Extracellular DNA in single- and multiple-species unsaturated biofilms

Article Abstract:

The compositional similarity of extracellular DNA (eDNA) to cellular DNA, the relative quantity of eDNA, and the terminal restriction fragment length polymorphism (TRFLP) community profile of eDNA in multiple-species biofilms is investigated. It is concluded that extracellular DNA production in unsaturated biofilms is species dependent and that the phylogenetic information contained in this DNA pool is quantifiable and distinct from either total to cellular DNA

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Persistence of Streptococcus mutans in stationary-phase batch cultures and biofilms

Article Abstract:

Characterization of the survival of Streptococcus mutants UA159 in both batch cultures and biofilms is discussed. Findings reveal that the presence of mucin prolongs the survival of S. mutans in sugar-starved biofilms and it is suggested that further characterization of the effect of mucin on S. mutans persistence may lead to a better understanding of the biological state of the bacteria in a mature biofilm.

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In vitro laser ablation of natural marine biofilms

Article Abstract:

The efficiency of pulsed low-power laser irradiation of 532 nm from an Nd:YAG laser is studied to remove marine biofilm developed on titanium and glass coupons. The impact is summarized with emphasis on the bacterial and diatom components of the natural biofilms.

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