AGRI 224 Lecture Notes - Lecture 11: Listeria Monocytogenes, Raw Milk, Listeriosis

• School: University of Delaware
• Department: Agriculture
• Course: AGRI 224
• Professor: Aresenault

Document Summary

Has nothing to do with free range, grass fed, antibiotic free, hormone free, or non-industrial production. Listeria monocytogenes is a small, motile, gram-positive, non-spore forming, extremely resistant, diphtheroid coccobacillus that grows under a wide temperature range 4 44 c. Listeriosis is primarily a winter-spring disease of feedlot or housed ruminants. The less acidic ph of spoiled silage enhances multiplication of l monocytogenes. A person with listeriosis usually has fever and muscle aches, often preceded by diarrhea or other gastrointestinal symptoms. Almost everyone who is diagnosed with listeriosis has invasive infection (meaning that the bacteria spread from their intestines to their blood stream or other body sites). Disease may occur as much as two months after eating contaminated food. Pregnant women: pregnant women typically experience only a mild, flu-like illness. However, infections during pregnancy can lead to miscarriage, stillbirth, premature delivery, or life-threatening infection of the newborn.