Detection of Toxoplasma gondii and Epstein-Barr virus in HIV patients with clinical symptoms of suspected central nervous system infection using duplex real-time polymerase chain reaction

1st Physics and Technologies in Medicine and Dentistry Symposium

物理学;医药卫生

Rahmawati, E.^1 ; Ibrahim, F.^1 ; Imran, D.^2 ; Sudarmono, P.^1

Department of Microbiology, Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia^1

Department of Neurology, Faculty of Medicine, Universitas Indonesia, Jakarta, Indonesia^2

关键词: Annealing temperatures;    Central nervous systems;    Magnetic Resonance Imaging (MRI);    Mycobacterium tuberculosis;    Pseudomonas aeruginosa;    Real time polymerase chain reactions;    Staphylococcus aureus;    Varicella zoster virus;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/884/1/012149/pdf
DOI  :  10.1088/1742-6596/884/1/012149

学科分类：卫生学

来源: IOP

【 摘 要 】

Focal brain lesion is a neurological complication in HIV, which is marked as a space occupying lesion (SOL) and needs rapid and effective treatment. This lesion is mainly caused by encephalitis toxoplasma and primary central nervous system lymphoma related to the Epstein-Barr virus (EBV) infection, which is difficult to distinguish using CT scan or magnetic resonance imaging (MRI). The gold standard of diagnosing focal brain lesion has been brain biopsy, but this examination is an invasive procedure that causes complications. The objective of this study is to obtain the rapid laboratory diagnosis of Toxoplasma gondii (T. gondii) and EBV infection. In this experimental study, blood and cerebrospinal fluid were obtained from HIV patients who were admitted to the Neurology Department of Cipto Mangunkusumo Hospital. The samples were examined using duplex real-time polymerase chain reaction (PCR) to detect T. gondii and EBV. The first step was the optimization of duplex real-time PCR, including the annealing temperature, primer and probe concentration, elution volume, and template volume. Minimal DNA detection was used to measure minimal T. gondii and EBV. Cross reactions were determined for technical specificity using the bacteria and viruses Staphylococcus aureus, Klebsiella pneumonia, Pseudomonas aeruginosa, Mycobacterium tuberculosis H37Rv, Candida spp, cytomegalovirus, herpes zoster virus, and varicella zoster virus. Duplex real-time PCR was applied optimally to patients. In the optimization of duplex real-time PCR, the annealing temperature of T. gondii and EBV were 58 °C, the concentration of primer forward and reverse for T. gondii and EBV were 0.2 μM, the concentration of probe for T. gondii and EBV were 0.4μM and 0.2 μM, respectively. Minimal DNA detection of T. gondii and EBV were 5.68 copy/ml and 1.31 copy/ml, respectively. There was no cross reaction between another bacteria and virus that were used as the primer and probe for T. gondii and EBV. The blood duplex real-time PCR was positive for T. gondii (16%), EBV (40%), and both (16%). The cerebrospinal fluid samples were positive for T. gondii (20%), EBV (28%), and both (4%).