Table 1. Performance comparison between biosensors for the Detection of E. coli O157:H7.

Type	LOD (CFU/ml)	Visible to the naked eyes	Enrichment or DNA extraction	Molecular recognition component	Ref
microelectrode array biosensor	107	No	No	antibody	[10]
electrochemical impedance immunosensor	106	No	No	antibody	[12]
SPR immunosensor	3.0 × 104	No	No	antibody	[15]
Chemiluminescence microarray readout system	104	No	No	antibody	[11]
piezoelectric immunosensor	103	No	No	antibody	[13]
SAM based SPR biosensor	103	No	No	antibody	[14]
waveguide biosensor	103	No	Yes	antibody	[16]
QCM DNA sensor	2.67×102	No	Yes	oligonucleotide	[17]
PDA-based aptasensor	104	Yes	No	oligonucleotide	This study