Miselleneoud bacteria Flashcards

1
Q

Etiologic agent for rat-bite fever and Haverhill fever in humans
- Gram-negative bacillus that requires media containing blood, serum or ascites fluid

A

Streptococcus moniliformis

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2
Q

Known to develop L forms (bacteria without cell wall)

A

Streptococcus moniliformis

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3
Q

Shows extreme pleomorphism with long, looped, filamentous forms, chains and swollen cells –
highly pleomorphic bacteria
- Tendency to form long chains of bacilli with prominent yeast-like swelling described as
―”necklace-like, string of pearls or string of beads’

A

Streptococcus moniliformis

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4
Q

Non-encapsulated, non-hemolytic, non-motile, facultatively anaerobic
- Normally found in the oropharynx of wild and laboratory rats

A

Streptococcus moniliformis

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5
Q

stain is required to demonstrate the L-form colonies

A

Dienes stain

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6
Q

stain also reveals the bacteria when gram stain fails due to lack of cell wall
constituents

A

Acridine orange

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7
Q

Transmitted by 2 routes

A

Rat bite or by direct contact with rats
o By ingestion of contaminated food like unpasteurized milk or milk products and water

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8
Q

In broth cultures, organism grows as “puff balls of bread crumbs” near the bottom of the tube or
on the surface of the sedimented RBC in blood culture media

A

Streptococcus moniliformis

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9
Q

Colonies embedded in the agar may exhibit a “fried egg” appearance with a dark center a a
flattened, lacy edge.

A

Streptococcus moniliformis

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10
Q

Etiologic agent of bacterial vaginosis, considered a sexually transmitted disease
- It is part of the normal flora of anorectal adult
- Small, pleomorphic gram-variable or gram-negative coccobacilli or short rods; non-motile
- Colonies are small and B-hemolytic on media containing rabbit or human blood
- Oxidase and catalase negative

A

Gardnerella vaginalis

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11
Q

Etiologic agent of bacterial vaginosis, considered a sexually transmitted disease
- It is part of the normal flora of anorectal adult
- Small, pleomorphic gram-variable or gram-negative coccobacilli or short rods; non-motile
- Colonies are small and B-hemolytic on media containing rabbit or human blood
- Oxidase and catalase negative

A

Gardnerella vaginalis

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12
Q

large squamous epithelial cells with numerous attached
small rods

A

(+) clue cells

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13
Q

– vaginal secretions plus 1 drop of 10% KOH (pH
>4.5)

A

whiff test- (+) fishy amine odor

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14
Q

found in middle-aged men characterized by the presence of PAS staining
macrophages

A

Whipple‘s disease

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15
Q

Gram (+) actinomyces, not closely related to any other genus known to cause infection
- This microorganism cannot be cultured, it can be seen in macrophages but cannot be cultured

A

Tropheryma Whippelii

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16
Q

Formerly known as Calymmatobacterium granulomatis

A

Klebsiella granulomatis

17
Q

Causes granuloma inguinale or donovanosis

A

Klebsiella granulomatis

18
Q

STD, characterized by nodules that enlarge and evolve to form beefy,
erythematous, painless lesions that bleed easily

A

Donovanosis

19
Q

Stains as a blue rod with prominent polar granules, giving rise to a safety pin
appearance, surrounded by a large pink capsule

A

Klebsiella granulomatis

20
Q

Klebsiella granulomatis

A

Klebsiella granulomatis