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Toxoplasma gondii & Human Phenotype

Compendium of Known Effects and Ongoing Research

durango

Toxoplasma gondii infection in interstate truck drivers: a case-control seroprevalence study

October 9, 2015 14 Comments
Alvarado-Esquivel, C., Pacheco-Vega, S. J., Hernandez-Tinoco, J., Salcedo-Jaquez, M., Sanchez-Anguiano, L. F., Berumen-Segovia, L. O., Rabago-Sanchez, E., Liesenfeld, O.
Parasites & Vectors 2015; 8
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Background: Infection with Toxoplasma gondii can be acquired via the ingestion of undercooked or raw meat containing tissue cysts, or via ingestion of water contaminated with oocysts. Professional long distance truck driving may have epidemiological importance for food-borne infections since drivers eat out of home and in places where hygiene and cooking practices are uncertain. We aimed to determine whether interstate truck drivers in Durango, Mexico have an increased risk of infection with T. gondii as indicated by seropositivity; and to determine the socio-demographic, work, clinical, and behavioral characteristics associated with T. gondii seropositivity in interstate truck drivers. Methods: Through a case-control study design, 192 truck drivers and 192 controls from the general population of the same region matched by gender and age were examined with enzyme-linked immunoassays for the presence of anti-Toxoplasma IgG and IgM antibodies. Socio-demographic, work, clinical and behavioral characteristics from the truck drivers were obtained. Results: Anti-T. gondii IgG antibodies were found in 23 (12.0%) of 192 truck drivers and in 13 (6.8%) of 192 controls (OR = 21.0; 95% CI: 1.23-358.38; P = 0.002). Anti-T. gondii IgM antibodies were found in 7 (3.6%) cases and in 7 (3.6%) controls (P = 1.00). The seroprevalence of T. gondii infection was higher in drivers with reflex impairment than in those without this impairment (4/13, 30.8% vs 19/179, 10.6%, respectively; P = 0.05), and in drivers with hearing impairment than in those without this impairment (3/7, 42.9% vs 20/185, 10.8%, respectively; P = 0.03). Multivariate analysis of work and behavioral characteristics of truck drives showed positive associations of T. gondii exposure with trips to the south of Mexico (OR = 3.11; 95% CI: 1.02-9.44; P = 0.04) and consumption of horse meat (OR = 5.18; 95% CI: 1.62-16.55; P = 0.005). Conclusions: Results suggest that interstate truck drivers may have an increased risk for T. gondii infection, and that T. gondii exposure may be impacting neurological functions in truck drivers. Contributing factors for T. gondii exposure should be taken into account for the design of optimal prevention measures against T. gondii infection.

Tagged: accidents, case-control study, durango, hosts, Mexico, population, risk factors, Schizophrenia, seroepidemiology, seroprevalence, suicide attempts, tissues, Toxoplasma gondii, truck drivers

BehaviorPhysical health

High seroprevalence of Toxoplasma gondii infection in female sex workers: a case-control study

May 25, 2015
Alvarado-Esquivel, C., Sanchez-Anguiano, L. F., Hernandez-Tinoco, J., Arreola-Chaidez, E., Lopez, J., Salcido-Meraz, K. I., Estrada-Martinez, S., Navarrete-Flores, J. A., Perez-Alamos, A. R., Hernandez-Ochoa, M., Rabago-Sanchez, E., Liesenfeld, O.
European Journal of Microbiology and Immunology 2015; 5: 285-292
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Through an age-and sex-matched case-control study, we sought to determine whether female sex workers have an increased risk of Toxoplasma gondii exposure and to determine the sociodemographic, work, clinical, and behavioral characteristics of these workers associated with T. gondii exposure. Female workers (n = 136) and controls (n = 272) were examined with enzyme-linked immunoassays (EIA) for the presence of anti-Toxoplasma IgG and IgM antibodies. IgM positive sera were additionally tested with enzyme linked-fluorescence immunoassay (ELFA). Anti-T. gondii IgG antibodies were found in 21 (15.44%) of 136 cases and in 10 (3.67%) of 272 controls (OR = 4.05; 95% CI: 1.84-8.89; P = 0.0001). Anti-T. gondii IgG levels higher than 150 IU/ml were found in 13 (9.6%) of 136 cases and in 8 (2.9%) of 272 controls (P = 0.007). Anti-T. gondii IgM antibodies were found in two cases and in six controls by EIA, but all were negative by ELFA. T. gondii seropositivity was associated with being born out of Durango State (OR = 10.47; 95% CI: 2.9-36.8; P < 0.01), injuries during sex work (OR = 6.30; 95% CI: 1.1-33.7; P = 0.03), and soil contact (OR = 4.11; 95% CI: 1.2-14.0; P = 0.02). This is the first report of an association of T. gondii infection and female sex workers.

Tagged: case-control study, city, drivers, durango, female sex workers, history, Mexico, risk factors, Schizophrenia, seroepidemiology, seroprevalence, suicide attempts, Toxoplasma gondii, traffic accidents, transmission

BehaviorMental health

Toxoplasma gondii exposure in patients suffering from mental and behavioral disorders due to psychoactive substance use

January 10, 2015
Alvarado-Esquivel, C., Carrillo-Oropeza, D., Pacheco-Vega, S. J., Hernandez-Tinoco, J., Salcedo-Jaquez, M., Sanchez-Anguiano, L. F., Ortiz-Jurado, M. N., Alarcon-Alvarado, Y., Liesenfeld, O., Beristain-Garcia, I.
Bmc Infectious Diseases 2015; 15: Artn 172 10.1186/S12879-015-0912-1
Tagged: Dopamine, durango, Epidemiology, infection, Mexico, northern mexican city, personality, pregnant women, psychiatric patients, psychoactive drug abuse, Schizophrenia, seroepidemiology, seroprevalence, suicidal-behavior, Toxoplasma gondii

BehaviorMental health

Toxoplasma gondii infection and suicide attempts a case-control study in psychiatric outpatients

October 10, 2013 103 Comments
Alvarado-Esquivel, C., Sanchez-Anguiano, L. F., Arnaud-Gil, C. A., Lopez-Longoria, J. C., Molina-Espinoza, L. F., Estrada-Martinez, S. Liesenfeld, O. Hernandez-Tinoco, J. Sifuentes-Alvarez, A. Salas-Martinez, C.
Journal of Nervous and Mental Disease 2013; 201: 948-952.
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The association of Toxoplasma gondii infection with suicide attempts has been scarcely evaluated. Two hundred eighty-three psychiatric outpatients (156 patients with history of suicide attempt and 127 control patients without history of suicide attempt) were examined with enzyme-linked immunoassays for Toxoplasma immunoglobulin G (IgG) and IgM antibodies. Seroprevalences of Toxoplasma IgG and IgM in the cases and the controls were similar: 7 (4.5%) and 3 (1.9%) vs. 10 (7.9%) and 3 (2.4%) (p = 0.23 and p = 0.55), respectively. In contrast, the Toxoplasma IgG levels higher than 150 IU/ml were more frequently observed in the cases than in the controls (100% vs. 50%, respectively; p = 0.04). The seroprevalence of Toxoplasma infection increased with age and with the number of suicide attempts. Toxoplasma seropositivity was associated with reflex impairment, national trips, and snake meat consumption. Our results suggest that although seroprevalence of Toxoplasma infection is not associated with suicide attempts, a high anti-Toxoplasma antibody level is, therefore warranting further research.

Tagged: antibody-titers, case-control study, durango, Epidemiology, history, northern mexican city, parasites, population, rates, Schizophrenia, seroepidemiology, seroprevalence, suicide attempts, Toxoplasma gondii

BehaviorMental health

Toxoplasma gondii infection and schizophrenia: A case control study in a low Toxoplasma seroprevalence Mexican population

October 19, 2011
Alvarado-Esquivel, C., Urbina-Alvarez, J. D., Estrada-Martinez, S., Torres-Castorena, A., Molotla-de-Leon, G., Liesenfeld, O., Dubey, J. P.
Parasitology International 2011; 60: 151-155
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There are conflicting reports concerning the association of Toxoplasma gondii infection and schizophrenia in humans. Therefore, we determined such association in a Mexican population of Mestizo ethnicity. Through a case-control study design, 50 schizophrenic patients and 150 control subjects matched by gender, age, residence place, and ethnicity were examined with enzyme-linked immunoassays for the presence and levels of T. gondii IgG antibodies and for the presence of T. gondii IgM antibodies. Schizophrenic patients attended a public psychiatric hospital in Durango City, Mexico, and the control group consisted of individuals of the general population of the same city. Socio-demographic, clinical and behavioral characteristics from the study subjects were also obtained. Both the seroprevalence and the level of T. gondii IgG antibodies were higher in schizophrenic patients (10/50; 20%) than in control subjects (8/150; 5.3%) (OR=4.44; 95% CI: 1.49-13.37; P=0.003). The IgG T. gondii levels higher than 150 IU/ml were more frequently observed in patients than in controls (10% versus 2%, respectively; P=0.02). One (50%) of the two patients with recently diagnosed schizophrenia and none of the controls had T. gondii IgM antibodies (P=0.01). T. gondii seropositivity was significantly higher in patients with a history of cleaning cat excrement (P=0.005), and suffering from simple schizophrenia (ICD-10 classification: F20.6) (P=0.03) than patients without these characteristics. Toxoplasma seroprevalence was also significantly higher in patients with simple schizophrenia (F20.6) than in those with paranoid schizophrenia (F20.0) (P=0.02). This study provides elements to clarify the controversial information on the association of T. gondii infection and schizophrenia. Published by Elsevier Ireland Ltd.

Tagged: antibodies, case-control study, durango, Epidemiology, individuals, Schizophrenia, seroepidemiology, seroprevalence, Toxoplasma gondii

Mental health

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