Infectious Disease Specialists


The physicians at Infectious Diseases Associates, P.C. offer infectious disease consultations and a broad range of treatments and therapies, such as Fecal Microbiota Transplantation,  Diagnosis and Treatment of Sexually Transmitted Diseases, Diagnosis and Treatment of HIV, Hepatitis, Lyme Disease, as well as, other Tick-borne Diseases, Tuberculosis and Management of HIV pre-exposure prophyllaxis (PrEP).       

Our office utilizes T-Spot for tuberculosis testing of all immuno-compromised patients. Patients suspected of having Lyme Disease may have a Panel of tests performed for a variety of tick-borne diseases common to the Northeastern United States.

Infectious Disease Specialists in Bucks, Philadelphia & Montgomery Counties

The physicians at Infectious Diseases Associates, P.C. are on staff at the following hospitals and institutions:  Jefferson Bucks,  Jefferson Torresdale, Jefferson Frankford, Holy Redeemer Hospital, Jeanes Hospital, Kindred Northeast Philadelphia, Kindred South Philadelphia, Lower Bucks Hospital, Moss Rehabilitation at Jefferson, Nazareth Hospital, St. Mary Medical Center, St. Mary Rehabilitation Hospital, Fox Subacute Philadelphia and Deer Meadows.




Lyme Disease and other Tick-borne Diseases

 If you suspect that you may have Lyme Disease, call our office for an appointment to be tested! We will schedule you to have your blood drawn, with test results back in 24- 48 hours.

There are over 300,000 people diagnosed with Lyme Disease every year. However, we can also test for other tick-borne diseases which are common in this area. Many of the symptoms are very similar!

Fecal Microbiota Transplantation for Clostridium difficile

Infectious Diseases Associates, P.C. "Clostridium difficile" infection of the colon may cause colitis (bowel inflammation), fever, and/or diarrhea.  "Fecal Microbiota Transplantation", offers an alternative therapy to patients who have suffered recurrent infection despite receiving standard oral antibiotic therapy. Many studies, have shown a high cure rate with low relapse rate.¹
FMT is a procedure whereby stool (fecal bacteria) is donated from a healthy individual and instilled into the patient. This process restores the colonic microflora by using healthy bacterial flora to replace or "crowd out" the harmful Clostridium difficile bacterium.

Call and schedule an appointment with Dr. Donald K. Marcus.
1.         Burke KE, Lamont JT (August 2013). "Fecal Transplantation for Recurrent Clostridium difficile Infection in Older Adults: A Review.”. Journal of the American Geriatrics Society 61 (8): 1394–8.


Information for Patients having FMT:

Treatment of STD's (Sexually Transmitted Diseases)

Dr. Divya Sareen is now conducting a STD (Sexually Transmitted Diseases) Clinic on Thursday mornings. Some of the Bacteria, Fungus and Parasites that may be transmitted are HIV, Herpes Simplex Virus, Chlamydia, Syphilis, Gonorrhea, Candida, Viral Hepatitis, and Trichomonas.

(CNN) There were more reported cases of sexually transmitted diseases last year than ever before in the United States, according to the latest STD surveillance report by the Centers for Disease Control and Prevention (released Wednesday, October 20, 2016).

Reported cases of primary and secondary syphilis rose by 19%, gonorrhea cases rose by 12.8%, and chlamydia cases rose by 5.9%, from 2014. All three STDs are curable with antibiotics, but most infections go undiagnosed and untreated, according to the CDC.