Raji, M., U. Minga, and R. Machang'u. “Prevalence and Characterization of Verotocytoxin Producing <i>Escherichia coli</I> O157 from Diarrhoea Patients in Morogoro, Tanzania”. Tanzania Journal of Health Research, vol. 10, no. 3, Sept. 2008, pp. 151-8, doi:10.4314/thrb.v10i3.14355.