Edit Entry

Michael E. Zegans, MD

Professor of Surgery
Professor of Microbiology and Immunology
Section Chief Ophthalmology

Microbiology and Immunology

F.I. Proctor Foundation, UCSF, Fellow in Cornea and Uveitis 1996-1998
University of Virginia, Resident in Ophthalmology, 1993-1996
University of California - San Francisco, Mt. Zion, Medical Internship 1992-1993
University of California - San Francisco School of Medicine, MD 1992
Wesleyan University, BA 1985

Molecular Pathogenesis Program


Contact Information:

Section of Ophthalmology
Dartmouth Hitchcock Medical Center
Lebanon NH 03756

Phone: 603-650-5123

Asst. Phone: 603-650-8746

Professional Interests:

Clinical: Diseases of the cornea, ocular surface and uveitis

Surgical: Corneal transplantation, cataract surgery, conjunctival tumors

Research: Ocular microbiology/infection and bacterial biofilm formation

Grant Information:

NEI: 5K08EY013977-05

5 year grant to study bacterial biofilm formation in eye infections involving pseudomonas aeruginosa

Steroids for Corneal Ulcer Trial (SCUT)

NEI funded trial of the role of topical steroids in the treatment of bacterial corneal ulceration. The study is a collaboration between the Proctor Foundation at UCSF, Dartmouth and Aravind Eye Hospital in Tamil Nadu, India.

Courses Taught:

Decoding the Uveitis Workup, American Academy of Ophthalmology Instructional Course. 2001-present

BIOL 071 - Current Topics in Cell Biology, Department of Biologic Sciences, Dartmouth College 2014

BIOL 070 - Biologic Lessons of the Eye, Department of Biologic Sciences, Dartmouth College 2016

Selected Publications:


Ocular Changes Over 60 Minutes in Supine and Prone Postures.
Anderson AP, Babu G, Swan JG, Phillips SD, Knaus DA, Toutain-Kidd CM, Zegans ME, Fellows AM, Gui J, Buckey JC
J Appl Physiol (1985). 2017 May 25;:jap.00687.2016. doi: 10.1152/japplphysiol.00687.2016. Epub 2017 May 25.
PMID: 28546470

<i>Rhodotorula</i> Endogenous Endophthalmitis: A Novel Harbinger of the Injection Drug Epidemic in the United States.
Luong PM, Kalpakian B, Jaeger LJ, Lahey T, Chapman CB, Zegans ME
Case Rep Infect Dis. 2017;2017:9686353. doi: 10.1155/2017/9686353. Epub 2017 Apr 5.
PMID: 28480087

Adjunctive Oral Voriconazole Treatment of Fusarium Keratitis: A Secondary Analysis From the Mycotic Ulcer Treatment Trial II.
Prajna NV, Krishnan T, Rajaraman R, Patel S, Shah R, Srinivasan M, Devi L, Das M, Ray KJ, O'Brien KS, Oldenburg CE, McLeod SD, Zegans ME, Acharya NR, Lietman TM, Rose-Nussbaumer J, Mycotic Ulcer Treatment Trial Group.
JAMA Ophthalmol. 2017 Jun 1;135(6):520-525. doi: 10.1001/jamaophthalmol.2017.0616.
PMID: 28426856

The cif Virulence Factor Gene Is Present in Isolates From Patients With Pseudomonas aeruginosa Keratitis.
Bahl CD, St Laurent JD, Karthikeyan RS, Priya JL, Prajna L, Zegans ME, Madden DR
Cornea. 2017 Mar;36(3):358-362. doi: 10.1097/ICO.0000000000001132.
PMID: 28079684

Effect of Oral Voriconazole on Fungal Keratitis in the Mycotic Ulcer Treatment Trial II (MUTT II): A Randomized Clinical Trial.
Prajna NV, Krishnan T, Rajaraman R, Patel S, Srinivasan M, Das M, Ray KJ, O'Brien KS, Oldenburg CE, McLeod SD, Zegans ME, Porco TC, Acharya NR, Lietman TM, Rose-Nussbaumer J, Mycotic Ulcer Treatment Trial II Group.
JAMA Ophthalmol. 2016 Dec 1;134(12):1365-1372. doi: 10.1001/jamaophthalmol.2016.4096.
PMID: 27787540

Aspergillus fumigatus Photobiology Illuminates the Marked Heterogeneity between Isolates.
Fuller KK, Cramer RA, Zegans ME, Dunlap JC, Loros JJ
MBio. 2016 Sep 20;7(5) pii: e01517-16. doi: 10.1128/mBio.01517-16. Epub 2016 Sep 20.
PMID: 27651362

Environmentally Endemic Pseudomonas aeruginosa Strains with Mutations in lasR Are Associated with Increased Disease Severity in Corneal Ulcers.
Hammond JH, Hebert WP, Naimie A, Ray K, Van Gelder RD, DiGiandomenico A, Lalitha P, Srinivasan M, Acharya NR, Lietman T, Hogan DA, Zegans ME
mSphere. 2016 Sep-Oct;1(5) pii: e00140-16. doi: 10.1128/mSphere.00140-16. Epub 2016 Sep 7.
PMID: 27631025

Bacterial corneal ulcer associated with common variable immune deficiency.
Tsui E, Deng J, Siedlecki AN, Zegans ME
J Ophthalmic Inflamm Infect. 2016 Dec;6(1):28. doi: 10.1186/s12348-016-0098-8. Epub 2016 Aug 5.
PMID: 27491761

Changing Azole Resistance: A Secondary Analysis of the MUTT I Randomized Clinical Trial.
Prajna NV, Lalitha P, Rajaraman R, Krishnan T, Raghavan A, Srinivasan M, O'Brien KS, Zegans M, McLeod SD, Acharya NR, Keenan JD, Lietman TM, Rose-Nussbaumer J, Mycotic Ulcer Treatment Trial Group.
JAMA Ophthalmol. 2016 Jun 1;134(6):693-6. doi: 10.1001/jamaophthalmol.2016.0530.
PMID: 27054515

Candida Interface Infections After Descemet Stripping Automated Endothelial Keratoplasty.
Tsui E, Fogel E, Hansen K, Talbot EA, Tammer R, Fogel J, Daly ER, Noble J, Caine L, Zegans ME
Cornea. 2016 Apr;35(4):456-64. doi: 10.1097/ICO.0000000000000778.
PMID: 26890665