Published in TB and Outbreaks Week, June 17th, 2003
Subtyping determines the strain affiliation of Listeria specimens isolated in the lab. This is critical to epidemiologists tracing outbreaks back to their source, as well as to government and industry efforts to safeguard food supplies through environmental monitoring, disinfection, sanitation and other measures. In the United States, listeriosis sickens an estimated 2500 people annually, and kills 500. Of the bacterium's 13 known strains, serotypes 1/2a, 1/2b and 4b are...
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