University of Nairobi, College of Health Sciences School of Nursing Sciences P.O. Box 30197, GPO 00100, Nairobi. Tele Fax: 2711250 or Tel. 2726300 Ext. 43390

Contact address Department of Medical Microbiology, University of Nairobi. P.O. Box 19676-00202 Nairobi, Kenya. E-mail: julias.oyugi9@gmail.com