Sahar O Khalil

Department of Microbiology, University of science and technology, P.O. Box: 30, Omdurman, Sudan

Khalid A Enan

Department of Virology, Central Laboratory, Ministry of science and Technology, P.O. Box 7099, Khartoum

Ali. Y. H

Department of Virology, Veterinary research Institute, P.O. Box 80 67, Khartoum, Sudan

Bashir Salim

Department of Parasitology, Faculty of Veterinary Medicine, University of Khartoum, 13314 Khartoum-North, Sudan

Isam M Elkhidir

Department of Microbiology and Parasitology, Faculty of Medicine, University of Khartoum, Khartoum, Sudan