Hydrogen Sulfide Black Precipitate Positive Detector
Record independently observed Hydrogen Sulfide Black Precipitate Positive Detector evidence with explicit knownness and valid controls. Does not inspect images, infer species, diagnose infection or recommend treatment.
Description
Record supplied black-precipitate evidence without measuring a reaction or identifying an organism.
Black precipitate can be recorded as a reaction feature in a qualified assay context. Its presence alone does not supply a complete biochemical identification.
When to use this tool
Record supplied black-precipitate evidence without measuring a reaction or identifying an organism.
- Prepare the supplied blackPrecipitate, observationKnown, controlValid 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 blackPrecipitate, observationKnown, controlValid. 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.assayObservation, result.diagnosticConclusion. Interpret false, null and empty lists using the distinctions below; they can be valid outputs.
Supply blackPrecipitate as true for the observed feature or false for its observed absence, together with explicit observationKnown and controlValid booleans. Return assayObservation indeterminate if observationKnown is false or controlValid is false; otherwise return positive when blackPrecipitate is true and negative when false. Return diagnosticConclusion as not-established in every case. No image processing or measurement is performed.1
| Input field | Meaning and representation | Accepted input |
|---|---|---|
| blackPrecipitate | Explicit choice for black precipitate; supply a boolean rather than a text label. | true or false |
| observationKnown | True only when the feature observation is actually known; false preserves an indeterminate/unknown outcome. | true or false |
| controlValid | Whether the relevant assay control or observation-validity condition is established. | true or false |
| Output field | Interpretation |
|---|---|
| result | Object containing the named outputs below. |
| result.assayObservation | Positive or negative only when both observation and control validity are established; indeterminate otherwise. |
| result.diagnosticConclusion | Always not-established: the recorded feature does not establish a diagnosis. |
{
"input": {
"blackPrecipitate": true,
"observationKnown": true,
"controlValid": true
},
"output": {
"result": {
"assayObservation": "positive",
"diagnosticConclusion": "not-established"
}
}
}Limitations and assumptions
- No medium, precipitate or hydrogen-sulfide production is measured. blackPrecipitate is entered by the caller and the result does not confirm organism identity or diagnosis.
- 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
Retain specimen context, controls and independently observed features alongside a test label. Use a complete validated identification or analytical workflow when conclusions require several assays; a single stored morphology definition, feature flag or threshold comparison does not identify an organism.
References
Similar or alternative tools
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