Actinobaculum and Trueperella Flashcards
What type of bacteria is Actinobaculum suis?
it is an obligate anaerobe
Where is Actinobaculum suis present?
on external urethral mucosa
What type of infection does Actinobaculum cause?
ascending infection
What lesion does Actinobaculum suis cause in swine?
pyelonephritis and ammonia production
What swine are particularily susceptible to Actinobaculum suis?
pregnant ones - periparturient
What did Trueperella pyogenes used to be called?
Corynebacterium, Actinomyces and Arcanobacterium
Where is Trueperella pyogenes distributed around the world?
pretty much the whole world
What is the morphology of Trueperella pyogenes?
small slender rods, short, sometimes tapered, and non-encapsulated (‘chinese letters’)
What do the colonies of Trueperella pyogenes look like?
typical, small to tiny colonies with a distinct zone of beta hemolysis that may develop late
Is Trueperella pyogenes catalase negative or positive?
negative
What a test that helps identify Trueperella pyogenes?
Casein - plate it and it digests it or litmus milk (acid-coagulation peptonization)
What is an important virulence factor for T. pyogenes?
pyolysin
What is pyolysin?
it is a cholesterol-binding cytolysin
What does T. pyogenes cause in cattle?
chronic abscessing mastitis, suppurative pneumonia, abscesses in peritoneal and thoracic cavity
What is T. pyogenes infection often associated with?
trauma, arthritis, abortion and uterine infections, pneumonia in shipping fever, umbilical infections, and as a synerist with Fusobacterium necrophorum and other organisms with mixed infections (foot rot)
What does T. pyogenes cause in swine?
pneumonia (secondary) and joint infections
What does T. pyogenes cause in sheep and goats?
mastitis, pneumonia, and superficial and deep abscesses
What does T. pyogenes cause in dog?
occasional pneumonia - secondary invader in thoracic lesions
What does T. pyogenes cause in farmed deer?
open sores on the legs or base of the antlers, abscesses of the brain, mouth, legs, and lymphnodes are common. Lameness and pneumonia can be fatal
Is immunity possible in T. pyogenes?
not really - immunity is poor following infection
How do you treat T. pyogenes?
drain abscesses if possible or use penicillin
