Tick-borne encephalitis transmitted by unpasteurised cow milk in western Hungary, September to October 2011

S Caini; K Szomor; E Ferenczi; Á Székelyné Gáspár; Á Csohán; K Krisztalovics; Z Molnár; J K Horváth

doi:10.2807/ese.17.12.20128-en

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Tick-borne encephalitis transmitted by unpasteurised cow milk in western Hungary, September to October 2011
S Caini^1,2 , K Szomor³ , E Ferenczi³ , Á Székelyné Gáspár⁴ , Á Csohán² , K Krisztalovics² , Z Molnár² , J K Horváth²
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Affiliations: ¹ European Programme for Intervention Epidemiology Training (EPIET), European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden ² Department of Infectious Disease Epidemiology, National Center for Epidemiology, Budapest, Hungary ³ National Reference Laboratory for Viral Zoonoses, National Center for Epidemiology, Budapest, Hungary ⁴ Körmendi, Őriszentpéteri, Szentgotthárdi, Vasvári Public Health Institute Service; Policy administration service of public health, Vas County Government Office, Körmend, Hungary

Correspondence:
J Horváth
horvath.krisztina oek.antsz.hu
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Citation style for this article: Caini S, Szomor K, Ferenczi E, Székelyné Gáspár Á, Csohán Á, Krisztalovics K, Molnár Z, Horváth J K. Tick-borne encephalitis transmitted by unpasteurised cow milk in western Hungary, September to October 2011. Euro Surveill. 2012;17(12):pii=20128. https://doi.org/10.2807/ese.17.12.20128-en Received: 02 Mar 2012

Abstract

In October 2011, a cluster of four tick-borne encephalitis (TBE) cases was identified in Hungary. Initial investigations revealed a possible link with consumption of unpasteurised cow milk sold by a farmer without authorisation. We performed a cohort study including all regular customers of the farmer. Overall, eleven cases (seven confirmed and four suspected) were identified. Customers who had consumed the farmer's unpasteurised cow milk had more than a two-fold increased risk for being a TBE case, although not at statistically significant level.