Publications by authors named "Tom Chiang"

Establishment of KPC-associated genes into a new region usually requires travellers with hospital admission and their carriage into the communities. In this report, a worldwide spreading clone carrying KPC-3 was isolated from the sputum of a hospitalised patient with a serious infection who had just come from the USA and had been admitted to a New York hospital. By genetic comparison with a strain isolated from New Jersey (NJ-KPC-21), this isolate from the traveller was genetically related.

View Article and Find Full Text PDF

Background: KPC-producing carbapenem-resistant Klebsiella pneumoniae (CRKP) infections are associated with high mortality; however, their virulence determinants are not well defined.

Methods: We investigated the virulence and plasmid transferability among KPC-containing K. pneumoniae isolates.

View Article and Find Full Text PDF

The occurrence of Clostridium difficile colitis is on the rise and has become more difficult to manage with standard therapy. Thus, the need for alternative treatments is essential. Tigecycline is a glycylcycline antibiotic that has been shown to be effective against C.

View Article and Find Full Text PDF

Klebsiella pneumoniae carbapenemase (KPC)-producing Klebsiella pneumoniae infections are associated with high mortality; however, little is known about the virulence determinants of KPC-producing K. pneumoniae. At the Veterans Affairs New Jersey Healthcare System (VA NJHCS), we investigated the virulence and plasmid transferability of 60 clinically unique KPC-containing K.

View Article and Find Full Text PDF

Management of patients with KPC-harboring Enterobacteriaceae has become a significant and challenging scenario. We report three cases of KPC-producing Klebsiella pneumoniae bacteremia that were successfully treated using combination therapy with polymyxin B and other antimicrobials. Serum bactericidal titers were determined and provided additional clinical guidance in the management of such patients.

View Article and Find Full Text PDF

Detection of bla(KPC)-harboring Klebsiella pneumoniae (KP) in the clinical laboratory remains a difficult task. Decreased ertapenem (ERT) susceptibility has been considered one of the most sensitive phenotypic indicators of K. pneumoniae carbapenemase (KPC) production, but has been found to be nonspecific.

View Article and Find Full Text PDF

Intravesical instillation of Bacillus Calmette-Guerin (BCG) is a treatment to prevent recurrence of superficial urothelial bladder carcinoma. Complications after bladder instillation of BCG have been reported including locally invasive and systemic infections due to dissemination of Mycobacterium bovis from the bladder. We present an uncommon case and literature review of prosthetic joint infection due to M.

View Article and Find Full Text PDF

Klebsiella pneumoniae primary liver abscess (KPLA) is an emerging disease that is associated with distant septic complications. We report the first case of KPLA associated with infective endocarditis. The K.

View Article and Find Full Text PDF

We reviewed the effect of adding maraviroc on CD4 cell counts in nine patients on antiretroviral therapy with full viral suppression but impaired CD4 cell recovery. There were no significant differences in changes in CD4 cell count, percentage of CD4 cells, or in the ratio of CD4/CD8 cells at 30 days and 25 weeks of maraviroc therapy. Plasma endotoxin levels measured in four patients before and during maraviroc treatment also showed no significant differences.

View Article and Find Full Text PDF

This case-control study examined the prevalence of enteroaggregative Escherichia coli (EAEC), its genes and elicited inflammatory response, and the stool characteristics of adult patients with and without acute diarrhoeal illness presenting to an urgent-care clinic in the USA. A total of 1004 individual stool specimens (253 from patients with acute diarrhoeal illness and 751 from patients without diarrhoeal illness) were collected between 1 June 2003 and 30 June 2008. EAEC was identified as the sole cause of acute diarrhoeal illness in 6 % (n=15) of patients and in 2 % (n=15) without diarrhoeal illness.

View Article and Find Full Text PDF

Klebsiella pneumoniae isolates harboring KPC enzymes have been identified in many geographical areas since 2001. Numerous problems exist in the detection and treatment of patients with such isolates. The clinical characteristics and molecular epidemiology associated with 12 randomly chosen patients in whom these enzymes were detected by molecular methods are described.

View Article and Find Full Text PDF

Enteroaggregative Escherichia coli (EAEC) is an increasingly recognized enteric pathogen. It is a cause of both acute and persistent diarrhoea among children, adults and HIV-infected persons, in both developing and developed countries. In challenge studies, EAEC has caused diarrhoeal illness with the ingestion of 10(10) c.

View Article and Find Full Text PDF

Background: Conflicting studies exist regarding the role of enteroaggregative Escherichia coli (EAEC) as a cause of acute diarrheal illness. The objective of this meta-analysis was to determine whether identification of EAEC in stool samples is associated with acute diarrheal illness among different subpopulations, by geographic area.

Methods: A comprehensive search of electronic bibliographic databases (Medline and PubMed) from August 1985 to January 2006, as well as a search of conference proceedings, references of articles, and contacts with investigators of EAEC, yielded 354 studies.

View Article and Find Full Text PDF

Objectives: To determine risk factors for ceftazidime-resistant Klebsiella pneumoniae infection and the effect of ceftazidime-resistant K. pneumoniae infection on mortality during an isolated outbreak.

Design: Case-control investigation using clinical and molecular epidemiology and prospective analysis of infection control interventions.

View Article and Find Full Text PDF