ULAM, ACUO Announce Winter 2023 Holiday Hours

November 27, 2023

Snow covered pine tree branchSeveral service areas within the Animal Care & Use Program, including the Animal Care & Use Office (ACUO) and the Unit for Laboratory Animal Medicine (ULAM), will be closed or operating at limited capacity during the upcoming holiday season.

Below is a list of operating schedules and plans for areas that may have a direct impact on researchers.

To ensure that your research needs are met quickly and efficiently, please review and share these schedules with your team, plan ahead, and act early.



Animal Care & Use Office

The Animal Care & Use Office (ACUO) will be closed beginning at 12:00 PM (noon) on Friday, December 22, 2023 – Monday, January 1, 2024.

Submissions to the IACUC will still be accepted through eRAM during this time period, but the ACUO will be unable to process them until the office re-opens on Tuesday, January 2, 2024.

Animal Ordering and Deliveries

Final animal deliveries will be received on Thursday, December 21, 2023. There will be no animal deliveries beginning Friday, December 22, 2023 – Monday, January 1, 2024.

You must order animals by Friday, December 8, 2023, to arrive the week of December 18, 2023.

You must order animals by Thursday, December 14, 2023, for animals to arrive during the week of Tuesday, January 2, 2024 – Friday, January 5, 2024.

Animal Surgery
Operating Rooms (ASOR)

The Animal Surgery Operating Rooms (ASOR) will be closed Monday, December 25, 2023 – Monday, January 1, 2024.

Questions about ASOR scheduling or services should be directed to ulam-asor@umich.edu or (734) 764-0224.

In-Vivo Animal Core (IVAC)

Both In-Vivo Animal Core (IVAC) locations at NCRC and MSAB will be closed beginning at 12:00 PM (noon) on Friday, December 22, 2023 – Monday, January 1, 2024.

Sample submission deadlines BEFORE the holidays are as follows:

  • Monday, December 18 – for histology
  • Wednesday, December 20 – for hematology/chemistry/send-outs

These deadlines were chosen to allow IVAC staff sufficient time before the holiday break to process samples to a stable stage. CBCs must be completed within 24 hours of receipt, and paraffin histology samples are stable once they reach the embedding stage.

Samples that do not need processing prior to the holidays (frozen serum, glass slides, paraffin blocks) can be submitted by appointment up until the closing date; no work will be done during the time periods that IVAC is closed.

As a reminder, sample submission is by appointment only. Study teams are strongly encouraged to book their appointments early, particularly if they anticipate a large submission, in order to help IVAC staff plan their workflows accordingly.

Both IVAC locations will re-open on Tuesday, January 2, 2024, at 9:00 AM.

ULAM Technical Services
ULAM Technical Services are currently unavailable during weekends and holidays, and have limited availability from Tuesday, December 26, 2023 – Friday, December 29, 2023. All requests should be submitted via the Technical Services Request Form
ULAM Training Core
The ULAM Training Core will be closed Friday, December 22, 2023 – Monday, January 1, 2024, unless prior arrangements have been made with Kiirsa Pokryfke, Manager Training Core and Technical Services.
ULAM Business Office

The ULAM Business Office will be closed beginning at 3:00 PM on Friday, December 22, 2023 – Monday, January 1, 2024.

The office will re-open at 9:00 AM on Tuesday, January 2, 2024.



  • Please contact the Animal Care & Use Office at acuoffice@umich.edu or (734) 763-8028 if you have any questions or concerns.

  • If you have questions about a particular ULAM service area not listed above, contact the ULAM Business Office at ulam-questions@umich.edu or (734) 764-0277 (leave a voicemail and your call will be returned).