Diagnosis & Testing Methods

This section includes research on standardized skin surface biopsy, repeated sampling, dermoscopy, direct microscopic examination, PCR, lash sampling, false negatives, and mite-density thresholds.

Two Consecutive Standardized Skin Surface Biopsies: An Improved Sampling Method to Evaluate Demodex Density as a Diagnostic Tool for Rosacea and Demodicosis

Diagnostic Study SSSB / Diagnosis

This study evaluated two consecutive standardized skin surface biopsies in more than 1,000 patients and found that combined biopsy criteria had high sensitivity and specificity for confirming rosacea or demodicosis.

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Which factors influence Demodex mite density in standardized superficial skin biopsy in patients with rosacea?

Prospective Cross-sectional Study SSSB / Mite Density

This 2024 study evaluated factors that influence Demodex mite density in patients with rosacea and found that repeated SSSB testing increased cumulative detection rates.

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Limitations of standardized skin surface biopsy in measurement of the density of Demodex folliculorum

Case Report False Negatives / Testing Limitations

This paper explains that a single standardized skin surface biopsy may miss mites and produce false negative results.

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Comparison of the two techniques for measurement of the density of Demodex folliculorum: standardized skin surface biopsy and direct microscopic examination

Diagnostic Comparison Study SSSB vs Direct Microscopy

This study compared standardized skin surface biopsy and direct microscopic examination in patients with suspected demodicosis.

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Scale and Pustule on Dermoscopy of Rosacea: A Diagnostic Clue for Demodex Species

Dermoscopy Study Noninvasive Diagnosis

This study evaluates whether dermoscopic features may help identify Demodex-positive rosacea samples.

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