30 - Flashcards

1
Q

Corynebacterium - Habitat, morphology, staining and culture. biochemistry

A

mucous membranes, skin, soil and milk (animal pathogens are saprophytes) some plant pathogenic.
Polymorphic.
Gram positive slightly acid fast. metachromic granules stain strongly
blood agar haemolysis, weak on nutrient.
Catalase + ox - fermentative.

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2
Q

Corynebacterium - species

A

C. diphtheriae - hu diftery
C. pseudotuberculosis
N-negative - PTB, Caseous lympandentis, abortion
N-positive - eq ulcerative lymphandentis.
C. renale - pyelitis and cystitis
C. pilosum - pyelitis and cystitis
C. cystidis - cystitis
C. bovis - mastitis and abortion found in milk and udder

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3
Q

Norcardia

A

Soil saprophytes, branched filaments, no flagella wrinkled colonies.
obligate aerobic
caretenoid pigment
non fastidious 3-5days
Facultative pathogens
N. asteroidus chronic supination and mastitis in cattle.

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4
Q

Actionmyces

A

alimentary tract, branching filaments,
broken sulpher granules in pus but not on culture.
Facultative anaerobic apart from actinomyces israeli is obligate.
facultative pathogen
A. bovis - lumpy jaw, pig udder actinomycosis
A. viscosus hu dog
A. israeli hu
A. hordeovulneris dog

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