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Year : 2017  |  Volume : 35  |  Issue : 4  |  Page : 529-534

Aetiological study of viruses causing acute encephalitis syndrome in North West India

1 Department of Microbiology and Immunology, Advanced Basic Sciences and Clinical Research Laboratory, ICMR Grade 1/ DHR State, Sawai Man Singh Medical College, Jaipur, Rajasthan, India
2 Department of Medicine, Sawai Man Singh Hospital, Jaipur, Rajasthan, India

Correspondence Address:
Dr. Bharti Malhotra
Department of Microbiology and Immunology, Aadvanced Basic Sciences and Clinical Research Laboratory, (ICMR Grade – I Viral Diagnostics and Research Laboratory), Sawai Man Singh Medical College, Jaipur - 302 004, Rajasthan
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/ijmm.IJMM_17_180

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Context: Acute encephalitis syndrome (AES) is a serious public health problem, caused mainly by viruses. However, the profile of viruses causing AES in Rajasthan is not well characterised. Aims: The present study was undertaken to identify the viruses causing AES and develop diagnostic algorithm so as to help in improved diagnosis, treatment, prevention and control. Settings and Design: The present study is a hospital-based descriptive, observational study. Samples were processed at Grade-1 DHR/ICMR Viral Research and Diagnostic Laboratory at SMS, Jaipur. Subjects and Methods: Cerebrospinal fluid (CSF) samples were processed for IgM antibody detection by enzyme-linked immunosorbent assay (ELISA) for mumps virus (MPV), measles virus (MV), Rubella virus (RV), Japanese encephalitis virus (JEV), West Nile virus (WNV) and Dengue virus using commercial kits. Nucleic acid was extracted from CSF using automated extraction system. Real-time polymerase chain reaction was done using specific primers and probes for Herpes simplex virus (HSV), Varicella-zoster virus (VZV), Epstein-Barr virus (EBV), cytomegalovirus (CMV) and enterovirus (EV). Statistical Analysis Used: Statistical analysis was done using ANOVA. Results: Among 3088 patients, 702 (22.7%) patients were positive for one or more viruses. HSV (261;8.45%) was the most common followed by EBV (173;5.6%), VZV (97;3.1%), CMV (68;2.2%), EV (32;1.03%), MPV (27;0.9%), DV (28;0.9%), MV (19;0.6%) and RV (6;0.2%). Conclusions: AES occurred sporadically in Rajasthan, samples should be tested first for herpes group of viruses followed by EV or/and for arboviruses depending on season or measles, mumps and RVs in children.


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