Tropheryma whipplei is characterized by the presence of periodic acid–Schiff (PAS)–staining macrophages, which indicates mucopolysaccharide or glycoprotein, in almost every organ system. Without treatment, this disease is uniformly fatal. Identification is achieved using:
a. enzyme-linked immunosorbent assay (ELISA).
b. IFA.
c. immunoblotting.
d. real-time polymerase chain reaction (PCR).
D
T. whipplei is the organism that is characterized by the presence of PAS-staining macrophages, which indicates mucopolysaccharide or glycoprotein, in almost every organ system. The bacillus is observed in macrophages and affected tissues, but it has never been cultured. Detection of T. whipplei is limited to only a few laboratories using conventional and real-time PCR.
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A. their foot and mantle structures B. their endoskeleton C. their segmented body D. their fused appendages
The sequence in Figure 52-2 illustrates:a
classical conditioning. b. habituation. c. imprinting. d. insight. e. operant conditioning
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A) are the result of natural disasters. B) favor animals that prefer interior, forest habitat. C) often result from human activities. D) result in a significant increase in ecotourism.