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===''Actinobaculum suis''===
===''Actinobaculum suis''===
*Found in preputial mucosa of healthy boars
*Anaerobic
*Coryneform morphology
*Produces urease
*3mm diameter colonies with shiny raised centre and dull edge
*Disease transmitted at coitus
*Sows develop disease within 3-4 weeks of mating
*Produces lesions in urinary tract of sows
*Cystitis and pyelonephritis in sows
*Anoreixa, arching of back, dysuria and haematuria
*May be fatal
===''Dermatophilus congolensis''===
===''Dermatophilus congolensis''===
*Filamentous, branching actinomycete
*Aerobic
*Aerobic
*Motile zoospores
*Produces motile zoospores
*No growth on Sabouraud dextrose agar
*No growth on Sabouraud dextrose agar
*Found in scabs and in foci on skin of carrier animals
*Dermatophilosis most prevalent in tropical and subtropical regions
*Organisms found in scabs and in foci in skin of carrier animals
*Dormant zoospores become activated when moisture and temperature levels favourable
*Zoospores may survive 3 years in scabs
*Pathogenicity:
**Does not usually invade healthy skin
**Entrance after trauma or persistent wetting
**Activated zoospores produce germ tubes which develop into filaments which invade the epidermis
**Invasion causes an accute inflammatory response with many neutrophils
**Microabscesses are formed in the skin