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Title: Seroprevalence of F4(+) enterotoxigenic Escherichia coli in regions with different pig farm densities
Authors: Van den Broeck, W ×
Cox, E
Goddeeris, Bruno #
Issue Date: 1999
Publisher: ELSEVIER SCIENCE BV
Series Title: Veterinary microbiology vol:69 issue:3 pages:207-216
Conference: date:State Univ Ghent, Dept Morphol, Fac Med Vet, Lab Vet Immunol, B-9820 Merelbeke, Belgium; Katholieke Univ Leuven, Fac Agr & Appl Biol Sci, Lab Physiol & Immunol Domest Anim, B-3001 Heverlee, Belgium
Abstract: Sera of young sows from 135 closed Belgian pig breeding farms were examined for the presence of serum antibodies specific for the F4 fimbrial antigen of enterotoxigenic Escherichia coli (ETEC). Since 80% of all pig farms in Belgium are located in the provinces West-Vlaanderen (44%, approximately 18 farms/10 km(2)), Oost-Vlaanderen (20%, approximately 9 farms/10 km(2)), Antwerpen (10%, approximately 5 farms/10 km(2)) and Vlaams-Brabant (6%, approximately 3 farms/10 km(2)), the farms examined were randomly selected in these four regions. On 68% of all tested farms, sows were not vaccinated against enteric colibacillosis. In general, 65% of these nonvaccinated farms were F4-seropositive (mean optical density [OD405] > 0.5) Of which 38% were weakly (mean OD405 = 0.5-1.0), 21% moderately (mean OD405 = 1.0-2.0) and 6% strongly positive (mean OD405 greater than or equal to 2.0). These percentages showed major differences between the four provinces. In Vlaams-Brabant, only 31% of non-vaccinated farms were seropositive, of which most were regarded as weakly positive. In Antwerpen, Oost- and West-Vlaanderen however, this percentage was clearly higher and respectively 68, 71, and 79% of non-vaccinated farms were seropositive, of which most were weakly positive. These observations indicate that F4(+) ETEC is widely spread and highly prevalent on non-vaccinated pig breeding farms in Belgium. Moreover, an increasing F4-seropositivity with increasing pig farm density suggests a possible influence of the swine density on the prevalence of F4(+) ETEC infections. (C) 1999 Elsevier Science B.V. All rights reserved.
ISSN: 0378-1135
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Division of Gene Technology (-)
× corresponding author
# (joint) last author

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