IspH (LytB) is the last enzyme in the nonmevalonate pathway. The IspH domains can be fused to either the ribosomal protein S1 (RPS1), IspH–RPS1 binds to mRNA or forms part of the bacterial ribosome [1] [2]. IspH–RPS1 proteins are present in anaerobes found in the human gut and some, such as Clostridium botulinum, C. tetani and Fusobacterium nucleatum, are pathogens [2]. IspH inhibitor will therefore kill bacteria directly, as with other antibiotics, but will also kill persistent bacteria by microptosis [3].