Affiliation: | 1. Mycoplasma Department, Veterinary Research Administration, El Amarat, P.O. Box 8067, Khartoum, (Sudan) 2. Microbiology Department, Veterinary Faculty, University of Khartoum, P.O. Box 32, Khartoum North, (Sudan) 3. Lessing Kolleg Marbacher, Weg 18, 3550, Marburg 1L, West Germany
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