A Microbiologist Is Reading the Plates from a Sputum Culture

question 3

Multiple Choice

A microbiologist is reading the plates from a sputum culture. There is growth only on the chocolate plate. When the microbiologist takes off the lid of the culture plate, he notices a distinct "mousy" smell. What organism can this be?

• A) Proteus mirabilis
• B) Haemophilus sp.
• C) Staphylococcus aureus
• D) Pseudomonas aeruginosa

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Definitions:

Cleavage

1. The tendency of minerals to break along specific orientations of closely spaced planes. 2. The tendency of a rock, especially a metamorphic rock, to split along mostly parallel planes.

Luster

The reflection of light from the surface of a mineral, especially its quality and intensity; the appearance of a mineral in reflected light.

Color

A property of light as seen by people, typically defined by its wavelength or frequency.

Crystals

Solid materials whose constituents, such as atoms, molecules, or ions, are arranged in a highly ordered microscopic structure.