Moist heat kills of the following except-

Ans. is 'd' i.e., Coxiella Burnetti . Heat sterlization is done either by dry heat or by moist heat. . Pasteurisation is a type of sterilization by moist heat. . Pasteurisation is done by two methods. a) Holder method 63degC for 30 minutes b) Flash method 72degC for 15-20 seconds . All nonsporing pathogens such as mycobacteria, brucella and salmonellae are destroyed. Coxiella burnetii is relatively heat resistant and may survive the holder method. Note : The best answer of this question would have been none of the above, as pasteurization is not the only method of moist heat sterilization. Autoclaving is also a type of moist heat sterilization, and it kills all the microorganisms.