A virus isolated in 1952 from Rhipicephalus sanguineus collected on sheep in Sudan has been designated “Wad Medani” (Ar 492). It is pathogenic to infant mice and may be propagated by parenteral inoculation in both hard and soft ticks. It therefore appears to qualify as an arbovirus.
Present address: School of Public Health, Earl Warren Hall, University of California, Berkeley, California 94720.
Present address: U. S. Naval Medical Research Unit No. 3, c/o American Embassy, Cairo, Egypt.
Present address: Naval Medical Research Institute, Virus and Rickettsial Diseases, Bethesda, Maryland.