1.Rapid Diagnosis of Leptospirosis by Multiplex PCR
Siti Aminah Ahmed ; Doblin Anak Sandai ; Suzana Musa ; Chee Hock Hoe ; Mehdi Riadzi ; Kwok Leong Lau ; Thean Hock Tang
Malaysian Journal of Medical Sciences 2012;19(3):9-16
Background: Traditionally, the most common diagnostic approach used for diagnosing leptospirosis was the demonstration of immune-seroconversion in acute and convalescent patient serum samples. Recently, a variety of molecular techniques, including conventional and real-time polymerase chain reaction (PCR), have been developed for the specific detection of pathogenic bacteria from the genus Leptospira. PCR is a sensitive, specific, and rapid technique that has been successfully used to detect several microorganisms; including those of clinical significance.
Methods: In this study, we developed a multiplex PCR (mPCR) assay for detecting Leptospira’s DNA. The mPCR assay detects both the 16S rRNA gene and the major outer membrane lipoprotein gene, which is known as LipL32. Representative serovars were tested from 10 species of Leptospira and 23 other species of bacteria.
Results: A positive result was obtained from all leptospiral serovars. The amplification sensitivity for the multiplex assay was 21.8 pg and 1 x 103 leptospires/ml. This mPCR assay has the potential to facilitate a rapid and sensitive diagnosis for acute leptospirosis.
Conclusion: The mPCR assay developed in this study can be used for the early detection of leptospirosis. The LipL32 gene could also serve as another target to aid in the efficient detection of leptospiral infection because using 2 sets of primers in mPCR increases the sensitivity and specificity of the test.
2.Comparison of DR. HPV Chip Kit with hybrid capture II assay for the detection of human papillomavirus in clinical samples: a preliminary study.
Saini Rajan ; Tae H Shen ; Jacinta Santhanam ; Nor Hayati Othman ; Norodiyah Othman ; Tang Thean Hock
Tropical biomedicine 2007;24(1):17-22
Human papillomavirus (HPV) is well known as an etiological factor for the development of anogenital carcinomas. The aim of our study was to compare the performance of USFDA approved Hybrid II (HCII) Assay and recently introduced DR. HPV Chip Kit for the detection of HPV DNA in clinical cervical scrapings from 40 patients. HPV DNA testing was performed using the automated HCII Assay system and DR. HPV Chip Kit. Taking cytological results as gold standard, it was found that HCII was more sensitive (36.4%) than DR. HPV Chip Kit (18.2%) although specificity was 100% with the latter method. In addition, both these molecular methods had comparable negative and positive predictive values. It was concluded that both HCII and DR. HPV Chip Kit have comparable specificity. However, sensitivity for detection of HPV in clinical samples with HCII is almost double as compared to DR. HPV Chip Kit.
Papillomavirus, Human
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User-Computer Interface
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assay
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Clinical
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Hybrids
3.Interleukin-28 Polymorphism: Ethnic variations and the response to chronic hepatitis C treatment in Malaysia
Chee-Hoong HOE ; Mohd Azri Mohd Suan ; Chee-Hock HOE ; Thean-Hock TANG ; Kuang-Kiat KIEW ; Muhammad Radzi Abu Hassan ; Huan-Keat CHAN
The Medical Journal of Malaysia 2018;73(4):260-260
comprehensive overview of chronic hepatitis C (CHC)management.1 The author highlighted the concern over theexorbitant cost of direct-acting antivirals, which is the reason for their limited use in Malaysia currently. Based on the findings of the previous studies, the author also underlined that Asians receiving the conventional, interferon-based treatment generally have a higher sustained virological response (SVR) rate as compared with Caucasians and African Americans, mainly due to the interleukin-28B (IL28) single nucleotide polymorphism (SNP) across different ethnic populations. Nonetheless, to date, information on the variations in IL-28 genotypes among different ethnic groups in Malaysia is still limited.