1Present address: Dept. of Pathology, N.T.R College of Veterinary Science, Gannavaram, A.P.;
2Department of Pathology, School of Veterinary Medicine, 30559, Hannover, Germany;
3Tierarztliche Klinik, Grosse Strasse 101, D-28870, Ottersberg, Germany.
4Department of Pathology, School of Veterinary Medicine, Hannover, Germany
