Cardiobacterium: A genus of gram-negative, facultatively anaerobic bacteria in the family CARDIOBACTERIACEAE. It is found in the nasal flora of humans and causes ENDOCARDITIS.Kingella: A genus of gram-negative, aerobic, rod-shaped bacteria whose organisms are part of the normal flora of the mucous membranes of the upper respiratory tract. Some species are pathogenic for man.Eikenella: A genus of gram-negative, facultatively anaerobic, rod-shaped bacteria that occurs in the human mouth and intestine. Organisms of this genus can be opportunistic pathogens.Neisseriaceae: A family of gram-negative, parasitic bacteria including several important pathogens of man.Endocarditis, Bacterial: Inflammation of the ENDOCARDIUM caused by BACTERIA that entered the bloodstream. The strains of bacteria vary with predisposing factors, such as CONGENITAL HEART DEFECTS; HEART VALVE DISEASES; HEART VALVE PROSTHESIS IMPLANTATION; or intravenous drug use.Eikenella corrodens: Gram-negative bacteria isolated from infections of the respiratory and intestinal tracts and from the buccal cavity, intestinal tract, and urogenital tract. They are probably part of the normal flora of man and animals.Gram-Negative Bacterial Infections: Infections caused by bacteria that show up as pink (negative) when treated by the gram-staining method.Haemophilus: A genus of PASTEURELLACEAE that consists of several species occurring in animals and humans. Its organisms are described as gram-negative, facultatively anaerobic, coccobacillus or rod-shaped, and nonmotile.RNA, Ribosomal, 16S: Constituent of 30S subunit prokaryotic ribosomes containing 1600 nucleotides and 21 proteins. 16S rRNA is involved in initiation of polypeptide synthesis.