The sporicidal power of four disinfectants (formalin, chlorinated lime, lysol and active iodine) were tested against Cl.chauvoei and Cl.septicum spores.
The most effective was formalin then chlorinated lime and lastly active iodine; lysol had no effect. It was found that 5% formalin had an excellent bactericidal effect on both organi sms. It disinfect soil contaminated with Cl.septicum spores after 4 hours exposure; while it destroyed Cl.chauvoei spores after 18 hours exposure.
Chlorinated lime containing 5% available chlorine was effecient for killing both organisms within 24 hours. Active iodine 1/30 concentration, required two applications with one hour interval to destroy the spores of Cl.chauvoei and Cl.septicum during 72 and 96 hours respectively.