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Transmission of F4+ E. coli in groups of early weaned piglets

  • P. L. GEENEN (a1) (a2), D. DÖPFER (a1), J. VAN DER MEULEN (a1) and M. C. M. DE JONG (a1) (a2) (a3)

Abstract

The aim of this study was to estimate transmission parameters of enterotoxigenic F4+ Escherichia coli F4 (F4+ E. coli) in groups of early weaned piglets with F4-receptor-positive (F4R+) and F4-receptor-negative piglets (F4R−). Transmission of F4+ E. coli was quantified in four heterogeneous groups of F4R+ and F4R− piglets. Infectiousness was determined by the number of F4+ E. coli/g faeces shed during 8 days. Transmission parameters were estimated using generalized linear models assuming a stochastic SIR model. F4R+ piglets were found to be more susceptible than F4R− piglets, but F4R+ and F4R− piglets were not different in infectiousness. The reproduction ratios for homogeneous F4R+ and F4R− populations were estimated as 6·37 (95% CI 1·89–21·48) and 0·02 (95% CI 0·00–1·13) respectively. The implication of these results is that in order to prevent major outbreaks, the fraction of F4R+ piglets should be small (approximately 10% or less). Therefore, selective breeding programmes could contribute to reducing F4+ E. coli-related diarrhoea and transmission.

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Corresponding author

Institute for Information and Computing Sciences, Utrecht University, PO Box 80.089, 3508 TB Utrecht, The Netherlands. (Email: petrag@cs.uu.nl)

Transmission of F4+ E. coli in groups of early weaned piglets

  • P. L. GEENEN (a1) (a2), D. DÖPFER (a1), J. VAN DER MEULEN (a1) and M. C. M. DE JONG (a1) (a2) (a3)

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