A periodontal abscess is primarily composed of
A) bacteria, dental calculus.
B) bacteria, plasma cells, neutrophils.
C) bacteria, dead tissue, neutrophils.
D) dental calculus only.
C
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Which of the following BEST describes an extension ladder?
A. Equipped with folding hooks that anchor the ladder over the ridge of a pitched roof B. Designed to be used as a self-supporting stepladder, equipped with positive locking devices C. Comprised of a base section and one or more fly sections, can be adjusted to specific length needed D. Designed with hinged rungs that allow the ladder to be folded so that one beam rests against the other
Paroxysmal cold hemoglobinuria is confirmed by a positive:
a. Antibody class IgM. b. Thermal amplitude of antibody over 20 °C. c. Donath-Landsteiner test d. Cold agglutinin test.