Porcine Flash - Streptococcal Infections Flashcards
what are 4 predisposing factors for s. suis infection in newly weaned pigs?
stress, temperature fluctuations, poor environmental hygiene, & high humidity
what are 5 common clinical signs of s. suis infection in a weanling pig?
fever, meningitis, endocarditis, polyarthritis, & bronchopneumonia
what are 4 common findings on necropsy of a pig that died from a s. suis infection?
lymphadenopathy, meningitis, arthritis, endocarditis, & petechial hemorrhages
how can streptococcal infections be prevented in pigs?
strict biosecurity & sanitation protocols
minimize stress in newly weaned pigs & prevent skin trauma
vaccination, purchase from meningitis-free herds, & quarantine new additions
what age groups of pigs are most commonly affected by s. suis, s. dysgalactiae, & s. porcinus?
s. suis: nursing & recently weaned pigs <12 weeks old
s. dysgalactiae: piglets 1-3 weeks old
s. porcinus: growing pigs, usually diagnosed at slaughter
where is streptococcus suis present in the body of healthy pigs?
tonsils, nasal cavity, feces, & genital tracts
how do asymptomatic carriers transmit s. suis?
during movement & mixing of healthy carrier pigs post weaning
how is streptococcus suis transmitted?
vaginal secretions, milk from sow, fomites, flies, & contaminated feed
what are the main clinical signs seen in piglets with s. suis infections?
septicemia, fever, meningitis, polyarthritis, polyseritis, bronchopneumonia (peracute form) causes dead weanlings
what clinical signs are seen in piglets with s. dysgalactiae?
fever, arthritis, & meningitis
what clinical signs are seen in pigs with s. porcinus?
jowl abscesses in growing pigs usually diagnosed at slaughter
how are streptococcal infections diagnosed in pigs?
field diagnostics - history, clinical signs, age, & gross lesions
necropsy - bacterial culture & isolation
how are streptococcal infections treated?
early recognition & treatment most rewarding
abx, supportive care, anti-inflammatories (meningitis)
