Kashi ( itace abu karfi ko taushi na sauran abinci wadanda jiki bazai iya narkarwa ba dan amfani dashi wa jikin, amma ƙwayoyin cuta sun lalata shi act babban hanji. Tortora, Gerard J.; Anagnostakos, Nicholas P. (1987). Principles of anatomy and physiology (Fifth ed.). New York: Harper & Row, Publishers. p. 624. ISBN 978-0-06-350729-6. Diem, K.; Lentner, C. (1970). "Faeces". in: Scientific Tables (Seventh ed.). Basle, Switzerland: CIBA-GEIGY Ltd. pp. 657–60.