytic Strep include:


S equi


a Hemolytic Strep include:


S. uberisS. pneumoniae


G includes:


S. Canis


C includes:


S Equi


D includes:


S suis


SubSp of Strep Equi:


equiZooepidemicus


Habitat:


Commensal or obligate pathogens of skin


Where can infection occur?


ExogenousEndogenous


Virulence factors of Strep


HemolysinStreptokinaseHyaluronidase


Zoonotic Sp of Strep:


S agalactiaeS dysgalactiaeS uberis


S canis infects:


DogsCats


S suis infects


pigs


Sp of Strep that infects cattle:


S agalactiaeS dysgalactiaeS uberis


S equi causes:


Strangles


Characteristics of S Canis Dz's:


PyogenicSepticemic


S canis causes:


puppy stranglesJuvenile pyodermalymphadenitisTSSSepticemia in kittens


S equi, subsp. equi causes:


pharyngitislymphadenitisinhalation pneunomia


Appearance of S equi on BA


Mucoid B hemolytic olonies


S equi is transmitted via


Fomites


Pathogenesis of S equi


Enters through mouth/noseattaches to tonsillar crypt mucosa-> LN=> Swelling/pusOcclusion of Resp pathway


How does S equi become highly infectious?


Rupture of submandibular LN


S suis causes


Septicemia in piglets


S porcinus causes


Jowl Abscesses


What causes chronic mastitis in cattle?


S agalactiae


What causes acute mastitis in cattle?


S dysgalactiaeS uberis


What are the symptoms of Strangles(5)?


FeverNasal DischargeSwollen head/neck LNCoughDifficulty Swallowing


Chronic Strangles is called


Bastard Strangles


Symptoms of Bastard Strangles


Weight LossDyspneaAbscesses


Tx for Strangles


PenIsolation


S suis clinical Dz's (5):


MeningitisArthritisSepticemiaPneumonieEndocarditis


Dx for S suis:


SmearCultureTyping


Tx for S Suis:


PenAmpicillin


Prevention of S suis?


Reduce StressVx w/ bacterins


Which type of S suis is the most virulent?


Type 2


Which mastitis causing bacteria are CAMP+?


S agalactiae


Which mastitis causing bacteria are a hemolytic?


S dysgalactiae dysgalacticaeS uberis


S agalactiae infects which anatomical locations?


Exclusively mammary


What anatomical Locations does S dysgalacticae dysgalacticae infect?


Mammary (acute)Buccal CavityGenitaliaSkin of udder


What anatomical Locations does S uberis infect?


TonsilsVaginaFecesMastitis


Multipoint Mastitis Control Program:


1. Clean/Dry environment2. Sanitizing/maint. of milking equip3. Aseptic teat care4. Dry-cow therapy5. Somatic Cell Count/Culling


Drugs used to Tx Strep causing Mastitis:


PenCloxacillin(same for staph mastitis)


Agent for Jowl abscesses in pigs?


S porcinus


S porcinus is AKA:


Streptococcal lymphadenitisStrangles in hogs


Drugs used to Tx S porcinus


Tetracyclines in feed at weaning(Vx not effective)


S _____ causes purpura and gangrenous changes in leg


suis