About the Authors

Popchai Ngamskulrungroj

Affiliations Molecular Microbiology Section, Laboratory of Clinical Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America, Department of Microbiology, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand

Yun Chang

Affiliation Molecular Microbiology Section, Laboratory of Clinical Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America

Bryan Hansen

Affiliation Electron Microscopy Unit, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, Montana, United States of America

Cliff Bugge

Affiliation FEI Company, Hillsboro, Oregon, United States of America

Elizabeth Fischer

Affiliation Electron Microscopy Unit, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, Montana, United States of America

Kyung J. Kwon-Chung

june_kwon-chung@nih.gov

Affiliation Molecular Microbiology Section, Laboratory of Clinical Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America

Competing Interests

The authors have the following interest: Cliff Bugge is employed by a private company (FEI company). There are no patents, products in development or marketed products to declare. This does not alter the authors' adherence to all the PLoS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: PN YC KJK. Performed the experiments: PN BH CB. Analyzed the data: PN YC BH CB EF KJK. Contributed reagents/materials/analysis tools: CB EF KJK. Wrote the paper: PN YC BH EF KJK.