Karen Damon Callahan, BSA, BSN, MHS, RN, CPN

Nurse Manager, Neonatal Intensive Care Unit
Associate Director, Center for Global Health
Connecticut Children’s Medical Center


BS Accounting, Sacred Heart University, 1986
BS Nursing, Fairfield University, 2001
Master of Health Science, Quinnipiac University, 2010

Certifications and Honors:

  • Certified Pediatric Nurse
  • Sigma Theta Tau International Honor Society of Nursing, member since 2001
  • Dean Porter Achievement Award, Fairfield University, 2001


Karen Callahan serves on the Board of Directors of The Bawa Health Initiative as a board member and field worker. Additionally, she serves on the Board of Directors of The Faith Mulira Health Care Center, in Masooli, Uganda as a board member. She performed the field work for her master’s thesis in the village of Bawa, Cameroon, “Prevalence of Waterborne Protozoal Parasites in Two Rural Villages in the West Province of Cameroon, Africa.” She also assists with organizing the yearly global health care conference, and the global film festival for Connecticut Children’s Center for Global Health. Most of her time is spent raising five children to be responsible social and global health citizens.

Selected Publications:

  • Richardson, D., Callahan, K.D., Dondji, B., Tsekeng, P., Richardson, K. 2011. Prevalence of Waterborne Protozoan Parasites in Two Rural Villages in the West Province of Cameroon. Comparative Parasitology 78(1): 180 – 184.
  • Richardson, D., Richardson, K.R., Callahan, K.D., Gross, J., Tsekeng, P., Dondji, B., Richardson, K. E. 2011. Geohelminth Infection in Rural Cameroonian Villages. Comparative Parasitology 78(1): 161 – 179.

Cliff O’Callahan, MD, PhD, FAAP

cliff o'callahanPediatric Faculty and Director of Nurseries, Middlesex Hospital
Associate Professor, Pediatrics, University of Connecticut School of Medicine
Assistant Professor, Family Medicine, Frank H. Netter MD School of Medicine, Quinnipiac University


BS, Biochemistry, Southern Connecticut State University, 1983
MD/PhD, Rosalind Franklin University/Chicago Medical School, 1988/1990

University of Washington, Seattle Children’s, 1990-1993

Board Certifications:


Faculty Appointments:

Associate Professor, University of Connecticut School Medicine
Assistant Professor, Frank H. Netter MD School of Medicine, Quinnipiac University

Clinical Interests:

Local and international global health; behavioral, oral, and nutritional wellness, breastfeeding and ankyloglossia, children with special healthcare needs


Cliff O’Callahan is the Director of Nurseries and the Pediatric Program Director at Middlesex Hospital Family Medicine Residency Program,and leads the residency’s Global & Community Health Track.

He spent three years after residency working in Guatemala refugee camps in Mexico and then creating a community health system in the northern jungle area of Guatemala. This was followed by five years serving the Puyallup Tribe of Indians in Tacoma, Washington where he concurrently acted as the Indian Health Service’s Maternal Child Health consultant for the NW states.

He created and leads the Middlesex-Sayaxche Partnership, based on his on-going work in Guatemala, and the Middlesex-University of Rwanda Partnership resulting from involvement in the inaugural group of US educators in the Rwandan Human Resources for Health project.

He serves locally on the AAP’s CT state chapter’s Board and nationally was an AAP Section Forum Management Committee Multidisciplinary Group Chair after his term as Chair of the Section on International Child Health. Dr O’Callahan is currently an invited adviser on the American Board of Pediatrics Global Health Task Force, and an AAP Survive & Thrive adviser to Rwanda on professional society strengthening.

He has been recognized for his activities locally by Rotary with the Paul Harris award, La Leche League CT with the Champion for Breastfeeding, and internationally by Concern America with the Michael Doheny Humanitarian Award.

Selected Publications:

  • St Clair NE, Batra M, Kuzminski J, Lee AC, O’Callahan C. Global Challenges, Efforts and Controversies in Neonatal Care. Clin Perinatol. 2014 Dec;41(4):749-772
  • O’Callahan* C, Macary S, Clemente S. The effects of office-based frenotomy for anterior and posterior ankyloglossia on breastfeeding. Int J Pediatr Otorhinolaryngol. 2013;77:827-32.
  • Khan OA, Guerrant R, Sanders J, Carpenter C, Spotswood M, Jones D, O’Callahan C, Brewer T, Markuns JF, Gillam S, O’Neill J, Nathanson N, Wright, S. Global health education in U.S. medical schools. BMC Med Educ. 2013;13:3.
  • Suchdev PS, Shah A, Derby K, Hall L, Schubert C, Pak-Gorstein S, Howard C, Wagner S, Anspacher M, Staton D, O’Callahan C, Herran M, Arnold L, Stewart C, Kamat D, Batra M, Gutman J. A proposed model curriculum in global child health for pediatric residents. Acad Pediatr. 2012;12:229-37.
  • Anspacher M, Frintner MP, Denno D, Pak-Gorstein S, Olness K, Spector J, O’Callahan C. Global health education for pediatric residents: a national survey. Pediatrics. 2011;128:e1-7.
  • O’Callahan* C. Medical work in resource limited countries. In: Kamat DM, Fischer PR, editors. Textbook of global child health, 2nd edition. AAP-Press; 2015. p. 153-177.
  • O’Callahan* C. Cysticercosis. In: Spector JM, Gibson TE, editors. Atlas of pediatrics in the tropics. AAP Press; 2009. p.73-6.
  • Dueger C, O’Callahan* C. Working in international child health. 2nd ed. AAP Press; 2008
  • Pitt M, St. Clair N, O’Callahan C. AAP Abroad: ten tips for residents considering a global health rotation. AAP News. 2016.
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