Neisseria bacilliformis
| Neisseria bacilliformis | |
|---|---|
| Scientific classification | |
| Kingdom: | Bacteria |
| Phylum: | Proteobacteria |
| Class: | Betaproteobacteria |
| Order: | Neisseriales |
| Family: | Neisseriaceae |
| Genus: | Neisseria |
| Species: | N. bacilliformis |
| Binomial name | |
|
Neisseria bacilliformis Han, et al., 2006 |
|
| Type strain | |
|
CCUG 50858 T |
|
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.
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.
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