<prompt> A 30 year old woman with a bad obstetric history presents with fever. The blood culture from the patient grows gram-positive small to medium coccobacilli that are pleomorphic, occurring in sho chains. Direct wet from the culture shows tumbling motility. The most likely organism is -Listera monocytogenesCorynebacterium spEnterococcus sp.Erysipelothrix rhusiopathiae  <response>: . Ans. is a i.e., Listera monocytogenes . The impoant clues in this question are . Organisms are gram positive coccobacilli . Organisms are pleomorphic and occuring in sho chains. . There is tumbling motility. . All these are the features of Listeria monocytogens. . Corynebacteria are gram positive bacilli not coccobacilli and are nonmotile. . Enterococci group d streptococci are gram positive cocci not coccobacilli and are non motile. 