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Five molecular detections do not reveal an introduction route
The evidence library is allowed to change in public. This page preserves the revised boundary, why it moved and which guides were affected.
What changed
The health and surplus guides now include the 2025 La Reunion Island field survey while separating occurrence in three samples from aquarium prevalence, clinical disease, parasite origin, transmission and a traced release event.
Why it changed
The study tested 40 Neocaridina davidi at each of three sites on one date and reported five positives representing four microsporidian sequence types. It reported no histology, lesions, clinical signs, survival, experimental transmission, pathogenicity or treatment endpoint, did not test native shrimp for parasites and contains one inconsistent immature subgroup denominator.
Sources reviewed for this change
Affected practical guides
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