1/4. Laribacter hongkongensis gen. nov., sp. nov., a novel gram-negative bacterium isolated from a cirrhotic patient with bacteremia and empyema.A bacterium was isolated from the blood and empyema of a cirrhotic patient. The cells were facultatively anaerobic, nonsporulating, gram-negative, seagull shaped or spiral rods. The bacterium grows on sheep blood agar as nonhemolytic, gray colonies 1 mm in diameter after 24 h of incubation at 37 degrees C in ambient air. growth also occurs on MacConkey agar and at 25 and 42 degrees C but not at 4, 44, and 50 degrees C. The bacterium can grow in 1 or 2% but not 3, 4, or 5% NaCl. No enhancement of growth is observed with 5% CO(2). The organism is aflagellated and nonmotile at both 25 and 37 degrees C. It is oxidase, catalase, urease, and arginine dihydrolase positive, and it reduces nitrate. It does not ferment, oxidize, or assimilate any sugar tested. 16S rRNA gene sequencing showed that there are 91 base differences (6.2%), 112 base differences (7.7%), and 116 base differences (8.2%) between the bacterium and Microvirgula aerodenitrificans, Vogesella indigofera, and chromobacterium species, respectively. The G C content (mean and standard deviation) is 68.0% /- 2.43%, and the genomic size is about 3 Mb. Based on phylogenetic affiliation, the bacterium belongs to the neisseriaceae family of the beta-subclass of proteobacteria. For these reasons, a new genus and species, Laribacter hongkongensis gen. nov., sp. nov., is proposed, for which HKU1 is the type strain. Further studies should be performed to ascertain the potential of this bacterium to become an emerging pathogen.- - - - - - - - - - ranking = 1keywords = cell (Clic here for more details about this article) |
2/4. neisseria sicca endocarditis complicating pregnancy. A case report.neisseria sicca, a commensal organism of the oropharynx, has rarely been implicated as a pathogen responsible for causing bacterial endocarditis. A pregnant woman developed N sicca endocarditis at 32 weeks' gestation. Although there was an initial delay in diagnosis and therapy, the maternal and fetal outcomes were excellent.- - - - - - - - - - ranking = 1keywords = cell (Clic here for more details about this article) |
3/4. Pre-septal cellulitis and facial erysipelas due to moraxella species.We describe a patient with an acute ulcerated pre-septal cellulitis with subsequent spread across the face, in whom conjunctival swabs demonstrated the presence of moraxella species. Unusually, this organism was resistant to penicillin. Clinical improvement was only achieved when treatment with co-amoxiclav was commenced on the basis of the antibiotic sensitivities demonstrated by culture of this organism. moraxella species are rare skin pathogens but may be underestimated as they usually respond to a wide range of antibiotics; they should be considered as a cause of facial cellulitis or erysipelas which responds poorly to conventional therapy.- - - - - - - - - - ranking = 6keywords = cell (Clic here for more details about this article) |
4/4. moraxella catarrhalis bacteremia and preseptal cellulitis.Invasive disease due to moraxella catarrhalis is rare and has been associated mostly with immune deficiency conditions. We describe the first case of M catarrhalis bacteremia and preseptal cellulitis in an immunocompetent infant. This organism may be evolving from one with low pathogenicity to one with increased pathogenicity.- - - - - - - - - - ranking = 5keywords = cell (Clic here for more details about this article) |