Table 2.

Fiber optic biosensors for bacteria detection.

Sensor Type	Sensitivity of the Sensor [nm/RIU]	Type of Detected Bacteria	Range of the Detection [CFU/mL]	Surface Functionalization	Receptor	Ref
DIRECT METHODS
Chirped-LPG	-	E. coli	10–60 CFU/mL	APTES+EDC	Ab	[65]
LPG	7200	E. coli	103 CFU/mL	APTES+PDITC	APMAN	[58]
2 LPG	1929	E. coli	102–105 CFU/mL	APTES + GLU	T4 phages	[66]
LPG	570	E. coli	108 CFU/mL	-	T4 phages	[45]
LPG	-	E. coli	100 CFU/mL	APTES+GLU	MS2 phages	[47]
LPG	-	S. aureus	104–108 CFU/mL	ISAM ([PAH/PAA]10PAH)	Ab	[56]
LPG	-	S. aureus	102–106 CFU/mL	ISAM (PCBS)	Ab	[55]
LPG	2600	E. coli	100 µg/mL	GPTMS+Ni + His-Tag	adhesin gp37	[50]
LPG	3000	E. coli	100 µg/mL	GPTMS +Ni + His-Tag	adhesin gp37	[51]
LPG	2321	E. coli	103–109 CFU/mL	APTES+GLU	T4 phages	[46]
LPG	11,000	E. coli	103–109 CFU/mL	TESPSA+Ni + His-Tag	gp37	[52]
µIMZI	15,000	E. coli	102–108 CFU/mL	APTES+GLU	MS2 phages	[63]
INDIRECT METHODS
LPG	6947.4	LPS E. coli B	0.2 mg/mL	GPTMS+Ni + His-Tag	adhesin gp37	[59]
LPG	2600	LPS E. coli B	0.2 mg/mL	GPTMS+Ni + His-Tag	adhesin gp37	[67]
LPG	150	OMPs E. coli	0.1–10 nM	ISAM (PLL) APTES	DNA aptamer	[63]