Which of the following bacterium is non-motile? (D. REPEAT 2013): (A) Klebsiella spp., (B) Citrobacter spp., (C) Escherichia spp., (D) Salmonella spp.
Answer is A. Ref: Colour Atlas and Textbook of Medical Microbiology. Elmer W Koneman, 5th edition, Page 195Explanation:Please note that all the bacteria asked in the options are members of the Enterobacteriaceae.Here is a list of enterobacteriaceae members with their motilitv.Motile Enterobacteriaceae aceae membersNon-motile Enterobacteri- membersEscherichia col iShigella spp.Edwardsiella tardaKlebsiella spp.Salmonella spp.Yersinia pestisCitrobacter spp.(Mnemonic: SKY )Enlerobacter spp. Hafnia Panloea Proteus spp. Morganella Providencia spp. Organisms with different motility at two different temperatures:o Enterobacteriaceae member - Yersinia enterocolitica.o Non-enterobacteriaceae member - Listeria monocytogenes.