in the laboratory

They were tested on bacteria growing in the laboratory and on mice with pneumonia and sepsis.

And when the researchers took cells in the laboratory and disabled the proteasome they were far easier to infect with bacteria like Salmonella.

In the laboratory, mice tend to avoid open areas in their environments because that is where their situation becomes uncertain, said Dr. Mazen Kheirbek, a neuroscientist at the University of California San Francisco.

In the laboratory, a gene-editing tool called Crispr is used.

It comes almost entirely from experiments on lab mice and rats subjected to doses unlikely to occur in the real world, and to an experiment on human cells also in the laboratory.