Salmonella testing in meat faster than ever

With all the recent food poisoning scares and recalls in the news lately I'm not exactly sure where this bit of news fits in, but a new test has been developed that allows for much faster detection of salmonella in meat. Obviously when it comes to perishables like meat, the faster the fresher so that's definitely a good thing. But on the other hand although this new test is faster it's not necessarily better. The results from the new test were "comparable" to the old methods, just quicker. Currently it takes as long as 5 days (why so long?) compared to only 12 hours if they switch to this new method.