Кое-что в тему
http://www.experts.scival.com/jhu/pubDetail.asp?t=pm&id=17207471&n=Robert+Yolken&u_id=3567
CONCLUSIONS: In some individuals infection with Toxoplasma gondii may be an environmental factor contributing to the manifestation of positive psychotic symptoms.
http://www.sciencedaily.com/releases/2009/03/090311085151.htm
The parasite infects the brain by forming a cyst within its cells and produces an enzyme called tyrosine hydroxylase, which is needed to make dopamine. Dopamine’s role in mood, sociability, attention, motivation and sleep patterns are well documented and schizophrenia has long been associated with dopamine, which is the target of all schizophrenia drugs on the market.
http://www.stanleyresearch.org/dnn/LaboratoryofDevelopmentalNeurovirology/ToxoplasmosisSchizophreniaResearch/tabid/172/Default.aspx
Наиболее полный обзор всей гипотезы с токсоплазмой. Смотрится довольно убедительно, однако в эру доказательной медицины наибольшим весом обладают РКИ. А РКИ, к сожалению, пока безрезультатны.
Trials of drugs known to be effective against T. gondii on patients with schizophrenia
· azithromycin (Zithromax) 600 mg: 56 outpatients with schizophrenia; double-blind, placebo trial; 16 weeks; add-on to regular antipsychotic; negative study (Dickerson FB, Stallings CR, Boronow JJ et al., A double-blind trial of adjunctive arithromycin in individuals with schizophrenia who are seropositive for Toxoplasma gondii, Schizophr Bull 2007;112:198–199).
· trimethoprim 200 mg: 91 male outpatients with mostly chronic schizophrenia; double-blind, placebo trial; 6 months; add-on to chlorpromazine or haloperidol. Both groups improved markedly, perhaps reflecting being on a regular antipsychotic with monitoring and follow-up. The trimethoprim group improved more on the negative symptom subscale, but the difference did not achieve statistical significance (Shibre T, Alem A, Abdulahi A et al., Trimethoprim as adjuvant treatment in schizophrenia: a double-blind, randomized, placebo-controlled clinical trial, Schizophr Bull 2010;36:846–851).
С другой стороны, использовались препараты, эффективные для лечения острого токсоплазмоза, однако, они не воздействуют на цисты токсоплазмы. Чтобы окончательно развенчать(или подтвердить) гипотезу следовало бы провести РКИ с клиндамицином, атоваквоном или артемером, препаратами, способными поражать и сами цисты паразитов.