Detached-worm persistence is not a quarantine clock

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 quarantine guides now include a complete open study of Holtodrilus body locations, cocoons, host-removed persistence and a small host-exchange demonstration on wild Neocaridina hosts.

Why it changed

The longest host-removed observation was 46 days in source river water without added food, but the containers differed, two worms are missing from the reported ranges, death criteria and controls were omitted and the animals were not identified to N. davidi. Persistence under that laboratory history does not validate a 46-day quarantine, while attachment and predation demonstrations do not establish transmission probability, safe tankmates, treatment efficacy or host harm.

Sources reviewed for this change

Affected practical guides

A public change is not automatically a retraction. A source may be added, a scope narrowed, a gap refined or an error corrected. The current guide and registry record own the current wording.

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