Unchalee Tattawasart

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Burkholderia pseudomallei is a Gram-negative saprophytic bacterium that causes severe sepsis with a high mortality rate in humans and a vaccine is not available. Bacteriophages are viruses of bacteria that are ubiquitous in nature. Several lysogenic phages of Burkholderia spp. have been found but information is scarce for lytic phages. Six phages, ST2, ST7,(More)
BACKGROUND Burkholderia pseudomallei, a gram-negative bacterium that causes melioidosis, was reported to produce biofilm. As the disease causes high relapse rate when compared to other bacterial infections, it therefore might be due to the reactivation of the biofilm forming bacteria which also provided resistance to antimicrobial agents. However, the(More)
AIMS To identify and characterize the lysis gene cassette from the bacteriophage ST79 that lyses Burkholderia pseudomallei. METHODS AND RESULTS Approximately 1·5 kb of ST79 lysis genes were identified from the phage genome data. It was composed of holin, peptidase M15A or endolysin, lysB and lysC. Each gene and its combinations were cloned into(More)
Burkholderia pseudomallei, a gram-negative bacillus found in soil and water, is the causative agent of melioidosis. It can produce a biofilm, which increases resistance to antibacterial agents. Bacteriophages (phages) have been suggested as alternative antibacterial agents. In this study, the ability of six phages (family Myoviridae) to lyse B. pseudomallei(More)
PCR-based detection of Myoviridae lysogenic phages in Burkholderia pseudomallei was developed using primers targeting K96243 prophage GI2, phiE12-2 and phi52237/phiX216. Investigation of 50 clinical and 50 environmental (soil) isolates revealed that K96243 prophage GI2 was the most common (48%) among the isolates, followed by phiE12-2 (38%) and(More)
An enzyme-linked immunosorbent assay (ELISA) and a dot immunoassay with culture-filtrated antigen were developed for detection of Burkholderia pseudomallei specific antibodies in melioidosis patients. Sixty-eight sera of bacteriologically confirmed melioidosis patients, 45 sera of other bacterial infected patients and 80 sera of healthy blood donors from(More)
Immunological characterization of various Pseudomonas pseudomallei preparations was carried out by SDS-PAGE and Western blot using sera from infected humans and from patients with other bacterial infections. Somatic (SOM) and partially purified cell extracts (PCE) gave more complex SDS-PAGE patterns: M(r) ranged from 86 to 12.7 and 48 to 10 kDa,(More)
Multidrug resistance in V. cholerae has been increasing around the world including northeastern Thailand. The aquatic environment is a reservoir of V. cholerae and might be an important source of resistant strains. The aims of this study were to investigate the phylogenetic relationships of intSXT gene sequences from 31 clinical and 14 environmental V.(More)
The lytic phage ST79 of Burkholderia pseudomallei can lyse a broad range of its host including antibiotic resistant isolates from within using a set of proteins, holin, lysB, lysC and endolysin, a peptidoglycan (PG) hydrolase enzyme. The phage ST79 endolysin gene identified as peptidase M15A was cloned, expressed and purified to evaluate its potential to(More)