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  1. Hassan H, Cheng SC
    Malays J Pathol, 1991 Jun;13(1):29-31.
    PMID: 1795558
    Gas-Liquid chromatography (GLC) was used to detect the presence of isocaproic acid produced by Clostridium difficile from 54 stool samples grown in cycloserine-cefoxitin broth. Isocaproic acid was detected in 12 samples of which 5 were confirmed to be Clostridium difficile by culture and biochemical tests. The detection of isocaproic acid by GLC together with the presence of presumptive colonies on primary selective culture media provides a more rapid laboratory diagnosis for Clostridium difficile.
  2. Chai WL, Hamimah H, Cheng SC, Sallam AA, Abdullah M
    J Oral Sci, 2007 Jun;49(2):161-6.
    PMID: 17634730
    The purpose of this study was to investigate the antimicrobial efficacy of six groups of antibiotics and calcium hydroxide against Enterococcus faecalis biofilm in a membrane filter model. Two-day-old E. faecalis (ATCC 29212) biofilm was exposed to ampicillin, co-trimoxazole, erythr omycin, oxytetracycline, vancomycin, vancomycin followed by gentamicin, Ca(OH)(2), and phosphate-buffered saline (control). After 1 h of exposure, the antimicrobial activity was neutralized by washing each disc five times in PBS, and then the colony-forming units of the remaining viable bacteria on each disc were counted. The results revealed that only erythromycin, oxytetracycline and Ca(OH)2 showed 100% biofilm kill. An ANOVA with a Bonferroni post hoc test (P < 0.05) detected significant differences among the test agents, except in the ampicillin group versus the co-trimoxazole group. It is concluded that erythromycin, oxytetracycline and Ca(OH)2 are 100% effective in eliminating E. faecalis biofilm, whereas ampicillin, co-trimoxazole, vancomycin, and vancomycin followed by gentamicin are ineffective.
  3. Chua PK, Corkill JE, Hooi PS, Cheng SC, Winstanley C, Hart CA
    Emerg Infect Dis, 2005 Feb;11(2):271-7.
    PMID: 15752446
    An obligate intracellular bacterium was isolated from urine samples from 7 (3.5%) of 202 fruit bats (Eonycteris spelaea) in peninsular Malaysia. The bacterium produced large membrane-bound inclusions in human, simian, and rodent cell lines, including epithelial, fibroblastlike, and lymphoid cells. Thin-section electron microscopy showed reticulate bodies dividing by binary fission and elementary bodies in the inclusions; mitochondria surrounded the inclusions. The inclusions were positive for periodic acid-Schiff stain but could not be stained by fluorescein-labeled anti-Chlamydia trachomatis major outer membrane protein monoclonal antibody. The bacterium was resistant to penicillin and streptomycin (MICs > 256 mg/L) but susceptible to tetracycline (MIC = 0.25 mg/L) and chloramphenicol (MIC = 0.5 mg/L). Sequence analysis of the 16SrRNA gene indicated that it was most closely related to 2 isolates of Waddlia chondrophila (94% and 96% identity). The 16S and 23S rRNA gene signatures were only 91% identical. We propose this novel bacterium be called W. malaysiensis.
  4. Tantavisut S, Ho KY, Arandia EF, Cheng SC, Eiamtanasate S, Jarayabhand R, et al.
    Cureus, 2023 Jun;15(6):e41156.
    PMID: 37525772 DOI: 10.7759/cureus.41156
    INTRODUCTION: Multimodal analgesia is key in the effective management of acute pain. Previous clinical trials have demonstrated good results with the use of a fixed-dose combination (FDC) of tramadol 75 mg and dexketoprofen 25 mg (TRAM/DKP) in acute pain management. However, there is a dearth of real-world evidence on the efficacy and safety of this combination in the management of acute non-surgical pain, especially among Asian patients. The case series reported herein investigates the real-world experiences of physicians and Asian patients with the use of TRAM/DKP FDC in the management of acute non-surgical pain.

    METHODS: Data were collected retrospectively on 11 Asian patients across multiple hospitals who had received a short course of TRAM/DKP FDC for acute non-surgical orthopaedic and non-orthopaedic pain. Data on baseline characteristics, medical history, treatment regimen, clinical outcomes, and patient satisfaction were compiled and shared at a peer-to-peer expert meeting in October 2022.

    RESULTS: All patients experienced a reduction in pain intensity and were very satisfied with pain management, with a mean satisfaction score of 4.3/5. Five patients (range: 63-74 years) experienced mild adverse events, including nausea, vomiting, and dizziness, which resolved with no need for additional treatment in the majority of cases. No serious adverse events were recorded.

    CONCLUSION: Asian patients with acute non-surgical orthopaedic and non-orthopaedic pain achieved good pain control with TRAM/DKP FDC. The regimen was well tolerated, and patients reported high levels of satisfaction with the outcomes, indicating that TRAM/DKP FDC is an effective choice for the control of acute non-surgical pain in Asian patients.

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