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Toxoplasma gondii & Human Phenotype

Compendium of Known Effects and Ongoing Research

suicide attempt

Toxoplasmosis Titers and past Suicide Attempts Among Older Adolescents Initiating SSRI Treatment

March 23, 2016
Coryell, W., Yolken, R., Butcher, B., Burns, T., Dindo, L., Schlechte, J., Calarge, C.
Archives of Suicide Research 2016; 20: 605-613
Click for abstract
Latent infection with toxoplasmosis is a prevalent condition that has been linked in animal studies to high-risk behaviors, and in humans, to suicide and suicide attempts. This analysis investigated a relationship between suicide attempt history and toxoplasmosis titers in a group of older adolescents who had recently begun treatment with an SSRI. Of 108 participants, 17 (15.7%) had a lifetime history of at least one suicide attempt. All were given structured and unstructured diagnostic interviews and provided blood samples. Two individuals (11.9%) with a past suicide attempt, and two (2.1%) without this history, had toxoplasmosis titers >= 10 IU/ml (p = 0.166). Those with a past suicide attempt had mean toxoplasmosis titers that were significantly different (p = 0.018) from those of patients who lacked this history. An ROC analysis suggested a lower optimal threshold for distinguishing patients with and without suicide attempts (3.6 IU/ml) than that customarily used to identify seropositivity. Toxoplasmosis titers may quantify a proneness to suicidal behavior in younger individuals being treated with antidepressants.

Tagged: aggression, behavior, children, gondii antibody-titers, history, impulsivity, latent infection, mood disorder, risk, suicide attempt, toxoplasmosis, traffic accidents

Mental health

May Toxoplasma gondii increase suicide attempt – preliminary results in Turkish subjects?

October 19, 2010
Yagmur, F., Yazar, S., Temel, H. O., Cavusoglu, M.
Forensic Science International 2010; 199: 15-17
Click for abstract
Suicide attempts are one of the risk factors of suicide. Possible mechanisms by which Toxoplasma gondii may affect human behavior and it may also cause humans to attempt suicide. The aim of this study is to find out whether or not T. gondii is one of the reasons in suicide attempts. We investigated the seropositivity level for anti-Toxoplasma IgG and IgM antibodies by enzyme-linked immunosorbent assay in subjects who have attempted to suicide to find out whether there is a probable relationship between T. gondii and suicide attempts. In our study, we selected 200 cases of suicide attempts and 200 healthy volunteers. The sero-positivity level for anti-Toxoplasma IgG antibodies among suicide attempts (41%) was significantly higher than the control group (28%). This signifies that there might be a causal relationship between toxoplasmosis and the etiology of suicide attempt. (c) 2010 Elsevier Ireland Ltd. All rights reserved.

Tagged: acquired toxoplasmosis, cryptogenic epilepsy, elisa, encephalits, host, human-behavior, impact, neurons, parasites, rats, rattus-norvegicus, suicide attempt, Toxoplasma gondii

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Recent articles

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