Anaerobic sulfide oxidation with nitrate by a freshwater Beggiatoa enrichment culture

Article Abstract:

A lithotrophic freshwater Beggiatoa strain was enriched in [O.sub.2]-[H.sub.2]S gradient tubes for investigating its ability to oxidize sulfide with N[O.sup.3][.sup.-] as an alternative electron acceptor. The more [NO.sub.3][.sup.-] that was added to the agar, the deeper the Beggiatoa filaments glided into anoxic agar layers, suggesting that the Beggiatoa sp. used [NO.sub.3][.sup.-] to oxidize sulfide at depths below the depth that [O.sub.2] penetrated.

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Competitive fitness of Listeria monocytogenes serotype 1/2a and 4b strains in mixed cultures with and without food in the U.S. Food and Drug Administration enrichment protocol

Article Abstract:

The comparison of three strains of L. monocytogenes serotype 4b and five strains of serotype 1/2a in direct competition with each other in two-strain mixed cultures is presented by using the food and drug administration (FDA) bacterial analytical manual (BAM) enrichment protocol. It was observed that the differences in strain fitness that occurred were not attributable to serotype or genetic lineage.

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Microbial ecology of the soppresasata of Vallo di Diano, a traditional dry fermented sausage from southern Italy, and in vitro and in situ selection of autochthonous starter cultures

Article Abstract:

Several culture-dependent and culture-independent approaches are employed to study the microbial ecology of 'soppresasata of Vallo di Diano', a traditional dry fermented sausage from southern Italy. The in situ evaluation of the autochthonous starter cultures is found to be much better than the in vitro selection.

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