Since its first use in Microbial Ecology research in the early 90s
(Muyzer et al., 1993), DGGE analysis of rRNA-encoding genes amplified
by PCR (PCR-DGGE) has become awidely used tool for investigating the
microbial diversity of food ecosystems, including milk, cheese and other
dairy products [for recent reviews see Cocolin et al. (2013) and Quigley
et al. (2011)].