Every change to what this site lists, newest first: held lines added and no longer held, species renamed, families changed and bioactivity recorded or no longer recorded. Each release is dated by the day the site's data changed, the date the downloads carry; a change to a media recipe is dated by the day the lab's workbook held it.
The site's records were brought in line with the lab's database: 1,635 activities recorded, 105 activities no longer recorded. No held line or species was added or removed.
Where the changelog starts
Species: 2,041 · Held lines: 2,120
The site began listing the collection from the lab's records. Each change after this date is recorded here when a refresh of the data is reviewed; earlier changes come from the historic records UMass provided, below.
Before Tufts: from UMass Amherst's records
Until early 2026 the collection was held at UMass Amherst, and custody passed to Tufts then. The entries below come from the historic records UMass provided, not from Tufts' own: dated database files, and a formulation workbook for the media recipes. Each entry compares a version of the database with the one before it, or dates the recipes by the workbook. Each is dated only as precisely as its file allows, and its line counts are of every line in those records, held or not.
From UMass's records
From the 23 July 2025 (trimmed) version to the master (dated 2 July 2025, saved February 2026).
Lines in the lab's records: 2,308 → 2,307
Lines no longer held (1)
1 line the site has no page for
AB-12419 C1 Aristolochia labiata
From UMass's records
From the 2 July 2025 (before the reorganization) version to the 23 July 2025 (trimmed) version.
From the 26 July 2019 version to the 9 August 2019 version.
No change to the collection.
Lines in the lab's records: 2,383
From UMass's records
From the July 2015 version to the 26 July 2019 version.
Lines in the lab's records: 4,432 → 2,383
Read with care. A status survey kept inside the 2020 archive (and again in the 2021 ones). Its Culture IDs include sub-cultures (suffixes such as -F1) that later versions drop, and its species names are older, so its comparison with 2019 overstates what changed.
Its 287 lines added and 2,324 lines no longer held are counted, not listed.