About the Authors

Jordan R. Gaston

Affiliation Department of Biology, Allegheny College, Meadville, Pennsylvania, United States of America

Sally A. Roberts

Affiliation Department of Microbiology, Auckland District Health Board, Auckland, New Zealand

Tricia L. Humphreys

thumphre@allegheny.edu

Affiliation Department of Biology, Allegheny College, Meadville, Pennsylvania, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JRG TLH. Performed the experiments: JRG TLH. Analyzed the data: JRG. Contributed reagents/materials/analysis tools: SAR TLH. Wrote the paper: JRG SAR TLH.