In this short review article, we discuss the significant progresses, which have been made in bacterial entrapment techniques over the past decade. Recently, the biocompatibility of conducting polymers as well as the straightforwardness in their preparation has focused more attention on this technique. The key feature of the technique is that bacteria-doped films can be prepared by a single-step electrochemical polymerization, due to the negative surface charges carried by bacteria. We have also included the results of a literature survey on bacterial imprinted polymers, which possess cavities complementary to the imprinted bacteria. Sensory devices using these polymer films will provide a new technology for FIA detectors.