Clear IACUC policies required

As the entity tasked with safeguarding animal welfare within the research setting, it is well within the IACUC’s purview to ensure that all practices do not cause a threat to animal health. The inspectors should be commended for identifying this potential concern during the semi-annual inspection. However, rather than simply referring to a policy written by the Department of Animal Resources (DAR), the committee should be looking at what the IACUC policies are instead, as they require compliance from all animal users. The policy of the DAR does not extend beyond the DAR, unless other departments or laboratories choose to adopt it, or the IACUC mandates that all users have to follow it. Following Dr. Reinhold’s comments, it will be good for the IACUC to take the opportunity to review/ consider the following:

  1. (1)

    Is it necessary to re-sterilise unopened and uncontaminated surgical packs?

  2. (2)

    Is there scientific literature to support this?

  3. (3)

    Does the IACUC expect all animal users to adhere to one specific standard, i.e. is a policy required?

The CDC guidelines are based on multiple citations indicating that shelf life should be event-related, meaning that as long as the packaging of the sterile items is not compromised, re-sterilisation is not required. Other publications support the validity of this practice, for up to 96 weeks1,2. Granted there are many factors that have to be considered in determining whether or not an item is compromised, e.g. material used for packaging, methods of packaging, how it has been handled, storage conditions (humidity, ventilation, presence of dust and/or vermin). Assuming that all these have been addressed, there seems to be little scientific evidence that unopened, uncontaminated surgical packs need an expiry date.

As such, the IACUC will first need to decide if re-sterilisation is necessary past a given time period, and/or under what circumstances. It may be beneficial to find out the reason why the DAR policy states that re-sterilisation is required every six months. Thereafter, an IACUC policy should be drafted and approved by the committee. The rationale for requiring re-sterilisation (or not) should be also conveyed. Once that is in effect, Dr. Reinhold will need to submit for an exemption and justify his position, if it is not in line with the IACUC policy. Apart from requesting scientific literature, one can also suggest that the sterility of the surgical packs be validated. Having records showing no surgical infections may not be sufficient, since subclinical infections may go undetected but still have significant impact on research outcomes, leading to poor science and a waste of animals. If Dr. Reinhold is able to demonstrate that his lab practices are able to keep surgical packs sterile, the IACUC can consider accepting this and grant Dr. Reinhold an exemption to the IACUC policy, if the IACUC decides on a fixed shelf life. However, this should be reviewed periodically to ensure that the lab practices remain the same.

Ultimately, the policies and recommendations that the IACUC provides should be based on scientific data and performance assessment. Periodic review of available literature and updating practices to current industry standards is important; the IACUC and DAR should routinely review their policies and standard operating procedures. As it stands, if Dr. Reinhold’s surgical packs are indeed not open, and the IACUC is satisfied that the packs are not compromised, the IACUC may wish to reconsider enforcing the 6-month re-sterilisation requirement for Dr. Reinhold.


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Correspondence to Jassia Pang.

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Pang, J., Loh, M., Tay, Y.Q. et al. Clear IACUC policies required. Lab Anim 47, 297 (2018).

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