Infectious Disease Treatment

Excellent Compassionate Healthcare is Our Mission

Welcome to Infectious Diseases Specialists of Fairfield. We bring a long tradition of clinical excellence and research to our new outpatient office in beautiful downtown Fairfield, CT for an enjoyable patient experience.

Our Services

Infectious disease is a specialty which deals with all problems related to infection, including HIV, post-surgical infections and tick borne diseases such as Lyme disease.

HIV Care

The management of HIV/AIDS normally includes the use of multiple antiretroviral drugs to control HIV infection. We can help those who are infected live a full life and assist non infected partners with pre exposure prophylaxis.

Post-Surgical Infections & Wound Care

Infection occurs when pathogens multiply at the site of a wound or after a surgical incision. We can assist your surgeon to allow optimal healing.

Post Travel Illness & Tropical Diseases

Most post-travel infections become apparent soon after travel, but incubation periods vary. We have first hand knowledge of many popular destinations. Our team keeps up with changing problems throughout the world.

Inpatient & Outpatient Care

We practice both in hospital and in our clinic to help ensure timely diagnosis and treatment for our patients. We assist patients with arranging in home services to minimize time spent in hospital.

Pre-Employment Vaccination

Your job may require appropriate vaccines to reduce the chance that you will get or spread vaccine-preventable diseases. 

TB & TB Exposure

Tuberculosis (TB) usually attacks the lungs, but can attack any part of the body such as the kidney, spine, and brain. 

Lyme & Tick Borne Diseases

These prevalent diseases are acquired when an infected tick transmits the illness to the humans and animals it bites.

Pre-Travel Consultation & Vaccination

Prepare for health concerns that might arise with travel by understanding risks and methods for prevention.

A Convenient & Comfortable Experience

Our new offices offers a pleasant alternative to large hospitals or inconvenient city clinics. The facilities include three examination rooms, testing and lab preparation capabilities and a climate controlled waiting area.

Our dedicated staff includes three nurses who have been with the practice many years and are ready to assist patients with questions and scheduling of consultations.

Our office is located in the heart of downtown Fairfield, Connecticut. Patients can enjoy easy access with ample parking, wheel chair access, mere steps from the Fairfield train station.

Meet Our Physicians

Selecting an infectious disease physican is an important decision in your personal health care. Our experienced staff and  board certified specialists are dedicated to providing you with high quality, compassionate medical care.

Passalacqua, MD

Board Certified

Infectious Diseases
Internal Medicine

Medical Degree

SUNY Health Science Center, Syracuse, New York

Internship & Residency

Robert Wood Johnson University Hospital, New Brunswick, NJ


University of Maryland, Baltimore, MD


Connecticut Magazine’s “Top Doctors”
2015, 2016, 2017, 2018

Dr. Passalacqua is board certified in infectious diseases and internal medicine. She has been in practice more than 20 years. Dr. Passalacqua is affiliated with St. Vincents Medical Center in Bridgeport Connecticut and is Chief of Infectious Diseases at the 473 bed community hospital. She is a member of Community Medical Group and serves patients in the Yale New Haven Health EPIC system.

Dr. Passalacqua received her undergraduate degree from SUNY at Binghamton, Binghampton, New York.

Thereafter she went on to receive her medical degree from the State University of New York Upstate Medical Center in Syracuse, New York in 1992.

After graduation she completed her internship and residency at the University of Medicine and Dentistry Robert Wood Johnson, New Brunswick, New Jersey.

She then completed her fellowship training in Infectious Diseases with the University of Maryland Medical Center in Baltimore, Maryland. During her fellowship Dr. Passalacqua trained at the University of Maryland Institiute for Human Virology, the Cowley Shock Trauma Unit, the Johns Hopkins Hospital and the National Institutes of Health in Bethesda Maryland.

Dr. Passalacqua is an avid traveller and can provide pre travel consultation and vaccination as well as care for post travel and tropical diseases.

Pre travel consultation and vaccination for global destinations

Community Involvement

Monkey Pox

Health Matters: Monkey Pox

News 12 CT
Hartford HealthCare
Lyme disease tick

Melissa in the Morning: About Lyme disease


lyme disease activities

A Tick Bite Almost Ended Her Career: Shania Twain’s Battle With Lyme Disease

Hartford Healthcare

Summer Covid Surge Concerns

Summer Covid Surge Concerns

News 8
Hartford HealthCare

long covid

She's Still Using a Portable Oxygen Tank 18 Months After COVID

Hartford Healthcare


Melissa in the Morning: Long Haulers


News Interview

Why bird flu is concerning some health experts in Connecticut

Dr. Jo-Anne Passalacqua - News 8

COVID masks helping to prevent other illnesses like strep, CT experts say

Dr. Jo-Anne Passalacqua - News 8

Doctor discusses what happens when you contract ‘flurona’

New 8 –


Infectious Disease doctor explains the benefits of COVID-19 booster shots

News 8 –

News Interview

Local infectious disease specialist on boosters: 'Do it now'

News Interview

Infectious disease doctor says J&J booster is 'absolutely what we need'

masked people

Outdoor mask guidance adds to Connecticut's COVID confusion

News Interview

The New Normal: Doctors discuss when COVID-19 booster shots would be needed

News Interview

Bridgeport Hospital doctors agree with US panel, say benefits of J&J vaccine outweigh risks

News Interview

CT doctor: Widespread flu shots this fall could help keep hospitals from getting overwhelmed

News 8 –


Experts: 'Twindemic' could have 'crippling effect' on Connecticut hospitals

Accepted Insurance

ID Specialists files claims for insured patients directly to Medicare and many insurance companies and managed care plans. This list contains our most commonly billed insurance carriers, which are subject to change. Please contact us directly if you have questions about your coverage.

  • Aarp
  • Aetna
  • Aetna Golden Mcr Mgd
  • BCBS
  • BCNS CT Pb Alt Payor
  • BCBS Mcr Mgs
  • Champva
  • Cigna
  • Commercial Genetic
  • Connecticare
  • Connecticare Mcr Mgd
  • Diversified Admin
  • Geha
  • Ghi
  • Harvard Pilgrim
  • Medicare
  • Meridian Health
  • Mvp HEalthplan
  • Oxford
  • SNF Generic
  • Stirling Benefits
  • Tricare
  • Umr
  • United Healthcare
  • United Healthcare Mcr Mgd
  • Well-care Choice Mcr Mgd
  • Workers Comp Generic
  • Workers Compensation Trust

ID Specialists Fairfield

1300 Post Rd. Suite 208
Fairfield, CT 06824
Phone: (203) 384-0451

Excellent Compassionate Health Care is Our Mission

For medical emergencies please contact emergency medical services

1300 Post Rd. Suite 208 Fairfield, CT 06824

Phone: (203) 384-0451

Fax (203) 384-0472

Hours of Operation

  • Mon. 9am – 6pm
  • Tues. 9am – 5pm
  • Wed. 9am – 6pm
  • Thurs. 9am – 6pm
  • Fri. 9am – 5pm