Summary
This study evaluated identification-microchip implantation without anesthesia in 66 C57BL/6 mouse pups at postnatal days 12, 14, 16, or 21. Microchipped, sham-injected, and untreated pups followed similar growth patterns through day 56, with no injection-site abnormalities or treatment-related deaths, suggesting implantation was well tolerated as early as day 12 under the tested conditions. Small UID RFID microchips and a handheld reader provided permanent electronic identification.
Summary written by UID from the published work. Read the original publication for the authors' abstract and full methods.