PMID: 6398178Jan 1, 1984Paper

New perspectives on the gastrointestinal mode of transmission in invasive Listeria monocytogenes infection

Clinical and Investigative Medicine. Médecine Clinique Et Experimentale
W F Schlech

Abstract

The route or mechanism of transmission of Listeria monocytogenes from its rural veterinary reservoir to newborn and older human populations has been obscure. Anecdotal reports of milk-borne infection from cows with Listeria mastitis have been published, but intensive investigations of small outbreaks of L. monocytogenes infections in humans have not supported a gastrointestinal mode of infection. Several recent studies, however, strongly suggest this possibility, and case-control studies of epidemic listeriosis in the Canadian Maritime provinces in 1981 documented an association between ingestion of uncooked vegetables and the development of illness (p = 0.02). In that study, coleslaw from a regional producer which was distributed throughout the Maritimes was considered to be the vehicle of transmission. Cabbage, the raw product in the production of coleslaw, was contaminated at a farm prior to arrival at the plant. Contamination occurred through fertilization with raw manure from a flock of sheep known to harbour L. monocytogenes. Therefore, an indirect link was established between Listeria monocytogenes infection of sheep on a cabbage farm and subsequent development of invasive listeriosis in humans. This study supports findi...Continue Reading

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