A Microbiologist Is Reading the Plates from a Sputum Culture

question 8

Multiple Choice

A microbiologist is reading the plates from a sputum culture. The culture is from a patient with cystic fibrosis. One organism dominates the blood agar, chocolate, and MacConkey plates. The MacConkey plate shows an organism with a green pigment and a metallic sheen. The probable identification for this organism is

• A) Pseudomonas aeruginosa.
• B) Serratia marcescens.
• C) Chromobacterium violaceum.
• D) Prevotella melaninogenica.

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Definitions:

Total Number

The sum or total count of units or elements in a set or group.

Data Set

A collection of data points or values gathered from experiments or observations.

Classes

Categories or groups into which data can be divided based on certain characteristics or attributes.

Relative Frequencies

The measures showing the number of times a certain event occurs in relation to the total number of events, often expressed as a percentage or fraction.