About the Authors

Christine E. Ferragine

Affiliation Department of Microbiology and Immunology, Uniformed Services University of the Health Sciences, Bethesda, Maryland, United States of America

Colleen D. Walls

Affiliation Department of Microbiology and Immunology, Uniformed Services University of the Health Sciences, Bethesda, Maryland, United States of America

Stephen J. Davies

stephen.davies@usuhs.edu

Affiliation Department of Microbiology and Immunology, Uniformed Services University of the Health Sciences, Bethesda, Maryland, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CEF SJD. Performed the experiments: CEF CDW. Analyzed the data: CEF CDW SJD. Contributed reagents/materials/analysis tools: CEF CDW SJD. Wrote the paper: CEF SJD.