To test for FeLk, FIV & FIP there is a snap test called the ELISa (Enzyme Linked Immunosorbant assay) test this will test for all three & can be done in-clinic.
I was also wondering about nerve damage. A neurological exam by a specialist will define which part of the nerve system has been affected.
Avoid biting when a simple growl will do
The Spirit Lives As Long As Someone Who Lives Remembers You - Navaho Saying
Vindication ~ For all those pets who became sick or lost their lives from tainted pet food