Gronstol, Hallstein Department of Large Animal Clinical Sciences, Norwegian College of Veterinary Medicine, Oslo, Norway.
- Virulence and pathogenesis
- Clinical symptoms
- Related Primary Literature
- Additional Reading
An infectious disease of humans and animals caused by the bacteria Listeria monocytogenes and Listeria ivanovii. Listeriosis is a serious infection. Both humans and animals can be carriers of the pathogenic forms of Listeria, which are excreted in the feces of the carriers. Ruminants such as sheep, goats, and cattle can excrete the bacteria in milk, without clinical symptoms of mastitis. The most important pathway of infection is probably through food. Listeria monocytogenes has frequently been isolated from grass silage (fermented fodder), especially from silage of inferior quality, which is an important source of infection in ruminants. Relatively few animals develop clinical disease, but a high proportion can be latent carriers. Farm leys (pastures) often are fertilized with manure, and the bacteria in infected manure may be distributed on plants and in soil. During forage harvesting, soil and dung may be brought into the silo together with the grass, thus introducing the bacteria into the silage. Listeria monocytogenes is able to multiply in silage with a high pH, which probably is the main source of infection in ruminants. Infection with L. ivanovii typically occurs only in ruminants and is extremely rare in humans. See also: Bacteria; Bacterial growth; Bacteriology; Medical bacteriology; Pathogen
The content above is only an excerpt.
for your institution. Subscribe
To learn more about subscribing to AccessScience, or to request a no-risk trial of this award-winning scientific reference for your institution, fill in your information and a member of our Sales Team will contact you as soon as possible.
to your librarian. Recommend
Let your librarian know about the award-winning gateway to the most trustworthy and accurate scientific information.
AccessScience provides the most accurate and trustworthy scientific information available.
Recognized as an award-winning gateway to scientific knowledge, AccessScience is an amazing online resource that contains high-quality reference material written specifically for students. Contributors include more than 10,000 highly qualified scientists and 46 Nobel Prize winners.
MORE THAN 8700 articles covering all major scientific disciplines and encompassing the McGraw-Hill Encyclopedia of Science & Technology and McGraw-Hill Yearbook of Science & Technology
115,000-PLUS definitions from the McGraw-Hill Dictionary of Scientific and Technical Terms
3000 biographies of notable scientific figures
MORE THAN 19,000 downloadable images and animations illustrating key topics
ENGAGING VIDEOS highlighting the life and work of award-winning scientists
SUGGESTIONS FOR FURTHER STUDY and additional readings to guide students to deeper understanding and research
LINKS TO CITABLE LITERATURE help students expand their knowledge using primary sources of information