No abstract available.
Immunocompromised Host* ; Kluyvera* ; Sepsis*

Kluyvera ascorbata, a new species in the family Enterobacteriaceae, has been rarely isolated from environmental and clinical specimens. It is a potentially dangerous pathogen that can cause serious infection of various organs. Recently, we treated a 32-year old woman, who developed cholangitis about 3 years after excisional operation for type IVa choledochal cyst. K. ascorbata was recovered from her blood. Empirical antibiotic treatment with intravenous ceftriaxone for 7 days followed by oral ciprofloxacin for 5 days was successful. This is the first well-documented case of bacteremia due to K. ascorbata cholangitis in the world.
Adult ; Bacteremia* ; Ceftriaxone ; Cholangitis ; Choledochal Cyst* ; Ciprofloxacin ; Enterobacteriaceae ; Female ; Humans ; Kluyvera*

BACKGROUND: In clinical microbiology the accurate and rapid identification of members of the family Enterobacteriaceae is essential for diagnostic and therapeutic purposes and for epidemiologic studies. Accuracy of identification system depends mainly on data base such as positive rate of biochemical reactions, relative frequency of occurrence of biotype, and isolation frequency of microorganisms. The purpose of this study was to analyze the isolation rate and biotype frequency of the family Enterobacteriaceae isolated from tertiary care hospital in Korea. METHODS: Isolation frequency of the family Enterobacteriaceae isolated from clinical specimens during the period of January 1998 to June 1998 were analyzed. And biochemical phenotypes of 2,022 isolates tested by 10 tube system consisting of 14 conventional biochemical tests were also analyzed. RESULTS: Isolation rate of the family Enterobacteriaceae to the genus level in order of decreasing frequency were Escherichia (37.0%), Serratia (15.9%), Klebsiella (14.9%), Enterobacter (11.1%), Providencia (8.1%), Citrobacter (2.8%), Proteus (2.5%), Morganella (2.4%), Salmonella (2.4%), and Cedecea (0.7%). Among the genus of the family Enterobacteriaceae, Budvicia, Edwardsiella, Ewingella, Hafnia, Kluyvera, Leminorella, Moellerella, Shigella, Tatumella, Xenorhabdus, Yersinia, and Yokenella were not isolated. The number of species and genus of the family Enterobacteriaceae by this study were 48 and 12, respectively. Over 95% of all clinical isolates belonged to only 25 species. CONCLUSIONS: Although these data about frequency of relative isolation rate and biotype patterns of the family Enterobacteriaceae is inadequate according to species and genus, yet these data will be utilized for the application and development of identification method of the family Enterobacteriaceae.
Citrobacter ; Edwardsiella ; Enterobacter ; Enterobacteriaceae* ; Escherichia ; Hafnia ; Humans ; Klebsiella ; Kluyvera ; Korea ; Morganella ; Phenotype ; Proteus ; Providencia ; Salmonella ; Serratia ; Shigella ; Tertiary Healthcare ; Xenorhabdus ; Yersinia

BACKGROUND: Kluyvera, a new genus in the family Enterobacteriaceae, has been rarely isolated from clinical specimens and regarded as an opportunistic pathogen. Although there were several case reports in Korea, most of them were reported at a genus level except a case of K. cyrocrescens. We isolated Kluyvera species from seven patients from July 1996 to January 1999. We identified them to species level and investigated their clinical significance. METHODS: The medical records of seven patients were reviewed for demographical findings, underlying diseases, diagnoses, the association of Kluyvera isolates with disease, antibiotic treatments, and clinical outcomes. Eight strains were identified and tested for the antimicrobial susceptibilities by MicroScan Neg Combo type 14 and 21 Panel(Dade Behring, USA). Five of the eight strains had been stored at -70degrees C and were tested for ascorbate fermentation, the ability to grow and ferment glucose at 5degrees C, and the zone of inhibition around carbenicillin and cephalothin. RESULTS: Kluyvera isolates were regarded as true pathogens in six of seven cases including Hickman-catheter associated sepsis(HCAS), empyema, peritonitis, necrotizing cholecystitis, sepsis, and liver abscess although the latter four cases yielded mixed cultures. While three of the six patients had underlying diseases, malignant lymphoma, hepatocellular carcinoma and stomach cancer, other three were previousely healthy. Most of them were improved with an empirical therapy, but Kluyvera species was repeatedly isolated from the HCAS case in spite of the antibiotic treatment; it was cured bacteriologically after the removal of the catheter. The five isolates were all confirmed to be K. ascorbata by positive ascorbate test, and failure to grow at 5degrees C. CONCLUSIONS: Six of the seven cases including three with no underlying diseases, isolates of Kluyvera species were found clinically significant, suggesting that Kluyvera species is potentially pathogenic in healthy individuals as well as compromized hosts. MicroScan system is capable of identifying Kluyvera species at the genus level, but not at the species level. The ascorbate test is simple and useful for differ entiation of K. ascorbata from K. cryocrescens.
Carbenicillin ; Carcinoma, Hepatocellular ; Catheters ; Cephalothin ; Cholecystitis ; Diagnosis ; Empyema ; Enterobacteriaceae ; Fermentation ; Glucose ; Humans ; Kluyvera* ; Korea ; Liver Abscess ; Lymphoma ; Medical Records ; Peritonitis ; Sepsis ; Stomach Neoplasms