Listeria Symptoms: CDC: Listeria Outbreak Deadliest in a Decade

Symptoms can take longer to appear, putting victims at greater risk of illness. "We believe that it is connected based on patient history and presence of listeria; however we do not yet have molecular lab confirmation for the specific outbreak strainsWilliams: The incubation period with listeriosis is tremendously long. Symptoms can occur anywhere from three to 70 days after exposure, which is what makes these cases so difficult to solve. The listeria-contaminated cantaloupe from Jensen

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