Waihenya, R., Mtambo, M. and Nkwengulila, G. 2003. Antibody and Interleukin-6 Response in Local Chickens Infected with Salmonella gallinarum and Treated with Crude Extract of Aloe Secundiflora. Tanzania Veterinary Journal. 22, 2 (Jun. 2003), 94–101.