Multiple choice

Bacteria whose pores are used to test the efficacy of moist heat sterilization is __________.

  1. clostridium tetani

  2. streptococcus faecalis

  3. bacillus stearothermophillus

  4. ureaplasma urealyticum

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Bacillus stearo thermophilus is thermophilic and its spores are killed by an exposure of compressed steam for 12 minutes at 1210C; therefore, its spores are used to test the efficacy of moist heat sterilization (autoclave). Other means to test efficacy of moist heat sterilization are chemical indicators, autoclave tapes and thermocouples.