The National Institutes of Health (US) has some information on this at https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3796088/ and
https://www.ncbi.nlm.nih.gov/pubmed/22225599
Also the Psychiatric Times at http://www.psychiatrictimes.com/schizophrenia/potential-rational-adjunctive-anti-inflammatory-therapy-schizophrenia-quenching-fire
Part of this problems are because nonetiological symptomatic treatment of rheumatic diseases (NSAID, aspirin, corticosteroids ....), without diagnostic of primary focal or systemic infections! and targeted therapy!