This book aims to acquaint medical students with various sub-branches of medical microbiology in question-answer format. Part I of the book has been revised with addition of bulk of new questions with their explanatory answers. Keeping abreast the students to current developments in this upcoming specialty of medical microbiology, Part II has been enlarged by adding latest information in the form of additional topics covering current information on Helicobacter pylori, biofilms, updated microbial investigations, medical mycology, extended-spectrum beta-lactamase (ESBL), etc.