ABSTRACT
A biosensor is an analytical device incorporating a biolo-
gical or a biologically derived sensing element, either
integrated within or intimately associated with a physico-
chemical transducer. The different types of biosensors,
transducers, surface chemistries, their principles and appli-
cations have been reviewed in detail.[1-3] Application of a
specific biosensor principle for detection is task specific.
Complex media such as food, blood, serum, urine, and
fermentation broths have been tested often with minimum
sample treatment. This entry attempts to review the con-
cepts related to the development of a diverse set of biosen-
sors for the detection of foodborne pathogens and the
challenges in testing complex food systems.
