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Table 3 Incidence rate ratios of diarrhea cases in pigs shedding E. coli with different virulence factors

From: Post-weaning diarrhea in pigs weaned without medicinal zinc: risk factors, pathogen dynamics, and association to growth rate

  Cases/pig days Incidence rate ratio 95% Confidence Interval Std. Err p value
Baseline incidence rate (constant)   0.06 0.03 0.11 0.02 5.5e−22
Producer
 Producer A 12/415 1.00 (base)  
 Producer B 18/385 3.78 1.85 12.83 2.41 0.001
Virulence factors
 H+, F+T+ 17/209 1.00 (base)     
 H+, F−, T+ 1/5 1.87 0.25 14.24 1.94 0.544
 H+, F+, T− 11/150 0.25 0.09 0.68 0.13 0.007
 H+, F−, T− 2/48 0.10 0.033 0.01 0.11 0.033
 H− 0/361 NAa     
  1. Incidence rate ratios were estimated with a Poisson regression model. E. coli was cultured from rectal swabs collected from a cohort of piglets raised at two commercial Danish indoor producers. Data was included from the seventh to the 14th day after insertion to the nursery units
  2. H+/H−, hemolytic E. coli positive/negative; F+/F−, fimbria positive/negative; T+/T−, toxin positive/negative
  3. aIncidence rate was 0