Most Minnesotans will never suffer from salmonella, meningitis or tuberculosis. These diseases pop up occasionally but they rarely gain much of a foothold before public health workers reign them in. Monitoring the front line in this war against disease requires constant attention, something the State Public Health Laboratory has been doing for the past 100 years. As the lab marks it's centennial anniversary today Minnesota Public Radio's Lorna Benson has this report on its coming of age.