Test 2: Filamentous Bacteria (Gram +) Flashcards
What are the 4 members of the genera
Filamentous Bacteria?
- Streptobacillus*
- Actinomyces*
- Nocardia*
- Dermatophilus*
- SAND*
What is the most common species of
Nocardia?
Nocardia asteroides
Where are *Nocardia *found?
Soil and Water
How is *Nocardia *transmitted?
Inhalation, Trauma, and Ingestion
Bovine mastitis and Bovine Farcy can be caused by which filamentous bacteria?
Nocardia
Consistently involved lymph nodes
is a feature of the pathogenesis of which filamentous bacteria?
Nocardia
A chronic suppurative infection that starts in the lower limbs of a cow is called
Bovine Farcy
A cow is from the tropics and has lesions on its lower limbs that are discharging pus (suppurative). A few hours ago, this cow aborted a fetus and the farmer saved the placenta. The placenta is covered with multiple foci of white purulent exudates.
Upon examination of the fetus, you notice that its lungs have abcesses.
What is this disease called?
Bovine Farcy
A cow is from the tropics and has lesions on its lower limbs that are discharging pus (suppurative). A few hours ago, this cow aborted a fetus and the farmer saved the placenta.
The placenta is covered with multiple foci of white purulent exudates.
Upon examination of the fetus, you notice that its lungs have abcesses.
What can cause this disease?
- Nocardia farcinica*
- Mycobacterium farcinogenes*
- Mycobacterium senegalense*
A cow is from the tropics and has lesions on its lower limbs that are discharging pus (suppurative). A few hours ago, this cow aborted a fetus and the farmer saved the placenta.
The placenta is covered with multiple foci of white purulent exudates.
Upon examination of the fetus, you notice that its lungs have abcesses.
Lab work comes back and you find out that the causative agent is Aerobic, Gram +, and Partially Acid-Fast.
Definitively, you can ID the pathogen. What is it?
Nocardia farcinica
In horses, it is the disease that appears to be Nocardiosis and causes abortion, but is actually caused by
Crossiella equi
Nocardioform placentitis
What is the causative agent of Mandibular Osteomyelitis (Lumpy Jaw) in Cats?
Nocardia cyriacigeorgica
In a feline patient, you take a radiograph and notice an
irregular mineralized mass in its right mandible.
You know this is characteristic of Mandibular Myelitis or Lumpy Jaw caused by Nocardia cyriacigeorgica
but it is also characteristic of 4 other disease processes.
What is your DDx?
Osteosarcoma
Chondrosarcoma
Osteoma
Odontoma
Honeycomb appearance of the bone
is associated with
Mandibular Osteomyelitis
(Lumpy Jaw)
caused by
Nocardia cyriacigeorgica
Morphologically, how do you tell the difference between
Nocardia and Actinomyes?
YOU CAN’T!
They are morphologically indistnguishable
Pathogenic Nocardia
are
_______ anaerobes
obligate anaerobes
Where can you find
Actinomyces?
Oral mucous membranes and tooth surfaces
“If you want to be an ACTor, you have to SMILE”
Actinomyces causes Lumpy Jaw in which species?
COWS and other ruminants
*Nocardia *causes Lumpy Jaw in which species?
CATS
Which bacteria is most likely to cause Lumpy Jaw that disseminates?
Nocardia
Lumpy Jaw that DOES NOT disseminate is caused by which bacteria?
Actinomyces
In histology, you see Horse-shoe shaped surfur granules
from a sample of a discharging sinus tract. What bacteria is it?
Actinomyces bovis
In horses, lesions caused by
Supra-atlantal bursitis (Poll Evil)
or
Supraspinous bursitis (Fistulous Withers)
usually contain which bacteria?
Actinomyces
This bacteria is associated with Dogs and Cats
and is a common isolate of suppurative serositides in small carnivores.
Actinomyces viscosus
Sulfur granules are more common in lesions caused by which filamentous bacteria?
Actinomyces
