The statistics of who kills and how they do it often get lost in the arguments over gun control. In the ., where guns are plentiful, men commit more than 90 percent of killings. Their weapon of choice is overwhelmingly a gun. Men kill significant others, individuals they know and strangers more often with guns than any other weapon ( left ). Women also more frequently use guns to kill strangers. Perhaps counterintuitively, women are more likely to kill a significant other or family member using a blunt object, knife, poison or other method. (The numbers here, from FBI data on more than 13,000 killing incidents in the . in 2010, include murders, negligent manslaughters and acts of self-defense but not suicides.)
With an organism like P. aeruginosa , physicians often turn to a class of antibiotics called carbapenems to treat infections. Carbapenems kill P. aeruginosa through a channel or pore in the bacteria’s outer wall made by the protein OprD. That pore lets carbapenems in, which kills the cell. In more than 70% of human infections with carbapenem-resistant strains of P. aeruginosa, the bacterium has stopped making the OprD pore – meaning the killer antibiotic now cannot get inside the cell. We created mutant strains of P. aeruginosa that could not produce the OprD protein, giving them an acquired resistance to carbapenems.