Surface phenotypic characteristics and virulence of spanish isolates of Aeromonas salmonicida after passage through fish

Article Abstract:

The virulence and surface characters such as proteins and hydrophobic property of the bacteria changed when Aeromonas salmonicida strains were passed through rainbow trouts' tissues. All the strains were not virulent, but all contained the repeating subunit of the O-antigen side chain of the bacterial lipopolysaccharide and the 50-kDa A protein in their cell envelope. Autoaggregation and agglutination of yeast cells was seen in all the strains. However, these, in vitro tests, cannot accurately determine the virulence of Aeromonas in vivo.

Diseases, Virulence (Microbiology), Salmonidae, Salmoniformes

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Functional Tn5393-like transposon in the R plasmid pRAS2 from the fish pathogen Aeromonas salmonicida subspecies salmonicida isolated in Norway

Article Abstract:

Researchers have discovered the strA-strB antibiotic resistance genes on a Tn5393-like transposon on the pRAS2 plasmid in a fish pathogen in Norway. The plasmid confers resistance to streptomycin, sulfonamides, and tetracycline. This is the first time it has been found in a non-agricultural setting.

Genetic aspects, Drug resistance in microorganisms, Microbial drug resistance

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A mariner-based transposition system for Listeria monocytogenes

Article Abstract:

A new marine-based transposition system is developed for Listeria monocytogenes. This system has a high rate of transposition and a low rate of plasmid retention and transposition is very random, thus creating it an ideal tool for high-throughput transposon mutagenesis in Listeria monocytogenes.

Science & research, Listeria monocytogenes

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