Clinical Parasitology Section

Thomas Nutman, M.D.

Lab Chief, Laboratory of Parasitic Diseases
Chief, Helminth Immunology Section
Chief, Clinical Parasitology Section

Contact: For contact information, search the NIH Enterprise Directory.

Provides direct clinical care to patients at NIH Clinical Center

A headshot of Thomas Nutman in a white shirt.

Thomas Nutman, M.D. is also the Chief of the Helminth Immunology Section.

Major Areas of Research

  • Clinical definition and pathogenesis underlying parasitic diseases
  • New methods of diagnosis of parasitic infections
  • Therapeutic interventions in parasitic infections
  • Hypereosinophilic syndromes (HES): from pathogenesis to novel therapeutic interventions

Program Description

The Clinical Parasitology Section is an interdisciplinary group of clinically trained LPD staff members who oversee the clinical research portfolio and provide clinical care, consultations, and training in tropical medicine and parasitology. The overriding goals of this program are

  • To gain insight into the clinical syndromes associated with parasitic infections
  • To understand and help define the pathogenesis underlying clinical disease
  • To identify better ways of treating individual infections and to prevent secondary consequences of treatment
  • To develop better diagnostic tools for the species-specific diagnosis of active parasitic infection

Although the Clinical Parasitology Section has protocols to see patients with any parasitic infection, the overwhelming majority of patients have neurocysticercosis, filarial infections (lymphatic filariasis, onchocerciasis, loiasis, mansonellosis), strongyloidiasis, hookworm infections, ascaraisis, giardiasis, echinococcosis, and leishmaniasis. We occasionally see patients with gnathostomiasis, African trypanosomiasis, Chagas disease, and malaria, among others.



Dr. Nutman received his A.B. from Brown University and his M.D. from the University of Cincinnati College of Medicine. He did an internal medicine residency at New York University (Bellevue) and postdoctoral training in the Laboratory of Parasitic Diseases (LPD).

Dr. Nutman received his A.B. from Brown University and his M.D. from the University of Cincinnati College of Medicine. He did an internal medicine residency at New York University (Bellevue) and postdoctoral training in the Laboratory of Parasitic Diseases (LPD). He is board certified in internal medicine and allergy and immunology. He also holds a diploma/certificate in tropical medicine and travelers’ health. He has been at NIH in the Laboratory of Parasitic Diseases since 1982, where he is currently LPD's chief, as well as chief of both the Helminth Immunology Section and the Clinical Parasitology Section. In addition, he is the director of the NIAID International Center for Excellence in Research (ICER) located in Chennai, India, as well as director of the filariasis unit at the NIAID ICER in Mali. He is on numerous advisory committees and editorial boards and holds patents related to parasite diagnosis and vaccine development. He is the author or coauthor of over 600 papers and book chapters and has received multiple awards for his work in tropical medicine and immunology.

Selected Publications

The Local Inflammatory Profile and Predictors of Treatment Success in Subarachnoid Neurocysticercosis. Harrison S, Thumm L, Nash TE, Nutman TB, O'Connell EM. Clin Infect Dis. 2021 May 4;72(9):e326-e333. doi: 10.1093/cid/ciaa1128. PMID: 33269789

Efficacy and Tolerability of Miltefosine in the Treatment of Cutaneous Leishmaniasis. Ware JM, O'Connell EM, Brown T, Wetzler L, Talaat KR, Nutman TB, Nash TE. Clin Infect Dis. 2021 Oct 5;73(7):e2457-e2562. doi: 10.1093/cid/ciaa1238. PMID: 33124666

A Randomized, Placebo-controlled, Double-blind Pilot Study of Single-dose Humanized Anti IL5 Antibody (Reslizumab) for the Reduction of Eosinophilia Following Diethylcarbamazine Treatment of Loa loa Infection. Legrand F, Herrick J, Makiya M, Ramanathan R, Thompson R, Rampertaap S, Stoddard J, Ware J, Fay MP, Holland-Thomas N, Nutman TB, Klion AD. Clin Infect Dis. 2021 Oct 5;73(7):e1624-e1631. doi: 10.1093/cid/ciaa1365. PMID: 32910141

Infection-associated Immune Perturbations Resolve 1 Year Following Treatment for Loa loa. Herrick JA, Makiya MA, Holland-Thomas N, Klion AD, Nutman TB. Clin Infect Dis. 2021 Mar 1;72(5):789-796. doi: 10.1093/cid/ciaa137. PMID: 32055862

Single-Organ and Multisystem Hypereosinophilic Syndrome Patients with Gastrointestinal Manifestations Share Common Characteristics. Kuang FL, Curtin BF, Alao H, Piligian B, Berry A, Holland-Thomas N, Powers A, Quezado M, Lumbard K, Fay MP, Klion AD, Kumar S, Khoury P.J Allergy Clin Immunol Pract. 2020 Sep;8(8):2718-2726.e2. doi: 10.1016/j.jaip.2020.04.025. Epub 2020 Apr 25.PMID: 32344186 
Benralizumab for PDGFRA-Negative Hypereosinophilic Syndrome. Kuang FL, Legrand F, Makiya M, Ware J, Wetzler L, Brown T, Magee T, Piligian B, Yoon P, Ellis JH, Sun X, Panch SR, Powers A, Alao H, Kumar S, Quezado M, Yan L, Lee N, Kolbeck R, Newbold P, Goldman M, Fay MP, Khoury P, Maric I, Klion AD.N Engl J Med. 2019 Apr 4;380(14):1336-1346. doi: 10.1056/NEJMoa1812185.PMID: 30943337 Free PMC article. Clinical Trial.


A headshot of Thomas Nutman in a white shirt.

Thomas Nutman, MD
Senior Investigator

A headshot of Amy Klion in a green shirt.

Amy Klion, MD
Senior Investigator

A headshot of Paneez Khoury in a lab coat.

Paneez Khoury, MD
Associate Research Physician

A headshot of Elise O'Connell in a lab coat.

Elise O'Connell, MD
Associate Research Physician

A headshot of Gregory Constantine in a blue shirt.

Gregory Constantine, MD
Assistant Research Physician

A headshot of Adrienne Showler with a blue background.

Adrienne Showler, MD
Attending Physician

William Sears, MD
Clinical Infectious Diseases Fellow

A headshot of Janitzio Guzman in a suit and a tie.

Janitzio Guzman, MD
Clinical Infectious Diseases Fellow

A headshot of JeanAnne Ware with a tan background.

JeanAnne Ware, CRNP
Nurse Practitioner

A headshot of Lauren Weltzer in a lab coat.

Lauren Wetzler, MHS, PA-C
Physician Assistant

A headshot of Celeste Nelson in a white lab coat.

Celeste Nelson, CRNP
Nurse Practitioner

Study Coordinators

A headshot of Nicole Holland in a black shirt.

Nicole Holland, MSN, RN
Nurse Research Specialist

A headshot of Thomas Brown in a gray shirt.

Thomas Brown, RN
Nurse Specialist, CCRP

A headshot of Lauren Thumm in a black and blue shirt.

Lauren Thumm, MSN, RN
Protocol Nurse Coordinator II

Perla Adames Castillo, RN 
Nurse Research Specialist

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