[1] Lithuanian Vet Acad, Dept Infect Dis, LT-47181 Kaunas, Lithuania
[2] Univ Hosp TB & Infect Dis, Vilnius, Lithuania
[3] Santariskiu Clin, Vilnius, Lithuania
[4] Univ Zurich, Inst Parasitol, CH-8057 Zurich, Switzerland
[5] Food & Agr Org, Rome, Italy