Multiple parts short answer Essay Example | Topics and Well Written Essays - 250 words - 1

Multiple parts short answer - Essay Example Low ph would, therefore, increase the growth of vibrio cholerae. With continue administration of lethal 50 dose, the bacteria in the body obtain a way to survive in its presence as they get used to it. They, therefore, produce molecules that are known as virulence factors, which enable them to colonize the host. The process occurs when the pathogenic bacteria, vibrio cholerae in this case spreads the virulence factors through the genetic elements that are mobile. The genes are transferred horizontally making the harmless genes obtain the harmful chromosomes from the vibrio cholerae. Through the process, the lethal dose 50% becomes ineffective and has to be changed. 1. Escherichia coli strain A and Escherichia coli strain B are structurally different in their amino acid composition. E. coli A has one polypeptide chain that contains 177 amino acids while the latter has 153 residues (Lowry et al, p 36). The higher weight of E. coli A makes it destructive to its host. 3. The symbiotic relationship between the host and the bacterial pathogen is through the way the host provides the bacteria a habitat and food. The bacterial pathogen facilitates normal physiology in the