1 Division of Bacteriology, ICMR-National Institute of Cholera and Enteric Diseases, Kolkata, West Bengal, India.
2 Integrative Taxonomy and Microbial Ecology Research Group, Department of Biological Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur, Nadia, West Bengal, India.
3 Department of Neonatology, Institute of Postgraduate Medical Education & Research and SSKM Hospital, Kolkata, West Bengal, India.
4 Division of Electron Microscopy, ICMR-National Institute of Cholera and Enteric Diseases, Kolkata, West Bengal, India.