Review Article

Nanomaterials Based Monitoring of Food- and Water-Borne Pathogens

Table 2

Detection methods and limits of detection of water-borne pathogens.

MethodAdvantagesLimitationsDetection limitsReference

Standard PCRHigher specificity, highly sensitive,
and automated systems
Need DNA extraction, interface of inhibitors,
and can detect all cells
Present[23, 24]
Multiplexed PCRSensitive, highly specific, and can detect multiple pathogens in one reaction
with automation
Needs more specific primer designs, interface of inhibitors, and detects all type of pathogensPresent[25, 26]
Real-time PCRHighly sensitive, specific, rapid, reliable, and reproductive
results with specific
time course detection
Most costly, interface of inhibitors, and detects all type of pathogens. Needs a trained technician and false results due to cross-contaminationsPresent[27ā€“29]
DNA microarrayHighly sensitive, specific, high-throughput screening for multiple detection is possibleCost is high, needs trained technician and needs oligonucleotide probes and complicated
detection systems
Present[14, 30, 31]
Fluorescent in situ hybridization (FISH)High selectivity can differentiate viable
and nonviable cells
Low sensitivity requires preenrichment and concentration steps for sample processing false-negative results possible high costPresent[17, 32]
Next generation sequencing. (NGS)More specific and higher sensitive, can even characterize the pathogens in
biofilm forming infections
Needs DNA extraction procedures, high cost,
and complex computing analysis
Present[33ā€“35]
Immunological techniquesHighly specific and multiple samples can be analyzedLess sensitive, cross reactivity for high possibility of false results and labelling proceduresPresent[36, 37]