About the Authors

Victoriya V. Volkova

Victoriya.Volkova@ed.ac.uk

Affiliation Epidemiology Group, Centre for Infectious Disease, School of Biological Sciences, University of Edinburgh, Ashworth Laboratories, Edinburgh, United Kingdom

R. Hartford Bailey

Affiliation Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi, United States of America

Robert W. Wills

Affiliation Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Analyzed the data: VVV RWW. Wrote the paper: VVV RHB RWW. Provided original idea of exploratory analysis of soil properties as risk factors, participated in collection and processing of samples from broiler houses, processed data on soil properties, designed modelling and statistical framework: VVV. Designed sample collection strategy, organized and participated in collection and processing of samples from broiler houses, organized and participated in microbiological diagnostics of the samples: RHB. Designed sample collection strategy, organized and participated in collection and processing of samples from broiler houses, designed modelling and statistical framework: RWW.