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. 2002 Feb;100(1-2):107-14.
doi: 10.1016/s0166-0934(01)00404-9.

Genogroup-specific PCR primers for detection of Norwalk-like viruses

Shigeyuki Kojima  1 , Tsutomu Kageyama, Shuetsu Fukushi, Fuminori B Hoshino, Michiyo Shinohara, Kazue Uchida, Katsuro Natori, Naokazu Takeda, Kazuhiko Katayama
Affiliations

Genogroup-specific PCR primers for detection of Norwalk-like viruses

Shigeyuki Kojima et al. J Virol Methods. 2002 Feb.

Abstract

Norwalk-like viruses (NLV) are a major causative agent of nonbacterial gastroenteritis. There are still many NLV strains that are refractory to gene amplification by ordinary reverse transcription-polymerase chain reaction. This is due mainly to the genetic diversity among NLV, especially mismatches in the primer sequences, which limits this technique in clinical utility. In this study, improved primer sets based on the capsid region, to detect both genogroup I and II NLV by genogroup-specific manner, were developed. When stool specimens from gastroenteritis patients, that were positive for NLV by electron microscopy, were tested by this new primer set, all specimens were positive by RT-PCR. Primers described previously for RdRp and capsid protein were capable of amplifying the specimens by 31 and 77%, respectively. Therefore, new primer sets are extremely useful for the amplification and rapid diagnosis of nonbacterial gastroenteritis due to NLV as well as for epidemiological studies.

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