Skin Scraping Mite Density
Normalize observed mites by measured skin-scraping area.
Description
A skin-scraping count depends on the area examined.
A skin-scraping count depends on the area examined. An area-normalized density lets observations of different sizes be compared on the same units.
The tool returns mitesPerCm2 (mites per cm 2). Input measurements and model parameters are supplied by the caller; the tool computes the stated summary rather than acquiring those measurements.
When to use Skin Scraping Mite Density
Use Skin Scraping Mite Density when you already have mitesCounted, scrapedAreaCm2 and want mitesPerCm2. This is useful for checking a supplied calculation, documenting a measurement convention, or comparing observations prepared on the same basis.
How to use Skin Scraping Mite Density and understand its results
- Enter mitesCounted, scrapedAreaCm2 using the field table below. Match the units, ordering and data boundaries described in the calculation.
- Run the tool after checking the stated bounds and matching paired observations or categories. A malformed request gives a tool error rather than a usable measurement.
- Read mitesPerCm2. Use the calculation and interpretation below to distinguish amounts, ratios, signs and decision flags where applicable.
- Review the supplied parameters and assumptions before using the result in a report or comparing it with another observation.
| Input field | Meaning | Value type and bounds | Requirement |
|---|---|---|---|
| mitesCounted | Mites counted | integer | Required |
| scrapedAreaCm2 | Scraped area cm 2 | number | Required |
Require a nonnegative integer count and a positive sampled area, then divide to obtain mites per square centimetre.
mite density = miteCount / scrapedAreaCm² The symbols refer to the supplied quantities or generated values described above; unit conversions and comparison boundaries follow the stated implementation.
{
"input": {
"mitesCounted": 20,
"scrapedAreaCm2": 2
},
"output": {
"mitesPerCm2": 10
}
}Limitations and assumptions
Sampling site, scraping depth and detection efficiency are not corrected; a zero observed count does not rule out infestation.
Numerical inputs must be finite. The tool checks its declared input shape and calculation constraints; those checks do not verify the quality, calibration or representativeness of the supplied observations.
Alternative or Complementary methods
Tick Engorgement Multiplier: Compare fed and unfed tick mass as an engorgement ratio and mass gain. Flea Comb Capture Yield: Summarize adult flea captures per comb pass and per examined animal.
Methodological background: DPDx: diagnostic procedures.1
References
-
DPDx: diagnostic procedures — Centers for Disease Control and Prevention
Similar or alternative tools
- Tick Engorgement Multiplier
Compare fed and unfed tick mass as an engorgement ratio and mass gain.
- Flea Comb Capture Yield
Summarize adult flea captures per comb pass and per examined animal.