Extracellular Matrix
This is an
SEM micrograph of an extracellular
matrix forming around a cocci type bacterial infection. The bacteria in
the left portion of the micrograph are almost completely encapsulated
with the matrix. In other regions, the matrix is holding the bacteria
together, but has not yet completely encapsulated them. The matrix is
made of an excretion from the bacteria. The matrix is composed of a
polymeric compound called extracellular polymeric substance (EPS).
Bacteria in such a matrix behave very differently from free floating
bacteria. It is believed that the matrix allows communication between
the individual bacterium. The protective matrix can make the colony more
resistant to antibacterial agents and antibiotics. The bacteria are
about 1 micron
in size. |