IMPACT OF MOLECULAR METHOD FOR THE DIAGNOSIS OF ACUTE BACTERIAL MENINGITIS IN A TERTIARY HEALTH CARE CENTRE IN NORTH INDIA
DOI:
https://doi.org/10.11603/ijmmr.2413-6077.2020.1.11103Keywords:
cerebrospinal fluid (CSF), acute bacterial meningitis, PCR, MALDI-TOFAbstract
Background. Acute bacterial meningitis is one of the significant infectious diseases that add an immense burden to the health system. Proper management of meningitis is an invincible need to overcome the severe consequences.
Objectives. The aim of the study is detection of the etiological agents of acute bacterial meningitis by PCR.
Methods. Total 267 CSF samples collected from suspected bacterial meningitis cases were processed for the detection of S. pneumoniae, H. influenzae, N. meningitidis, E. coli and Group B streptococci by conventional and molecular diagnosis method. CSF was inoculated on Blood, chocolate and MacConkey agar plates and incubated at 37 °C for 24-48 hrs. Bacteria grown were identified by Matrix assisted laser desorption/ionization time of flight (MALDI-TOF). Multiplex PCR of the enlisted bacteria was performed using DNA extracted from CSF by DNA extraction kit (Qiagen, USA).
Results. 5 (1.87%) out of the total 267 CSF samples were culture positive (3 S. pneumoniae and 2 E. coli) and 28 (10.49%) had detectable DNA by conventional PCR. Out of these 28 samples, 20 (71.43%) were S. pneumoniae and 8 (28.57%) were E. coli. 15 (53.57%) out of total S. pneumoniae were present in children below 5 years of age. Similarly, E. coli was predominant in neonates. Sensitivity and specificity of the PCR was 100% and 95-98% respectively.
Conclusions. Streptococcus pneumoniae is the commonest cause of community acquired bacterial meningitis in children below five years of age. Hence, for the promising outcome, PCR should be implemented for the diagnosis of acute bacterial meningitis.
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