Malaria Thick Film Parasite Count per 200 WBC Field Standardizer
Standardize observed thick-film counts to 200 counted WBC; does not assume a blood WBC concentration.
Description
Standardize observed thick-film counts to 200 counted WBC; does not assume a blood WBC concentration.
Counts made against different numbers of white blood cells can be expressed on a common per-200-WBC basis. That standardized ratio is not automatically a concentration per blood volume.
When to use this tool
Standardize observed thick-film counts to 200 counted WBC; does not assume a blood WBC concentration.
- Prepare the supplied parasitesCounted, wbcCounted fields for this operation.
- Compare the complete example with the representation used by your own input before carrying the result into another step.
How to use the tool and how it works
- Enter parasitesCounted, wbcCounted. Use the exact text syntax, units and index conventions explained below.
- Run the tool. If input validation fails, correct the supplied fields before interpreting any result.
- Read result.standardizedParasitesPer200Wbc. Interpret false, null and empty lists using the distinctions below; they can be valid outputs.
Require nonnegative integer parasitesCounted and positive wbcCounted. Return 200*parasitesCounted/wbcCounted as standardizedParasitesPer200Wbc.1
| Input field | Meaning and representation | Accepted input |
|---|---|---|
| parasitesCounted | parasites counted. | Integer from 0 to 1e9 inclusive |
| wbcCounted | wbc counted. | Finite number; greater than zero |
| Output field | Interpretation |
|---|---|
| result | Object containing the named outputs below. |
| result.standardizedParasitesPer200Wbc | The standardized parasites per200 wbc value under the stated formula or text convention. |
{
"input": {
"parasitesCounted": 10,
"wbcCounted": 100
},
"output": {
"result": {
"standardizedParasitesPer200Wbc": 20
}
}
}Limitations and assumptions
- The result can be fractional because it is a rescaled ratio, not a newly observed count. No WBC concentration, per-microlitre estimate or clinical severity is inferred.
- Every declared top-level field is required and unexpected fields are rejected. Numeric inputs must be finite; ordinary text fields are bounded to 8,192 UTF-16 code units, with tighter operation-specific limits where stated.
- Ordinary string lists have at most 128 entries of at most 128 code units each; numeric lists and matrices have separate bounded size checks. Nonfinite results and excessively large serialized outputs are rejected.
- Indexes are zero-based and spans have an exclusive end unless explicitly stated otherwise. A valid false, null or empty-list result is distinct from malformed input.
Alternative or Complementary methods
Combine recorded observations with a validated method, appropriate controls and the complete specimen context. Use original qualified references when reviewing species, stages or product information; a supplied-record match, sample ratio or historical flag is only the stated piece of evidence.
References
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