SECONDARY PEST EXPERIMENT, 1999

Primary and secondary syphilis--United States, 1999.

In October 1999, CDC, in collaboration with other federal partners, launched the National Plan to Eliminate Syphilis in the United States. In 1998, Congress initiated funding for the syphilis elimination effort. Syphilis elimination is defined as the absence of sustained transmission (i.e., no transmission after 90 days of the report of an imported index case). The national goal for syphilis el...

Secondary Metabolites and Pest Resistance in a Tropical Forage Legume

Evaluating the risks of biotype evolution and secondary pest outbreak

ontrol of insect pests has often been suggested as a promising use of the emerging gene-insertion technology. The most commonly proposed strategies would improve microbial pathogens of insects, incorporate defects into pest populations, and transfer genes that encode for insect-resistance properties into plants. Although some advantages and risks of these strategies have been discussed in gener...

Escherichia coli O157 Infection and Secondary Spread, Scotland, 1999–2008

To determine the proportion of Escherichia coli O157 cases in Scotland attributable to secondary spread, we analyzed data obtained through entire-population enhanced surveillance. We identified 11% of cases as secondary. Secondary cases in single households were younger than secondary cases in outbreaks affecting >1 household and had similar risk for hemolytic uremic syndrome.

Comparison of Secondary Electron Emission simulation to experiment

The secondary electron emission (SEE) yields were calculated for various materials and a good comparison has been obtained with the experimental data for gold measured at ANL. The calculation method uses Monte Carlo simulation, empirical theories, and close comparison to experiment, in order to parameterize the SEE yields of highly emissive materials for microchannel plates. The simulation resu...