What is a recommended method for refrigerating a head sent for rabies testing?

The recommended method for refrigerating a head sent for rabies testing is using gel packs or similar materials. This method is preferred because gel packs can maintain a stable, cold temperature without the risk of freezing the specimen. Maintaining the appropriate temperature is crucial for preserving the integrity of the sample until it can be analyzed, as freezing can alter the biological composition and hinder accurate testing results.

Using gel packs also minimizes the risk of excess moisture that can come from ice cubes, which can dilute or compromise the sample. Whereas dry ice is too cold and can damage the tissue or cellular components necessary for rabies testing. Warm water would be entirely inappropriate, as it would create conditions that facilitate decomposition and further risk the viability of the sample. Therefore, gel packs emerge as the most effective method for ensuring that the head remains chilled adequately during transportation to the testing facility.