Norwalk Virus–specific Binding to Oyster Digestive Tissues
Françoise S. Le Guyader* , Fabienne Loisy*, Robert L. Atmar†, Anne M. Hutson†, Mary K. Estes†, Nathalie Ruvoën-Clouet‡§¶, Monique Pommepuy*, and Jacques Le Pendu§¶
Author affiliations: *Institut Français de Recherche pour l'Exploitation de la Mer, Nantes, France; †Baylor College of Medicine, Houston, Texas, USA; ‡Ecole Nationale Vétérinaire, Nantes, France; §Institut National de la Santé et de la Recherche Médicale, Nantes, France; ¶Université de Nantes, Nantes, France
Figure. Immunohistochemical detection of Norwalk viruslike particles (VLPs) in oyster digestive tissue. A) VLPs in the digestive diverticulum 12 h after seeding sea water with 109 particles. The arrows show immunoreactivity detected in intraepithelial cells. B) VLPs in the digestive diverticulum 12 h after seeding sea water with 1012 particles. The arrowhead shows immunoreactivity in a phagocyte located in connective tissue, and the arrow shows immunoreactivity in the lumen of a digestive tubule. C) Attachment of recombinant VLPs to secondary ducts of the digestive diverticula after incubation on tissue sections. The arrows show immunoreactivity in the lumen of ducts. D) Attachment of Norwalk virus to a main digestive duct. The arrow shows immunoreactivity in epithelial duct cells. E and F) Attachment (arrows) of recombinant VLPs to digestive ducts without (E) or with (F) periodate treatment of serial tissue sections. G) Binding of VLPs (arrows) to a main digestive duct of VLPs from the H331A mutant capsid protein. H) Lack of binding of the H329A mutant. I) Binding of HPA lectin to the digestive diverticula. Scale bars: A and B, 10 μm; C, E, F, and H, 40 μm; D, G, and I, 20 μm.
The opinions expressed by authors contributing to this journal do not necessarily reflect the opinions of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.