Is Eikenella gram-negative?
Eikenella corrodens is a microaerophilic gram-negative rod which is a normal inhabitant of human mucosal surfaces, particularly the oral cavity.
Does Eikenella grow on MacConkey Agar?
E. Corrodens does not grow on MacConkey agar. Generally, the organism is biochemically inactive, lacking oxidative and fermentative capabilities and failing to produce urease, indole or hydrogen sulfide (h2S).
Is Eikenella Corrodens motile?
Eikenella corrodens is a fastidious, facultative anerobic, non-motile, gram-negative bacilli that is part of the normal flora of the mouth and upper respiratory tract.
Does Eikenella grow on blood agar?
The invasive strain forms on the surface of blood agar when conditions are 36 °C, with 15% CO2 and 100% humidity. Colony diameter ranges from 0.2 mm to 0.5 mm (after 24 h culture) or from 0.5 mm to 1.0 mm (after 48 h culture).
How do you identify Eikenella Corrodens?
Isolates of Eikenella species were identified as a slow-growing, gram-negative, nonmotile, facultative rod that grew well on blood agar in 5% carbon dioxide. The characteristic pitting of the agar, greenish discoloration around the colonies, and a musty or bleach-like odor helped our laboratory identify this organism.
Is Eikenella aerobic or anaerobic?
Eikenella Species. Eikenella corrodens is a fastidious facultative anaerobic gram-negative bacillus that is present as endogenous microbiota in the mouth and upper respiratory tract as well as on other mucosal surfaces.
How do I know if I have Eikenella?
Is Eikenella catalase positive?
Eikenella corrodens is a small straight rod that can appear coccobacillary. The organism is oxidase-positive and ornithine decarboxylase-positive, reduces nitrates to nitrites, but does not produce catalase, urease, or indole.
Is Diplococci gram-negative?
Types. Examples of gram-negative diplococci are Neisseria spp. and Moraxella catarrhalis. Examples of gram-positive diplococci are Streptococcus pneumoniae and Enterococcus spp.
What is few Gram-negative diplococci?
Types. Examples of gram-negative diplococci are Neisseria spp. and Moraxella catarrhalis. Examples of gram-positive diplococci are Streptococcus pneumoniae and Enterococcus spp. Presumably, diplococcus has been implicated in encephalitis lethargica.
What are intracellular Gram-negative diplococci?
Neisseria gonorrhoeae is a Gram negative, coffee-bean shaped intracellular diplococcus bacterium responsible for gonorrhoea which is one of the classical sexually transmitted infections (STIs) [1]. The causative organism is highly adapted to the genital tract and often causing asymptomatic and undetected infection [2].
Is chlamydia Gram-negative diplococci?
Chlamydia trachomatis is an intracellular, Gram-negative bacterium in the Chlamydiaceae family. Infections caused by Chlamydia trachomatis include trachoma (chronic infection of the eye) and infection of the urogenital tract. The main transmission path is direct or indirect contact with contaminated persons or objects.