A 29-year-old male was seen by his primary care physician for a large boil located on his neck. The physician lanced the boil and expressed a large amount of pus. A sample was sent to the laboratory for culture.
The culture yielded heavy growth of a yellow pigmented, beta-hemolytic colony. The Gram stain revealed gram-positive cocci in clusters. The organism was catalase positive and Staphylococcus latex agglutination negative. You would:
A) boil a suspension of the organism and repeat the latex agglutination test.
B) perform a thermonuclease test.
C) report the organism as normal skin flora.
D) report the organism as Staphylococcus aureus.
Question 2
A small, slender, gram-negative rod was recovered from the blood cultures of a patient following root canal surgery. At 48 hours, the following results were observed:
BAP and CHOC agars: small gray colonies that tend to pit the agar
MAC agar: no growth
Odor upon opening the agar plates: bleach-like
This organism will also be
A) catalase negative and oxidase positive. B) catalase and oxidase negative.
C) catalase and oxidase positive. D) catalase positive and oxidase negative.
Herbivore biomass is positively correlated with net aboveground primary production.
Primary production increases with an increase in total phosphorus concentration.
A male and female fat-tailed gerbil (Pachyuromys duprasi)
A 5,000-year-old Egyptian garment