No abstract available.
Cephalosporins* ; Pneumonia* ; Salicylates*

No abstract available.
HL-60 Cells* ; Humans

No abstract available.
Ciprofloxacin* ; Vibrio vulnificus* ; Vibrio*

No abstract available.
Quinolones* ; Vibrio vulnificus* ; Vibrio*

The questions concerning storage temperature and storage duration of the fortified ophthalmic antibiotic solutions are raised. The aim of the current study is to evaluate the influence of fortified ophthalmic antibiotic solutions on its biological and physical properties according to the storage temperature and duration as time goes by. We examined the changes of pH, absorbance spectra, and anti-microbial activity of cefradine(63mg/ml)and gentamicin sulfate(13.6mg/ml) over a four-week period. The results were as follows: There was no difference between the potency of fortified GM solutions stored at 4 degrees C and that at 24 degrees C for 4 weeks. The cefradine stored 24 degrees C exhibited significant changes in both its tJotency and stability after ithe seventh day of storage. The cefradine stored at 4 degrees C exhibited changes in Its absorbance spectra day by day and potency after 14th day.
Cephradine ; Gentamicins ; Hydrogen-Ion Concentration ; Ophthalmic Solutions*

To evaluate the role of capsular polysaccharide (CPS) as a virulence factor, the interaction of V. vulnificus with mouse peritoneal macrophages and serum, which are involved in the clearance of bacteria from blood and other tissues, were examined. In this study, MO6-24/0 (wild strain; hemolysin- and capsule-positive), MO6-24/I' (acapsular spontaneous mutant), CVD 752 (acapsular transposon mutant), and CVD 707 (hemolysin-negative and capsule-positive mutant) were used. The strain with CPS (MO6-24/0 and CVD 707) were more resistant to phagocytosis by mouse peritoneal macrophages compared with acapsular strains (MO6-24/T and CVD 752), and the resistance to phagocytosis was not changed by serum opsonin in the capsular strains. Acapsular strains were more susceptible to serum bactericidal activity than the capsular strains through the classical complement pathway. MO6-24/0 strain were detected in blood, spleen, liver and lung at 4 hours after intraperitoneally infection, whereas CVD 752 were not detected. All tested strains could induced the transcription of inflammatory cytokine gene such as IL-1, IL-6, IL-10 and TNF-u, and their inductions were not decreased by cytochalasin B treatment. This results demonstrate that CPS of V. vulnificus plays an important role in V. vulnificus infection through interfering nonspecific host defense system such as blood clearance and phagocytosis.
Animals ; Bacteria ; Complement Pathway, Classical ; Cytochalasin B ; Interleukin-1 ; Interleukin-10 ; Interleukin-6 ; Liver ; Lung ; Macrophages, Peritoneal ; Mice ; Phagocytosis ; Spleen ; Vibrio vulnificus* ; Vibrio* ; Virulence*

No abstract available.
Calcium* ; Cholera Toxin* ; Cholera* ; Cytoplasm* ; Humans* ; T-Lymphocytes*

Staphylococcus aureus induces chronic infection in form of biofilm that exists in the host cells and arthroplastic prosthesis surface. In this study, the biofilm formation ability of S. aureus clinically isolated from bacteremia patients, biofilm processing and relationship of resistance to antibiotics, and difference of biofilm formation ability on different prosthetic material surfaces were studied. All of them formed biofilm and especially 6 strains of S. aureus had high ability of biofilm formation. In addition, it was found that some strains with higher biofilm formation ability make more higher polysaccharide layer production. When S. aureus ATCC 25923 forms biofilm, minimal bactericidal concentration (MBC) of biofilm bacteria is more increased than that of the planktonic state bacteria about one thousand folds. Especially, after 6 hours from starting on biofilm formation, the resistance to antibiotics was increased by more than 256 microgram/ml of MBC to every antibiotics and after 8 hours prominent increase (more than 4096 microgram/ml) was noted. Biofilm formation after bacterial adherence to plastic cover-slip was increased with time-dependent manner. Microcolonies were formed after 5 hours from a point that bacteria adhere to plastic cover-slip surface and after 6 hours biofilm was diffusely formed on entire surface, and then after 8 hours very thick biofilm was formed. Thicker biofilm was found on cobalt-chromium than titanium surface. These results suggest that titanium alloy materials are better than cobalt-chromium to minimize S. aureus biofilm formation on the arthroplastic material surface. Also, when microcolonies are formed after adherence of S. aureus to the arthroplastic material surface, resistance to antibiotics is starting.
Alloys ; Anti-Bacterial Agents ; Bacteremia ; Bacteria ; Biofilms ; Humans ; Plankton ; Plastics ; Prostheses and Implants ; Staphylococcus ; Staphylococcus aureus ; Titanium

Enteropathogenic Escherichia coli (EPEC) have been implicated in human diarrhea in several countries. Central to EPEC-mediated disease is its ability to cause intestinal lesions, known as attaching and effacing (A/E) lesion. We investigated 92 EPEC strains isolated from patients with diarrhea in Gwangju for their genotypic and phenotypic characteristics. Sixteen (17.4%) of all strains were found to be typical EPEC because they were bfpA gene positive by PCR. The most of typical EPEC isolates (87.5%) showed a localized adhesion (LA) pattern in Hep-2 cell adherence assay, whereas, only 11 atypical EPEC isolates (14.5%) were adhered to Hep-2 cells in a localized manner. Thirteen of the EPEC strains studied belonged to classical O-serogroups of EPEC and 7 isolates were classified as nonclassical EPEC serogroup and the other isolates could not be serotyped with our antisera. The subtypes of eae, tir, espA and espB genes which are major virulence genes concerned of A/E lesion on chromosome were analyzed by multiplex PCR for finding the original resource. The results showed that the composition of these genes subtypes was homogenous and heterogenous in 12 and 26 isolates, respectively. The others were non-determined type in terms of the gene subtype because of genetic diversity of intimin-coding eae genes. Our findings indicated that EPEC isolates from patients with diarrhea were diverse genetically and phenotypically, which require further study in regard to their virulence and epidemiological significance.
Diarrhea ; Enteropathogenic Escherichia coli* ; Genetic Variation ; Gwangju* ; Humans ; Immune Sera ; Multiplex Polymerase Chain Reaction ; Polymerase Chain Reaction ; Virulence

Benign endobronchial tumors are rare diseases with an incidenced of between 1 and 5% of all lung tumors. An endobronchial fibroepithelial polyp is an extremely rare form of benign bronchial tumor. Clinically, an endobronchial fibroepithelial polyp causes an airway obstruction and obstructive pneumonitis as does other endobronchial tumors. Therefore, it is important to differentiate an endobronchial fibroepithelial polyp pathologically from other benign endobronchial tumors and bronchogenic carcinomas. Here, we report a case of an endobronchial fibroepithelial polyp, in a 25-year-old man who had suffered from chest discomfort upon deep breathing with a brief review of the relevant literature.
Adult ; Airway Obstruction ; Carcinoma, Bronchogenic ; Humans ; Lung ; Pneumonia ; Polyps* ; Rare Diseases ; Respiration ; Thorax