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Updated: Apr 23, 2026

3-D Imaging and Analysis of Neurons Infected In Vivo with Toxoplasma gondii
Published on: December 9, 2014
Recurrent headaches may be caused by cerebral toxoplasmosis
Joseph Prandota1, Anna Gryglas1, Aleksander Fuglewicz1
1Joseph Prandota, Anna Gryglas, Aleksander Fuglewicz, Agata Żesławska-Faleńczyk, Department of Social Pediatrics, Faculty of Health Sciences, Wroclaw Medical University, 51618 Wroclaw, Poland.
Insights
Toxoplasma gondii (TG) infection may be linked to recurrent headaches in children. Over 10% of children studied showed high IgG antibodies, suggesting chronic TG infection as a potential cause for their headaches.
Area of Science:
- Pediatric Neurology
- Infectious Diseases
- Immunology
Background:
- Recurrent headaches are a common complaint in children.
- Toxoplasma gondii (TG) infection is a widespread parasitic disease with potential neurological manifestations.
- The association between TG infection and recurrent headaches in pediatric populations requires further investigation.
Purpose of the Study:
- To determine the seroprevalence of Toxoplasma gondii (TG) infection in children experiencing recurrent headaches.
- To characterize the clinical and epidemiological features of TG infection in this pediatric cohort.
Main Methods:
- A cohort of 178 children (aged 7-17 years) with recurrent headaches was enrolled.
- Serum samples were analyzed for anti-TG IgM and IgG antibodies, and IgG avidity using enzyme immunoassay.
- Clinical data, including headache characteristics and comorbidities, were collected via questionnaires.
Main Results:
- 10.67% of children exhibited high serum anti-TG IgG antibody levels with high avidity index, indicating chronic TG infection.
- Seropositive children reported headaches primarily in frontal, occipital, and parietal areas, with pulsating or squeezing characteristics.
- Comorbidities in seropositive children included epilepsy, various infections, and attention deficits; EEG and neuroimaging had limited diagnostic value for cerebral toxoplasmosis.
Conclusions:
- Chronic Toxoplasma gondii infection is present in a significant subset of children with recurrent headaches.
- Routine screening for TG infection is recommended for pediatric patients presenting with recurrent headaches to aid diagnosis.
Aim:
To establish seroprevalence and provide characteristics of Toxoplasma gondii (TG) infection in children with recurrent headaches.
Methods:
The study was performed in 178 children aged 7-17 years admitted consecutively to the Department of Pediatric Neurology from November 2009 to July 2011. The children were surveyed with a questionnaire with the help and assistance of their parents and blood samples taken on admission were studied for the presence of specific anti-TG IgM, IgG antibodies and IgG avidity using enzyme immunoassay Platelia Toxo IgM, IgG.
Results:
The study showed that 19 children (8 boys, 11 girls; 8-17 years old, mean age 14.36 years) had high serum anti-TG IgG antibody levels (range: 32.2 > 240 UI/mL, mean 120.18 UI/mL; positive value for IgG was ≥ 9 UI/mL). The avidity index (AI) ranged from 0.202 to 0.925 (scale: ≥ 0.5 high AI). The results for IgM antibodies were all negative and the obtained results ranged from 0.113 to 0.25 U/mL (mean = 0.191 IU/mL) and all values below 0.8 IU/mL were considered negative. The most frequent complaints found in the seropositive patients were headaches that affected the frontal (13 children), occipital (4) and parietal areas (5). Headaches usually had a pulsating (in 7 patients) and squeezing (6) character and rarely were piercing, dull or expanding. Interestingly, 8 children did not feel discomfort during the headaches, probably because they did not have sufficiently increased intracranial pressure yet. The headaches usually appeared 1-2 times/mo, lasted for 2-6 h, and had a mean intensity of 5.5 points in a 10 point subjective scale. The comorbidities included epilepsy (5 patients), various infections in 3 children (chronic eustachitis, chronic rhinitis, chronic purulent tonsillitis, streptococcal pharyngitis, meningitis, allergic diseases), disturbances of behavior, deficits of attention, and ocular and motor concentration disorders in 1 child. The electroencephalographic and neuroimaging studies performed in our patients had a very limited value in establishing cerebral toxoplasmosis.
Conclusion:
Ten point six seven percent of the studied children had markedly increased serum anti-TG IgG antibodies and high AI indicated chronic infestation. It is suggested that tests for TG infection should be introduced to routine diagnostics in patients with recurrent headaches.
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