Nocardia Flashcards
gram
positive
respiration
aerobic
saphrophytic?
yes
morphology
filamentous
culture media
blood agar
culture media with charcoal yeast extract
colony description
white
powdery
firmly adhere to agar
hemolytic?
variable hemollytic
odor?
odorless
growth on sabouraud dextrose agar
yields dry wrinkled orange colored colonies after incubation for up to 5 days
clinical infections
dogs – cutaneous and systemic infections
cattle – mastitis (sporadic)
immunosuppression an important predisposing factor
disease conditions in dogs
canine nocardiosis
cutaneous pyogranulomas
pyogranulomatous pleural lesions and pyothorax
dissemiated lesions
disease conditions in cows
chronic mastitis
abortion
bovine farcy
disease conditions in pigs
abortion
disease conditions in sheep, goat, horse
wound infections
mastitis
pneumonia
other pyogranulomatous conditions
canine nocardiosis transmission
inhalation
through skin
ingestion
forms of canine nocardiosis
thoracic
cutaneous
disseminated
symptoms of canine nocardiosis
fever
anorexia
respiratory distress
fibrovascular proliferative reaction on pleura
sanguinopurulent fluid accumulation in thoracic cavity
cutaneous form of canine norcardiosis
ulcer
granulomatous swelling
discharging fistulous tracts
disseminated form of canine nocardiosis
in dogs less than 12 months
clinical signs non specific
treatment of canine nocardiosis
amikacin
cotrimoxazole
what causes bovine farcy (bovine nocardiosis)
nocardia farcinica
where is bovine nocardiosis limited to
tropics
what is bovine nocardiosis
chronic infection of superficial lymphatic vessels and lymph nodes
bovine nocardiosis lesions
small cutaneous nodules – enlarge slowly and coalesce to form swellings (rarely ulcerate)
why is bovine nocardiosis important
lesions resemble those of tuberculosis
