Microbiology Elek’s gel precipitation test is used for detecting of toxins of which of the following organism? A Corynebacterium diphtheriae B Neisseria meningitidis C Streptococcus pneumoniae D All the above 💡 Explanation Elek's gel precipitation test is used for detecting of toxins of which of the following organism? ✓ Correct Answer: A. Corynebacterium diphtheriae