Rhamnolipids on larvae: a potential weapon against resistance selection.

The resistance of to chemical insecticides has been reported and our work proposes the use of biosurfactants as an alternative larvicide. We evaluated the effect of rhamnolipids against larvae of pyrethroid-resistant and susceptible strains. Time-mortality and sublethal effects were evaluated via survival analysis and swimming behavior, respectively.

Hydrocarbonoclastic bacterial species growing on hexadecane: Implications for bioaugmentation in marine ecosystems.

of bioaugmentation strategies are an obstacle for damage mitigation caused by oil spills in marine environments. Cells added to the contaminated sites are quickly lost by low adherence to the contaminants, rendering ineffective. This study used two hydrocarbonoclastic species - Rhodococcus rhodochrous TRN7 and Nocardia farcinica TRH1 cells - growing in mineral medium containing hexadecane to evaluate cell distribution in a crude-oil contaminated marine water.

TR47II as a source of bioactive lipopeptides against Gram-negative pathogens causing nosocomial infections.

This study aimed to investigate the antimicrobial, antibiofilm, and cytotoxic effects of biosurfactant lipopeptides synthesized by TR47II. For this purpose, the lipopeptides were partially purified using a three-step process and characterized. In the first step, the crude extract obtained from acid precipitation exhibited strong antibacterial activity against the Gram-negative opportunistic pathogens ATCC 8750, ATCC 13138, ATCC 14909, and ATCC 15175.

The draft genome of TRPF4, a bacteriocin producer with potent activity against the causative agent of Legionnaires' Disease.

In this work, we present the draft genome sequence of strain TRPF4 consisting of 2,634,550 bp with a G + C content of 32.4%. The genome sequence includes 2466 protein-coding genes, 11 rRNAs and 62 tRNAs, in 33 contigs.