Update: Multinational listeriosis outbreak due to ‘Quargel’, a sour milk curd cheese, caused by two different L. monocytogenes serotype 1/2a strains, 2009-2010

R Fretz; J Pichler; U Sagel; P Much; W Ruppitsch; A T Pietzka; A Stöger; S Huhulescu; S Heuberger; G Appl; D Werber; K Stark; R Prager; A Flieger; R Karpíšková; G Pfaff; F Allerberger

doi:10.2807/ese.15.16.19543-en

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Update: Multinational listeriosis outbreak due to ‘Quargel’, a sour milk curd cheese, caused by two different L. monocytogenes serotype 1/2a strains, 2009-2010
R Fretz¹ , J Pichler¹ , U Sagel^1,2 , P Much¹ , W Ruppitsch¹ , A T Pietzka¹ , A Stöger¹ , S Huhulescu¹ , S Heuberger¹ , G Appl¹ , D Werber³ , K Stark³ , R Prager³ , A Flieger³ , R Karpíšková⁴ , G Pfaff ⁵ , F Allerberger¹
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Affiliations: ¹ Austrian Agency for Health and Food Safety (AGES), Vienna, Austria ² Binational Consiliar Laboratory for Listeria, Germany and Austria, Vienna, Austria ³ Robert Koch Institute (RKI), Berlin and Wernigerode, Germany ⁴ National Institute of Public Health, Prague, Czech Republic ⁵ State Health Office (LGA) Baden-Württemberg, Stuttgart, Germany

Correspondence:
R Fretz
rainer.fretz ages.at
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Citation style for this article: Fretz R, Pichler J, Sagel U, Much P, Ruppitsch W, Pietzka A T, Stöger A, Huhulescu S, Heuberger S, Appl G, Werber D, Stark K, Prager R, Flieger A, Karpíšková R, Pfaff G, Allerberger F. Update: Multinational listeriosis outbreak due to ‘Quargel’, a sour milk curd cheese, caused by two different L. monocytogenes serotype 1/2a strains, 2009-2010 . Euro Surveill. 2010;15(16):pii=19543. https://doi.org/10.2807/ese.15.16.19543-en Received: 20 Apr 2010

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Abstract

We previously reported an outbreak of listeriosis in Austria and Germany due to consumption of 'Quargel' cheese. It comprised 14 cases (including five fatalities) infected by a serotype 1/2a Listeria monocytogenes (clone 1), with onset of illness from June 2009 to January 2010. A second strain of L. monocytogenes serotype 1/2a (clone 2) spread by this product could be linked to further 13 cases in Austria (two fatal), six in Germany (one fatal) and one case in the Czech Republic, with onset of disease from December 2009 to end of February 2010. .