NPY and infection: NPY was exclusively identified in non-infected CNS, while NKY supported by three MS peptides (GDKDDLYSAILQAAESPS, TYATTDATLETILNVLKSHAQSLRQLESTVYEQ and TYATTDATLETILNVLKSHAQSLRQLESTVYEQa) was only detected at pre-patent infection stage.