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Open Access Bovine Colostral Antibody Against Verotoxin 2 Derived from Escherichia coli O157:H7: Resistance to Proteases and Effects in Beagle Dogs

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A bovine colostral antibody against verotoxin (VT) 2 of Escherichia coli O157:H7 was administered orally to beagle dogs. The antibody remained in the dogs' small intestine for at least 2 h, whereas little serum antibody remained 1.5 h after administration. Furthermore, the antibody activity of secretory IgA did not change until 2 h after administration; however, the activity of IgG and IgM antibodies decreased by approximately 60% and 40% at 2 h after administration, respectively. Seven beagle dogs inoculated with Escherichia coli O157:H7 producing VT2 were administered bovine colostral antibody or bovine colostral whey without antibody. With administration of bovine colostral whey without antibody, the amount of VT2 in feces decreased gradually after administration and increased again at 5 d after inoculation, whereas bovine colostral antibody significantly reduced the amount of VT2 in feces on the day after administration. In addition, 9 beagle dogs were given bovine colostral antibody, bovine plasma antibody, or saline. The amount of VT2 in feces again decreased significantly more rapidly after administration of bovine colostral antibody than after administration of bovine plasma antibody or saline.

Document Type: Research Article

Affiliations: 1: Laboratory of Immunology, School of Life and Environmental Science, Azabu University, Sagamihara, Kanagawa, Japan 2: Laboratory of Microbiology, School of Life and Environmental Science, Azabu University, Sagamihara, Kanagawa, Japan 3: Laboratory of Immunology, School of Life and Environmental Science, Azabu University, Sagamihara, Kanagawa, Japan. yamamoto@azabu-u.ac.jp

Publication date: April 1, 2009

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  • Comparative Medicine (CM), an international journal of comparative and experimental medicine, is the leading English-language publication in the field and is ranked by the Science Citation Index in the upper third of all scientific journals. The mission of CM is to disseminate high-quality, peer-reviewed information that expands biomedical knowledge and promotes human and animal health through the study of laboratory animal disease, animal models of disease, and basic biologic mechanisms related to disease in people and animals.

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