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Infectious Diseases

When faced with an infection that can be difficult to diagnose or treat, it is important to consult an expert physician. The Infectious Diseases Department at Orange Regional Medical Group has specialists who are trained to investigate and diagnose all manner of infections and fevers of unknown origin.

They have the knowledge base to treat:

  • Multi-drug resistant infections
  • Surgical infections, such as prosthetic joint infections, and spinal infections.
  • Clostridium Difficile (C. Diff.) Infections through fecal transplant treatment. ORMG is now the first location in the Hudson Valley offering fecal transplant by capsule.
  • Hepatitis C
  • Hepatitis B
  • Tick borne illness, such as Lyme disease, travel medicine
  • Complicated fungal infections and much more.

These specialists can help investigate and contain outbreaks of contagious pathogens in institutions and the community. Combing an in depth knowledge of the microbiology of human pathogens with rigorous training in internal medicine and infectious disease, these specialists are the go-to physicians for complicated infections.

Meet Our Board-certified Infectious Disease Physicians

Marina Keller, M.D.Marina Keller, M.D.

Marina Keller, M.D. joined the medical staff of Orange Regional Medical Center in 2012 and is now part of Orange Regional Medical Group.

Dr. Keller earned her undergraduate degree in Biophysics from Cornell University. She completed her medical degree in 2003 and went on to a residency in internal medicine, a fellowship in infectious disease and a second fellowship in Medical Microbiology at McGill University.

Dr. Keller is board certified by the American Board of Internal Medicine, the American Board of Infectious Diseases and the American Board of Medical Microbiology. She is the co-author of presentations and publications focusing on infectious diseases and microbiology. She has a special interest in medical diagnostics, antimicrobial stewardship and tick borne illness. She is also now treating Clostridium difficile infections with a new breakthrough in treatment called Fecal transplant. It is a proven method to transplant “good bacteria” directly into the colon to stop the chronic diarrhea. ORMG is now the first location in the Hudson Valley offering fecal transplant by capsule.

Dr. Keller grew up in the Hudson River Valley and enjoys birdwatching and the out-of-doors. She has two children, three chickens and an organic vegetable garden.

Joshua Vernatter, M.D., AAHIVS

Joshua Vernatter, M.D., AAHIVS joined the medical staff of Orange Regional Medical Group in 2015.

Dr. Vernatter earned his medical degree from Albert Einstein College of Medicine in Bronx, N.Y. He completed his residency in internal medicine at Long Island Jewish Medical Center in New Hyde Park, N.Y. and his fellowship in infectious diseases at Montefiore Medical Center in Bronx, N.Y.

Dr. Vernatter is board-certified in Internal Medicine and in Infectious Disease. He is certified as an HIV specialist by the American Academy of HIV Medicine. He has co-authored publications on pathogenic bacteria, among other topics, and contributed to self-study texts for medical students. Dr. Vernatter's interests include HIV and AIDS, hepatitis C infection, opportunistic infections, parasitic infections and more.

Prior to joining Orange Regional Medical Group, Dr. Vernatter was an infectious disease physician in the Bronx and in Westchester County, where he cared for patients in hospital and outpatient settings. 

Lucy Cheng, MD

Lucy Cheng, M.D.

Dr. Cheng received her medical degree from Rutgers New Jersey Medical School. She also completed her residency in internal medicine at Rutgers New Jersey Medical School, and her fellowship in infectious diseases at Columbia University Medical Center/NewYork-Presbyterian Hospital.

Dr. Cheng is board-certified in Internal Medicine and Infectious Diseases. She has co-authored presentations and publications on emerging infection, antimicrobial stewardship, and quality improvement. Her interests include Gram-negative bacteria resistance and transmission, Hepatitis C infection, and opportunistic infections.

Contact Orange Regional Medical Group

Orange Regional Medical Group
707 East Main Street 
Middletown, NY 10940

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Orange Regional
Medical Center

707 East Main Street
Middletown, NY 10940
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Orange Regional Medical
Group - Middletown

707 East Main Street
Middletown, NY 10940

Orange Regional Medical
Group - Monroe

475 Route 17M
Monroe, NY 10950

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