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Pathological Waste

The University Laboratory Animal Resources (ULAR) office provides removal, transportation and disposal services for University units that generate pathological waste. According to the MMWRA, pathological waste consists of human organs, tissues, body parts other than teeth, products of conception, and fluids removed by trauma or during surgery or autopsy or other medical procedure, and not fixed in formaldehyde. At MSU, animal carcasses are also considered pathological waste. Although not all pathological waste is infectious, it is prudent to handle such waste as if it were because of the possibility of unknown infection in the source.     

Human pathological waste is also covered by “Universal Precautions” according to the MIOSHA Bloodborne Pathogen Standard. For more information on this subject, refer to MSU’s Exposure Control Plan. Copies are available at the ORCBS (355-0153). Typically, carcasses or tissues are collected in plastic bags, labeled, stored in area freezers, cold rooms or refrigerators and removed for incineration by ULAR. Many units have routine weekly ULAR pickups. For non scheduled pickup,  call ULAR at 353-5064, or fax a completed “ULAR Pathological Waste Pick-up Request Form” (Appendix F) 4 to 5 working days before the desired pick-up date to ULAR (Fax: 432-2766).

Animal Waste (ULAR Specific Procedures)

1. Non-Infectious Material

• Rodents and Small Amounts of Waste
  Use opaque bags or wrap items in a paper towel if using clear plastic bags. 2 mil plastic bags or sealable kitchen bags are acceptable for small numbers of animals. Use an opaque 4 mil bag for large numbers.
• Rabbits and Larger Animals
  Use 4 mil black plastic bags. If over 50 lbs - double bag. For ease of handling, do not load the bags with more than 30 lbs, if multiple animals are involved.

2. Infectious Material (Biohazardous Agents)
1. For waste generated from projects involving experimental infections, follow the instructions on the Animal Hazard Control Form which is posted on the animal room door.
2. For other infectious animal waste, place in a sealed, leakproof container and then put biohazard labeling on it. Do not use a biohazard bag as a primary container, as it might ot be strong enough. For large amounts, use the supplied fiber drums.
   
   
3. Chemically Contaminated Animals or Tissue
1. Follow instructions on the Animal Hazard Control Form posted on the room door.
2. Follow instructions from the ORCBS regarding disposal of animals which have been treated with hazardous chemicals in a laboratory in terminal experiments.
   
   
4. General Instructions
   If the waste tag is not filled out properly and attached to the bag, the waste will not be picked up. There MUST be a box checked in the left hand lower section of the waste tag. All containers must be sealed. Leaky or improperly labelled containers will not be picked up.

Department or Facility Specific Procedures

Waste Disposal Guide Table of Contents