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Journal of Clinical Microbiology, March 2002, p. 794-798, Vol. 40, No. 3
0095-1137/02/$04.00+0     DOI: 10.1128/JCM.40.3.794-798.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.

Food-Borne Outbreak of Gastroenteritis Associated with Genogroup I Calicivirus

P. J. Hugo Johansson,1* Maria Torvén,2 Ann-Christin Hammarlund,1 Ulla Björne,1 Kjell-Olof Hedlund,2 and Lennart Svensson2

Hospital Infection Control Unit, Clinical Microbiology Laboratory, University Hospital of Lund, Lund ,1 Department of Virology, Swedish Institute for Infectious Disease Control, Stockholm, Sweden2

Received 16 April 2001/ Returned for modification 9 September 2001/ Accepted 15 December 2001

An outbreak of gastroenteritis affecting 158 of 219 (72%) guests and employees at a hotel is described. Food served at the hotel restaurant is believed to have been the source of the outbreak and to have been contaminated by sick employees working in the restaurant. A secondary attack rate of 22% was seen involving 43 persons in all. In stool specimens from seven of eight patients, Norwalk-like viruses (NLVs) were detected by electron microscopy. While NLV-specific PCR using primers JV12 and JV13 were negative, all specimens examined with primers NVp69 and NVp110 were positive. The failure of primers JV12 and JV13 was attributed to several mismatches in the JV12 primer. Genotyping and sequence analysis revealed that all samples had identical sequences and clustered with genogroup I, and the most closely related well-characterized genotype is Desert Shield. This is the first described food-borne outbreak associated with genogroup I virus in Sweden.

* Corresponding author. Mailing address: Hospital Infection Control Unit, University Hospital of Lund, Lund, Sölvegatan 23, S-223 62 Lund, Sweden. Phone: 046-17 32 72. Fax: 046-18 91 17. E-mail: hugo.johansson{at}skane.se.

Journal of Clinical Microbiology, March 2002, p. 794-798, Vol. 40, No. 3
0095-1137/02/$04.00+0     DOI: 10.1128/JCM.40.3.794-798.2002
Copyright © 2002, American Society for Microbiology. All Rights Reserved.



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