Filamentous Bacteria - Exam 2 Flashcards Preview

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Flashcards in Filamentous Bacteria - Exam 2 Deck (20):
1

What is the most common species of Nocardia?

Nocardia asteroides

2

What is the generalized pathogenesis of Nocardia?

Generalized suppurative and pyogranulomatous process

3

Who is most susceptible to Nocardia?

Immunosuppressed and massively exposed individuals

4

Which structure is consistently involved with Nocardia infection?

Lymph nodes

5

Which filamentous bacteria is associated with bovine farcy?

Nocardia

6

Which filamentous bacteria has been identified as the causative agent of mandibular osteomyelitis (lumpy jaw) in cats?

Norcardia cyriacigeorgica

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7

How would you control the spread of Nocardia?

Removal of infected animals

Disinfection of premises and equipment

Scrupulous stabling and milking hygiene

8

What is the reservoir for Actinomyces?

Found on oral mucous membranes, tooth surfaces and mucous membranes of the urogenital tract and secondarily GIT

Endogenous infection

9

What kind of reactions do actinomyces evoke?

Pyogranulomatous reactions

10

What is the condition Actinomyces causes in ruminants?

Lumpy jaw!

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11

How do the lesions of Nocardia and Actinomyces differ?

Actinomyces lesion expands but has little tendecy for vascular dissemination

Difference to Nocardiosis

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12

Which filamentous bacteria causes cervical lymphadentis in horses?

Actinomyces

Would be lower on DDx 

(similar to S. equi subs. equi)

13

Which filamentous bacteria is the most common agent for infection of dog and cat bites?

Actinomyces viscosus

14

What are the characteristics for diagnosis of Actinomyces?

Sulfur granules

Crushed granules, exudate or tissue impressions are stained - Gram-positive diphteroids, non-acid fast, majority are catalase negative

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15

Which type of filamentous bacteria causes dermatophilosis or streptothricosis in cattle?

Dermatophilus congolensis

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16

Which filamentous bacteria causes rain scald, ran rot or grease heal in horses?

Dermatophilus congolensis

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17

Which filamentous bacteria causes strawberry footrot and lumpy wool in sheep?

Dermatophilus congolensis

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18

What is the disease pattern for Dermatophilus in livestock?

 

Creates an exudative epidermitis

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19

What stain is used for Dermatophilus congolensis?

Giemsa stain

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20

What other filamentous bacteria was listed in the powerpoint but not elaborated on?

Streptobacillus