Microbiology General bd86be75 Most common organism which can contaminates crowded army camps is ? A Klebsiella B E. coli C Neisseria meningitidis D Staphylococcus High-Yield Explanation Ans. is 'c' i.e., Neisseria meningitidis Epidemics of Neisseria meningitidis usually occur in closed crowded conditions like jails or army camps.