Virulent infections are expected to impair learning ability, either as a direct consequence of stressed physiological state or as an adaptive response that minimizes diversion of energy from immune defense. This prediction has been well supported for mammals and bees. Here, we report an opposite result in Drosophila melanogaster. Using an odor-mechanical shock conditioning paradigm, we found th...

Erwinia carotovora subsp. atroseptica (Van Hall) (Eca), Erwinia carotovora subsp. carotovora (Dye) (Ecc), Erwinia chrysanthemi (Burkholder) (Ech) are pathogenic bacterias of potato crop, causing blackleg of stems in the field and soft rot of tubers in storage. During these last years, an outbreak of soft rot potatoes caused by the 3 Erwinia species has been observed in Belgium. Several methods ...

The lipopolysaccharide of Erwinia carotovora was analyzed by quantitative sugar analysis, methylation analysis, and chromic oxide oxidation. This led to the following structure of the core oligosaccharide: (Formula; see text).

The present study investigates antibacterial activity of tobacco extracts from Nicotiana tabacum at different concentrations in different polar solvents. Six different extracts were prepared, using 5 different polar solvents viz., Ethanol, Ethyl acetate, n-Hexane, Acetone, Butanol and water. Four different concentrations (6, 12, 18 and 24 mg of sample disc) of each extract were subjected for pr...

Chlorine dioxide (ClO2) is an antimicrobial agent recognized for its disinfectant properties. In this study, the sanitizing effects of ClO2 solutions against Salmonella enterica and Erwinia carotovora in water, on tomato surfaces, and between loads of tomatoes were evaluated. In water, ClO2 at 5, 10, and 20 ppm caused a > or = 5-log reduction of S. enterica within 6, 4, and 2 s, respectively. H...

Pectobacterium wasabiae, originally causing soft rot disease in horseradish in Japan, was recently found to cause blackleg-like symptoms on potato in the United States, Canada, and Europe. A draft genome sequence of a Canadian potato isolate of P. wasabiae CFIA1002 will enhance the characterization of its pathogenicity and host specificity features.

Polymerase chain reaction denaturing gradient gel electrophoresis (PCR-DGGE), and a culturedependent technique were used to study the diversity of the intestinal bacterial community in adult Dastarcus helophoroides (Fairmaire) (Coleoptera: Bothrideridae). Universal bacterial primers targeting 200 bp regions of the 16S rDNA gene were used in the PCR-DGGE assay, and 14 bright bands were obtained....