IL6 and meningitis: The increases seen in Hp and LDH indicate the presence of inflammation and tissue damage in pigs with PRRSV and pigs with meningitis that could be a consequence of the “cytokine storm” produced in these diseases [33], involving various cytokines, such as IL-6, IL8, and TGF-B [34,35], being this “storm” in the case of meningitis of a higher magnitude.