[The outbreak of an epidemic of tick-borne encephalitis in Kielec province induced by milk ingestion].

Outbreak of tick-borne encephalitis (TBE) was reported between May 14 and June 20 1995 in Busko Zdrój in Kielce Province. Drinking fresh (unboiled) goat's milk from private breeding was probable reason of the outbreak. 63 person drank goat's milk from the same source; 15 were hospitalized with neurological symptoms, 33 persons had an influenza-like symptoms and were treated in out-patient department (27) or healed spontaneously (6), and 15 persons were healthy. TBE virus antibodies were found in CSF of all 15 persons with neuroinfection syndromes. IgM and IgG against TBE virus were present in sera of 15 hospitalized patients and 20 patients with influenza like-syndromes. Antibodies to TBE virus were detected in serum of one of 19 goats from the breeding farm confirming the source of TBE virus infection.