Conventional methods
are usually inexpensive and simple but these methods can be
time consuming as they depend on the ability of the microorganisms
to grow in different culture media such as pre-enrichment
media, selective enrichment media and selective plating media.
Usually conventional methods require 2 to 3 days for preliminary
identification and more than a week for confirmation of the
species of the pathogens (Zhao et al., 2014). Conventional methods
are laborious as they require the preparation of culture media,
inoculation of plates and colony counting (Mandal et al., 2011).
Furthermore, conventional methods may be limited by their low
sensitivity (Lee et al., 2014). False negative results may occur due
to viable but non-culturable (VBNC) pathogens. The failure to
detect foodborne pathogens would increase the transmission risk
of pathogens