Abstract
Cerebral toxoplasmosis is one of the neurological infections with high morbidity and mortality in patients with AIDS, so the accurate method for diagnosis of cerebral toxoplasmosis seems necessary. In this study, nested PCR assay using B1 gene was evaluated in diagnosis of toxoplasmosis in serum and peripheral blood mononuclear cell (PBMC) among HIV/AIDS patients. One hundred eight blood samples from HIV/AIDS patients, including four patients with cerebral toxoplasmosis and 104 HIV/AIDS patients without cerebral toxoplasmosis were evaluated for the Toxoplasma gondii antibodies using Enzyme Linked immunosorbent Assay. DNA of serum and PBMC of these patients were extracted and nested-PCR was carried out. Of 108 participants, 95 cases (88%) were positive for Toxoplasma IgG antibodies and one patient was found positive for Toxoplasma IgM antibody. In general, four patients, including three patients with cerebral toxoplasmosis, who were positive for Toxoplasma IgG antibodies and one patient without cerebral toxoplasmosis who was positive for Toxoplasma IgM antibody were found to be PCR positive. DNA of T. gondii was detected in both serum and PBMC in two cerebral toxoplasmosis patients; however DNA was detected in only PBMC in other cerebral toxoplasmosis patient. All cases with cerebral toxoplasmosis were also diagnosed by clinical and radiological manifestations. The results of this study showed that the numbers of positive samples by PCR in PBMC were higher than serum specimens for diagnosis of toxoplasmosis. If molecular method and immunological assay are complemented with magnetic resonance imaging, the results can be useful for diagnosis of cerebral toxoplasmosis.
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Acknowledgements
The authors would like to thank from staffs of Infectious Diseases ward, Rasoul-e-Akram Hospital, Iran University of Medical Sciences for their helpful cooperation.
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This study was funded by Research Center of Pediatric Infectious Diseases, Iran University of Medical Sciences in Tehran, Iran with Grant Number (95-02-131-28979)
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KK and FBS proposed the study. KK, AE and SK designed the study. TD, SG and QA help in technical works and Borna Salami helps in sample collection. KK and FBS and SS revised the manuscript. All the authors approved the final manuscript
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Ethical approval for the study and informed consent forms were approved by ethics committee of Iran University of Medical Sciences (Code Number: IR.IUMS.REC 1395.95-02-131-28979). Ethical approval for this study was obtained from IUMS’s Ethics Committee, and written informed consent was taken from all patients or Legally Authorized Representative. All patients or relatives informed the study procedures and agreed to participate in this study.
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Bokharaei-Salim, F., Esteghamati, A., Khanaliha, K. et al. Evaluation of a PCR assay for diagnosis of toxoplasmosis in serum and peripheral blood mononuclear cell among HIV/AIDS patients. J Parasit Dis 44, 159–165 (2020). https://doi.org/10.1007/s12639-019-01176-6
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DOI: https://doi.org/10.1007/s12639-019-01176-6