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Neisseria bacilliformis
''Neisseria bacilliformis '' is a bacterium commonly found living as a commensal in the mucous membranes of mammals. However, depending on host immunocompetence, there have been documented cases of ''N. bacilliformis'' infections of the respiratory tract and oral cavity thus making it an opportunistic pathogen. It was originally isolated from patients being treated in a cancer center. Rarely, a more serious infection such as endocarditis can occur often as a result of a predisposing condition.
==Morphology==
With the exceptions of ''N. elongata'' and ''N. weaveri'', most members of the genus ''Neisseria'' have a cocci or diplococci cellular morphology. However, ''N. bacilliformis'' has a bacillus morphology measuring 0.6 µm by 1.3 µm to 3.0 µm. ''N. bacilliformis'' is nonmotile and it undergoes aerobic respiration. It stains Gram negative and has been successfully cultured on chocolate agar and sheep blood agar. No hemolysis has been observed. Growth has been documented on trypticase soy agar, but the size of the colonies are roughly half that of those cultured on chocolate agar and sheep blood agar. Interestingly, no growth has been achieved on modified Thayer-Martin culture agar, the preferred media for culturing ''N. gonorrhoeae''. Colonies are round, smooth, and have a light gray coloration. It tests positive for the oxidase test and negative for indole production. No acid is produced in the presence of dextrose, lactose, maltose, or sucrose. Some strains are capable of reducing nitrate and producing catalase. All strains that have been isolated thus far have shown susceptibility to antibiotics.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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