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bradyzoite

Cryptogenic epilepsy: an infectious etiology?

November 7, 2001
Stommel, E. W., Seguin, R., Thadani, V. M., Schwartzman, J. D., Gilbert, K., Ryan, K. A., Tosteson, T. D., Kasper, L. H.
Epilepsia 2001; 42: 436-438
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Purpose: Cryptogenic epilepsy, the group of epilepsy syndromes for which an etiology is unknown, comprises similar to 20% of all epilepsy syndromes. We selected patients in this subgroup of epilepsy and tested them for evidence of Toxoplasma gondii IgG antibodies by the enzyme-linked immunosorbent assay. T. gondii is found in up to 20% of the U.S. population forming dormant brain cysts in the latent bradyzoite form. We investigated the hypothesis that dormant T. gondii infection might be associated with cryptogenic epilepsy. Methods: We selected patients with cryptogenic epilepsies and tested them for evidence of T. gondii IgG antibodies by the enzyme-linked immunosorbent assay. A control group was also tested for comparison. Results: We have found a statistically-significant elevation of T. gondii antibodies among cryptogenic epilepsy patients as compared to controls [59% increase in optical density (OD), p = 0.013]. This association persisted after adjustment for subjects' gender and age in a multiple logistic regression model; however, it was no longer as statistically significant. Conclusions: Our results suggest that chronic T. gondii infection with brain cysts may be a cause of cryptogenic epilepsy.

Tagged: bradyzoite, cryptogenic epilepsy, encephalitis, Epidemiology, host-parasite relationship, minnesota, parasitic infections, population, rochester, seizures, Toxoplasma gondii

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