Harley, John P. Department of Biological Sciences, Eastern Kentucky University, Richmond, Kentucky.
Last reviewed:May 2016
Show previous versions
- Life cycle
- Prevention and control
- Links to Primary Literature
- Additional Readings
A parasitic disease caused by a roundworm typically found in raccoons that is transmissible to humans, other mammals, and birds. Baylisascaris procyonis is a parasitic roundworm of raccoons (Procyon lotor) and belongs to the order Ascaridida in the phylum Nematoda (Nemata). This large parasite, which is commonly termed raccoon roundworm, is responsible for the disease baylisascariasis in animals and humans. The disease is manifested by severe or fatal visceral larval migrans, ocular larval migrans, and neurological disease (neurological larval migrans) in both animals and humans. Larval migrans is defined as the prolonged migration and persistence of helminth larvae in the organs and tissues of animals or humans. This infection is considered by the Centers for Disease Control and Prevention as an emerging zoonosis (a disease of animals that is transmissible to humans) in the United States. It was first reported in the United States in 1931 from a raccoon in the New York Zoological Park (now known as the Bronx Zoo). The infection appears to be common in raccoons across the United States, including California, the Midwest, the Northeast region, the Middle Atlantic region, and the mountainous areas of the southeastern states. The first human case was reported in 1984 in a 10-month-old child in Pennsylvania. At least 16 severe cases (including 6 fatalities) have been reported and well documented in humans. The prevalence of subclinical cases is unknown. See also: Ascaridida; Infection; Nemata (Nematoda); Parasitology; Raccoon; Zoonoses
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. Its dedicated editorial team is led by Sagan Award winner John Rennie. Contributors include more than 9000 highly qualified scientists and 39 Nobel Prize winners.
MORE THAN 8500 articles and Research Reviews 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 17,000 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