Relationship between Bacterial Translocation and Isolation of Enteric Bacteria from Extraintestinal Organs in Slaughtered Pigs
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概要
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Enteric bacteria, especially Escherichiacoli, have been isolated from porcine livers affected with ascariasis. We hypothesized that reason for this bacterial isolation was due to bacterial translocation (BT). In order to clarify the association between ascariasis and isolation of Enterobacteriaceae in the livers,12 pigs with ascariasis (ascariasis group), 12 pigs without ascariasis (non-ascariasisA group) were used. Jejunum, ileum, cecum, colon, livers, mesenteric lymphnodes (MLN), and portal blood were obtained from these pigs. Furthermore, in order to confirm the presence of BT in pigs, the samples mentioned above as well as spleens were obtained from 11 pigs without ascariasis (non-ascariasisB group) and 6 specific pathogen free (SPF) pigs without ascariasis (non-ascariasisSPF group). In the first experiment, the Gram-negative bacteria were isolated from livers (66.7%), MLN (91.7%), and portal blood (55.6%) regardless the presence of ascariasis. In the second experiment, isolation rates of Gram-negative and positive bacteria were 52.9 and 66.7% for livers, 52.9 and 80% for MLN, 11.8 and 26.7% for spleens, and 40 and 20% for portal blood of the pigsexamined, respectively. E. coli and Staphylococcus were the predominant isolates from these pigs. A large number of antigens immunodetected by E. coli polyclonal antibody were found in the damaged cecalmucosa. These findings present evidence that BT is generally observed in slaughtered pigs regardless the presence of ascariasis. This has challenged our notion that extraintestinal organs of pigs are usually maintained as sterile.
著者
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OHBA Takemi
Toyama Prefectural Meat Inspection Center
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Murakami Satoshi
Department Of Applied Chemistry Faculty Of Engineering
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KANAZAWA Mio
Department of Animal Science, Tokyo University of Agriculture
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SUGISHIMA Masahito
Kanagawa Prefectural Meet Inspection Center
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OGAWA Akihiro
Chuo Animal Health and Hygiene Service Center
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