This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: general microbiology, Subject name: Microbiology
Significance of Adhesin in Pathogenesis- 
Select and explain. 
A. Motility, B. Bacterial attachment, C. Toxigenicity, D. Bacterial division
B: Bacterial attachment
Answer: B: Bacterial attachment 
Explanation: Adhesion: The initial event in the pathogenesis of many infections is the attachment of the bacteria to body surfaces. This attachment is not a chance event but a specific reaction between surface receptors on host cells and adhesion structures on the surface of bacteria. These adhesive structures are called Adhesins . This attachment is initial step of pathogenesis of an organism in host body Ref: Ananthanarayan & paniker's Textbook of Microbiology 9th edition pg no 74