Which observation should be avoided in morphology reporting to prevent false positives?

Which observation should be avoided in morphology reporting to prevent false positives?

• A. Hyphae do not grow geometrically (e.g., sharp acute or right angles)
• B. Cell wall skeletons
• C. Hyphae with uniform size and symmetry
• D. Mosaics and other artifacts such as cholesterol deposits

Answer: (D)

Mosaic patterns and artifacts like cholesterol deposits should be avoided in morphology reporting because they are not real features of the organism and can masquerade as genuine structures, leading to a false positive. Artifacts arise from sample preparation, staining, and mounting and can appear as irregular, mosaic-like patches that mimic structural elements. Focusing on true features—such as authentic hyphal branching patterns, septation, and consistent cell-wall appearance—helps ensure accurate interpretation. If uncertainty arises, verify with multiple fields or alternate staining methods to avoid misidentification.

Mosaic patterns and artifacts like cholesterol deposits should be avoided in morphology reporting because they are not real features of the organism and can masquerade as genuine structures, leading to a false positive. Artifacts arise from sample preparation, staining, and mounting and can appear as irregular, mosaic-like patches that mimic structural elements. Focusing on true features—such as authentic hyphal branching patterns, septation, and consistent cell-wall appearance—helps ensure accurate interpretation. If uncertainty arises, verify with multiple fields or alternate staining methods to avoid misidentification.