Ancylostoma duodenale is an intestinal hookworm. Adult hookworms attach to the small-intestinal lining, and infection can contribute to blood loss. A stool result can help an investigation, but it does not measure how much iron has been lost or diagnose anemia.
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Why this hookworm matters
Hookworm infection can be asymptomatic, while heavier infection may cause abdominal symptoms and iron-deficiency anemia. Soil exposure and relevant travel or residence help establish context. A person can have an infection without seeing an adult worm in stool. [1]
What GI-MAP reports
The panel includes an A. duodenale target, separately from Necator americanus. Detection concerns the target in the submitted specimen; it does not count adult worms, date the exposure or measure hemoglobin. [2]
What a detected result should prompt
Ask a clinician whether confirmation and a blood count or iron assessment are appropriate. Fatigue or weakness has many causes, so a stool finding does not prove hookworm is responsible for every symptom. If infection is confirmed, treatment and follow-up should be selected by the clinician.
A negative A. duodenale result does not exclude every hookworm species or every stage of infection. Species coverage, timing and the clinical suspicion determine whether another stool method or additional samples are useful.
Why species identification has limits
Routine microscopy can identify hookworm eggs but cannot reliably distinguish A. duodenale from N. americanus by egg appearance alone. Molecular methods and microscopy provide different kinds of information. A named molecular finding should still be interpreted using the assay’s actual coverage. [1]
Common questions
Does a positive result prove I am anemic?
No. Anemia and iron status require appropriate clinical and blood-test assessment.
Can I calculate the number of worms from GI-MAP?
No. A molecular result is not a validated adult-worm count or a direct measure of blood loss.
Sources and review
Sources checked October 7, 2026. Manufacturer material describes the test; clinical guidance and research support the interpretation limits.
- CDC DPDx: Intestinal hookworm
- Diagnostic Solutions Laboratory: GI-MAP interpretive guide (manufacturer specifications)
Medical review of this article is pending. For a correction or source question, contact GI MAP Test.