Comparison of Five Guaiac Resin Paper Tests for Demonstrating the Presence of Blood in Faeces

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Abstract
Four recently available kits of guaiac resin‐impregnated paper for demonstrating the presence of blood in faeces were compared with Hemoccult II® in in vitro testing. Hemo‐FEC® most closely resembled Hemoccult II® in its sensitivity with freshly prepared kits and kits prepared one week earlier with or without rehydration before testing. Gamma Fe‐Cult and Fecatest® were more sensitive than Hemoccult II® whereas Camco‐Pac® Guaiac was much less sensitive. Rehydration of kits prepared several days beforehand appears to be useful in restoring sensitivity lost by all the kits tested.