The Odd Ratio for schizophrenia for indivduals with IgG antibodies for toxoplasma gondii were 1.81, With toxoplasma gondii infection.there is increased activity of iron-responsive protein 1 (IRP1). Aconitase 1 is a dual function protein, When iron levels are low aconitase 1 loses an iron sulfur cluster and becomes IRP1 but when iron levels are increased IRP1 gains an iron-sulfur cluster and becomes aconitase 1. Aconitase 1 is an enzyme in the tricarboxylic acid (TCA) cycle. Increased levels of IRP1 would indicate that the TCA cycle is dysregulated which could set the set the stage for schizophrenia. See my paper Treatment-resistant schizophrenia: focus on the transsulfuration pathway. on how dysregulation of IRP1, aconitase 1 and the TCA cyle could play a part in the development of schizophrenia.