GPT and infectious meningitis: In the case of muscle damage biomarkers, all of them showed higher levels in pigs with meningitis compared with healthy pigs: CK (1.3-fold), CK-MB (1.9-fold), troponin I (1.8-fold), lactate (3.27-fold), LDH (5.4-fold), AST (2.5-fold), and ALT (2.4-fold).