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The serum Trypsin-Like Immunoreactivity (TLI) test is performed by a laboratory on a blood sample taken by your vet. A TLI level of 2.6 (micrograms per litre) or lower is indicative of TLI. Cheetahs TLI level is 0.5 (very very low). The TLI level range for a healthy dog is 5.0 – 100 micrograms per litre.
