Unit 1- Actinobacteria

Question 1

Veterinary Actinobacteria

Answer 1

Actinomyces, actinobactulum, arcanobacterium, trueperella pyogenes, nocardia, dermatophilus

Question 2

Actinobacteria

Answer 2

Gram positive, slow growth, filamentous, fastidious, opportunistic

Question 3

Arcanobacterium pyogenes Predilection

Answer 3

Nasopharyngeal mucosa

Question 4

Actinobaculum suis Predilection

Answer 4

Preputial mucosa

Question 5

Actinomyces bovis Predilection

Answer 5

Oropharynx mucosa

Question 6

Actinomyces hordeovulneris Predilection

Answer 6

Unknown

Question 7

Arcanobacterium pyogenes Disease

Answer 7

Abscess, mastitis, suppurative pneumonia, endometritis, pyometra, arthritis, umbilical infection

Question 8

Arcanobacterium pyogenes Colonies

Answer 8

Coryneform, aerobic

Question 9

Trueperella pyogenes

Answer 9

Gram positive, pleiomorphic, non-spore forming, non-motile, non-capsulated, facultative anaerobic, fermentative, proteolytic, rod

Question 10

Trueperella pyogenes Infection

Answer 10

Mechanical injury of skin and mucous membrane, causes suppurative lesions

Question 11

Trueperella pyogenes Vaccines

Answer 11

Whole cells, culture, recombinant, DNA, or autovaccine

Question 12

Actinomyces viscosus

Answer 12

Canine actinomycosis, subcutaneous lesions and fibrovascular proliferation on peritoneal or pleural surfaces, causes respiratory distress

Question 13

Actinomyces bovis

Answer 13

Bovine actinomycosis, trauma of the bone or oral cavity causes swelling of the bone and fistulous tracks

Question 14

Actinobaculum suis

Answer 14

Porcine cystitis, anorexia, back arching, dysuria, hematuria, and kidney damage in prepuce

Question 15

Nocardia spp.

Answer 15

Gram positive, aerobic, filamentous saprophytes that grow on blood agar with charcoal, hemolytic

Question 16

Nocardia Subculture

Answer 16

Culture on Sabourand dextrose agar, will be dry, wrinkled, and orange

Question 17

Nocardia Infections

Answer 17

Imunosuppression predisposes, cutaneous and systemic infection in dogs, sporadic mastitis in cattle, and abortion in sows

Question 18

Canine Nocardiosis

Answer 18

Infection by inhalation, wound, or ingestion, thoracic, cutaneous, or disseminated forms

Question 19

Thoracic Canine Nocardiosis

Answer 19

Fibrovascular proliferation on pleura and sanginopurulent fluid in cavity

Question 20

Cutaneous Canine Nocardiosis

Answer 20

Ulcer or granulomatous swelling with fistulous tracts

Question 21

Disseminated Canine Nocardiosis

Answer 21

Nonspecific clinical signs in dogs less than 12 months

Question 22

Bovine Farcy

Answer 22

Nocardia farcinica, chronic infection of superficial lymphatics and lymph nodes, lesions resemble tuberculosis

Question 23

Dermatiphilus congolensis

Answer 23

Gram positive, filamentous, produces motile coccal zoospores that persist in the skin

Question 24

Dermatophilus congolensis Infection

Answer 24

Zoospores transmitted by contact or vector, rainfall and wet conditions, lesions can cause death

Question 25

Corynebacterium

Answer 25

Gram positive, fastidious, non spore forming, cause suppurative lesions after tissue trauma

Question 26

Corynebacterium Colonies

Answer 26

Small white colonies, hemolysis varies

Question 27

Caseous Lymphadenitis

Answer 27

Caused by Corynebacterium bovis and Corynebacterium paratuberculosis

Question 28

Bovine pyelonephritis

Answer 28

Caused by Corynebacterium renale

Question 29

Ulcerative Balanoposthitis

Answer 29

Caused by Corynebacterium renale

Question 30

Rhodococcus equi

Answer 30

Gram positive intracellular opportunistic pathogen causing suppurative bronchopneumonia of foal

Question 31

CAMP Test

Answer 31

Rhodococcus equi and Staph aureus are streaked on a plate and create a spade of complete hemolysis where the staph was streaked

Question 32

Rhodococcus equi Clinical SIgns

Answer 32

Fever, anorexia, and pronchopneumonia

Question 33

Mycobacteria

Answer 33

Non spore formine, aerobic, rod shaped, acid fast (Ziehl-Neelsen positive), saprophytes resistant to adverse conditions

Question 34

Mycobacteria Infections

Answer 34

Tuberculosis in avian and mammal, paratuberculosis in ruminant, feline leprosy, skin tuberculosis, bovine farcy, granulomatous lesions

Question 35

Cattle Tuberculosis

Answer 35

M bovis spread by wildlife

Question 36

Tuberculosis Pathogenesis

Answer 36

Bacteria in respiratory tract travel to lung, survive and multiply in macrophages, accumulate in lung and form granulomas, also transported to lymph nodes

Question 37

Tuberculosis Clinical Signs

Answer 37

Loss of condition, cough, pyrexia, induration, supramammary lymph node enlargement, mastitis

Question 38

Tuberculosis Diagnosis

Answer 38

Tuberculin, interferon assay, ELISA, ZN staining

Question 39

Tuberculin Test

Answer 39

Can have false positives, false negatives, and cross reactions

Question 40

Avian Tuberculosis

Answer 40

M avium affects adult birds, dullness, emaciation, lameness, and granuloma

Question 41

Feline Leprosy

Answer 41

M. lepraemurium spread from rat bites, nodular lesions in subcutaneous tissues

Question 42

Paratuberculosis

Answer 42

Johne’s disease, M avium paratuberculosis, oral ingestion from feces, common in calves

Question 43

Johne’s Pathogenesis

Answer 43

Intracellular pathogen in macrophages, causes granuloma in GI, enteropathy leads to loss of protein and malabsorption in GI

Question 44

Johne’s Clinical Signs

Answer 44

Clinical signs appear around 2, persistent diarrhea, thickened intestinal mucosa

Question 45

Johne’s Diagnosis

Answer 45

Johnin intradermal, PCR, microscopy, isolation

Question 46

Mallein Test

Answer 46

Burkholderia mallei

Question 47

Histoplasmin Test

Answer 47

Histoplasmosis

Question 48

Coccidioidin Test

Answer 48

Coccidiomycosis