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Toxoplasma gondii & Human Phenotype

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Seropositivity of Toxoplasma gondii and Toxocara spp. in children with cryptogenic epilepsy, Benha, Egypt

October 6, 2016 14 Comments
Eraky, M.A., Abdel-Hady, S., Abdallah, K.F.
Korean Journal of Parasitology 2016; 54: 335-338.
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The present study aimed to investigate the possible association of Toxoplasma gondii and Toxocara spp. infections with cryptogenic epilepsy in children. The study was carried out between June 2014 and March 2015. Total 90 children (40 with cryptogenic epilepsy, 30 with non-cryptogenic epilepsy, and 20 healthy control children) were evaluated to determine the anti-Toxocara and anti-T. gondii IgG seropositivity using ELISA kits. Epileptic cases were selected from those attending the pediatrics outpatient clinic of Benha University Hospital, Pediatrics Neurology Unit, and from Benha Specialized Hospital of children. The results showed that the level of anti-T. gondii IgG seropositivity was significantly higher among children with cryptogenic epilepsy (20%) than among children with non-cryptogenic children (0%). In healthy controls (10%), there was no association between toxocariasis seropositivity and cryptogenic epilepsy (only 5.7%; 4 out of 70 cases) among cases and 10% (2 out of 20) among controls. Among toxocariasis IgG positive cases, 3 (7.5%) were cryptogenic, and only 1 (3.3%) was non-cryptogenic. These statistically significant results support the association between T. gondii infection and cryptogenic epilepsy while deny this association with toxocariasis.

Tagged: child, cryptogenic epilepsy, egypt, Epidemiology, ilae, infection, prevalence, seropositivity, toxocara, Toxoplasma

Mental healthPhysical health

Hepatitis C virus antibody titers associated with cognitive dysfunction in an asymptomatic community-based sample

May 29, 2016
Ibrahim, I., Salah, H., El Sayed, H., Mansour, H., Eissa, A., Wood, J., Fathi, W., Tobar, S., Gur, R. C., Gur, R. E., Dickerson, F., Yolken, R. H., El Bahaey, W., Nimgaonkar, V.
Journal of Clinical and Experimental Neuropsychology 2016; 38: 861-868
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Background: Hepatitis C virus (HCV) infection is associated with cognitive dysfunction in clinic-based studies. The risk could be attributed to factors such as antiviral medications, substance abuse, or coincidental infection. Aim: The aim was to evaluate cognitive function in relation to HCV antibody titers in a community-based sample of asymptomatic individuals at low risk for substance abuse. Method: Adults were ascertained from a community in Mansoura, Egypt, where HCV is endemic (n = 258). Cognitive performance was evaluated using the Arabic version of the Penn Computerized Neurocognitive Battery. Substance abuse and psychopathology were also assessed. Antibodies to HCV and Toxoplasma gondii (TOX), a common protozoan that can affect cognition, were estimated using serological IgG assays. Results: The prevalence of HCV and TOX infection was 17.6% and 52.9%, respectively. HCV antibody titers were significantly associated with worse function in four cognitive tests for accuracy and three tests for speed, after adjusting for covariates (p <.05, beta coefficients, 2.1-3.2). TOX antibody titers were associated with impaired accuracy in one test. Conclusions: The association between HCV antibody titers and cognitive impairment is not mediated by antiviral treatment or substance abuse in this sample. Whether HCV has a causal role in the cognitive dysfunction should be investigated.

Tagged: cognition, computerized neurocognitive battery, egypt, Epidemiology, hepatitis c virus, impairment, liver-disease, prevalence, psychiatric-disorders, quality of life, risk factors, Toxoplasma, toxoplasma gondii infection, united-states

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