Additionally, several microbial communities interact with each other including members of actinobacteria, α, β, γ and ∆ proteobacteria, firmicutes, bacteriodetes and archaea and remain in a continuous layer of exo-polymeric substance (EPS) forming a matrix of microbial network (biofilm).
Recent advances have led to the identification of a number of fibrous proteins that are associated with the extracellular matrices of such microbial communities.
Up-regulation of genes related to two component signal transduction systems and a denitrification enzyme pathway suggest that the B. pseudomallei high biofilm producer is able to sense the surrounding environmental conditions and regulate the production of extracellular polymeric substance matrix, a hallmark of microbial biofilm formation.
Eggs themselves can be viewed as matrices of defense against microbial infection.
Natural polymers such as alginate, chitosan, chitin and cellulose derivatives have been mostly used as the matrix for the immobilization of microbial cells via an entrapment technique (Kumar et al. 2009).
Among the most promising techniques that could be competitive to the current extraction methods of molecules from plant matrices and microbial inactivation of food products, ultrasound assisted supercritical fluid extraction has taken great interest.
This gene is essential in the initiation of the innate immune response and represents a unique pattern-recognition molecule in the extracellular matrix for microbial pathogens.
We estimated the relative contribution of different drivers on these patterns using variation partitioning of microbial beta diversity matrices.
The authors suggest that although the microstructures analyzed are not microfossils, the presence of carbonaceous material in the surrounding matrix is consistent with the existence of microbial life at the time and with evidence of early Archaean life found at other sites.
Since then, many authors have underlined the importance of microbial surveillance of environmental matrices [ 1, 2, 5, 13- 15].
