Rapid diagnosis of herpes simplex virus infection by a loop-mediated isothermal amplification method

Yoshihiko Enomoto, Tetsushi Yoshikawa, Masaru Ihira, Shiho Akimoto, Fumi Miyake, Chie Usui, Sadao Suga, Kayoko Suzuki, Takashi Kawana, Yukihiro Nishiyama, Yoshizo Asano

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101 Citations (Scopus)


Primers for herpes simplex virus type 1 (HSV 1)-specific loop-mediated isothermal amplification (LAMP) method amplified HSV-1 DNA, while HSV-2-specific primers amplified only HSV-2 DNA; no LAMP products were produced by reactions performed with other viral DNAs. The sensitivities of the HSV-1- and HSV-2-specific LAMP methods, determined by agarose gel electrophoresis, reached 500 and 1,000 copies/tube, respectively. The turbidity assay, however, determined the sensitivity of the HSV-1- and HSV-2-specific LAMP methods to be 1,000 and 10,000 copies/tube, respectively. After initial validation studies, 18 swab samples (in sterilized water) collected from patients with either gingivostomatitis or vesicular skin eruptions were examined. HSV-1 LAMP products were detected by agarose gel electrophoresis in the 10 samples that also demonstrated viral DNA detection by real-time PCR. Nine of these 10 samples exhibited HSV-1 LAMP products by turbidity assay. Furthermore, both the agarose gel electrophoresis and the turbidity assay directly detected HSV-1 LAMP products in 9 of the 10 swab samples collected in sterilized water. Next, we examined the reliability of HSV type-specific LAMP for the detection of viral DNA in clinical specimens (culture medium) collected from genital lesions. HSV-2 was isolated from all of the samples and visualized by either agarose gel electrophoresis or turbidity assay.

Original languageEnglish
Pages (from-to)951-955
Number of pages5
JournalJournal of clinical microbiology
Issue number2
Publication statusPublished - 02-2005

All Science Journal Classification (ASJC) codes

  • Microbiology (medical)


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