Bhaswati Ghoshal1, Subhrajit Lahiri1, Kalyanbrata Mandal2, Debasmita Bandyopadhyay3, Amit Majumdar4
1Dept. of Pediatric Medicine Calcutta National Medical College
2Department of Pediatric Medicine North Bengal Medical College
3Department of Microbiology, Nilratan Sarkar Medical College
4Department of Microbiology. Calcutta Medical College