Infectious Diseases Research Staff in Dallas

One Of The Premier, Leading Clinical Trial Sites
In The United States


North Texas Infectious Diseases Consultants Infectious Disease Research Department Is One Of The Leading Clinical Trial Sites In The United States.

NTIDC research department was developed in 2001 by Dr. Louis Sloan and Bryan King to provide access to the latest cutting-edge treatments for our patients. We have conducted 100’s of clinical trials that helped bring some of the latest treatments to market.

Our dedicated research staff is comprised of some of the most well-respected Principle Investigators, Sub-Investigators, Research Nurses, Research Coordinators, Investigational Pharmacists, and Technicians in the United States.

Our staff is comprised of highly trained and certified individuals with over 20 years of experience and 100’s of completed studies. All staff are GCP trained and specialty trained in Infectious Diseases. We are committed to providing our community with the latest infectious diseases research and treatment options, and to treating each of our patients with the dignity, compassion and respect.

Experienced & Professional Staff at North Texas Infectious Diseases ConsultantsFrom left to right: Back row from left: Jessica, Tammy, Erin, and Bryan. Bottom row from left: Sulema, Gabie, and Misty.

The Research Team

Bryan King, LVN, CCRCBryan King, LVN, CCRC

Director of Clinical Research –

Bryan King joined North Texas Infectious Diseases Consultants in 2001 as the Director of the Research Department which he helped develop with Dr. Louis Sloan. Bryan has helped to expand the Research Department to a multi-phase respected site conducting multiple studies that continue the fight against HIV and other infectious diseases. He has established excellent ongoing relationships with sponsoring Pharmaceutical companies, giving patients access to new and improved treatments. Bryan graduated from nursing school in North Little Rock, Arkansas in 1989 and then moved to Dallas to help fight AIDS as a HIV Nurse. He is a member of the Association of Clinical Research Professionals and certified as a Clinical Research Coordinator.

Principle Investigators

Mezgebe Berhe, MD, MPHMezgebe Berhe, MD, MPH

Dr. Berhe joined NTIDC in 2005 after completing his ID fellowship at Virginia Commonwealth University in Virginia and his Internal Medicine residency at St. Barnabas Hospital affiliated with Cornell Medical Center in New York City. He also holds a Master of Public Health in Epidemiology.

Since joining NTIDC in 2005, Dr Berhe has been an integral member of the NTIDC Research department, serving as a Principle Investigator and Sub-investigator for numerous clinical trials for infectious diseases, including HIV, C-Diff, antibiotics, Hepatitis C, and new vaccines. He has participated in more than 80 clinical trials and has helped the research department achieve it reputation for the high standers of data collection, GCP and exceptional patient care. He is married with three children, and enjoys espresso while watching Arsenal FC Soccer and Seinfeld.

Christopher J. Bettacchi, MD

Christopher J. Bettacchi, MD

Dr. Bettacchi joined North Texas Infectious Diseases Consultants in 2010 after completing his Infectious Diseases fellowship at the UAB Medical Center in Alabama. He graduated from the University of Notre Dame in Indiana and completed his medical school training at St. George’s University in New York.

In 2011 Dr. Bettacchi started participating in the research program at NTIDC as a sub-investigator, and in 2016 he became a more valuable member of our research team as a Principle Investigator. He continues to help NTIDC make an impact to the research community by contributing to the data of so many lifesaving medications that have come to market. He has participated in more the 50 clinical trials for HIV, antibiotics, vaccines and other infectious disease medications. Dr. Bettacchi is married with 2 children, and enjoys running and biking at White Rock Lake!

Our Research Team Members

All of our Infectious Diseases clinical trials are conducted in our offices located on the campus of Baylor University Medical Center near Downtown Dallas.

Research Team Members

Research Nurse

Name: Elisha Thomas, LVN
Phone: 214-276-5646


Name: Tammy Morgan, CRC
Phone: 214-276-5619

Name: Misty Kell, CRC
Phone: 214-276-5620

Name: Jessica Caldwell, CRC  
Phone: 214-247-4114

Data Entry/ Regulatory Coordinator

Name: Sulema Pedraza
Phone: 214-276-5630


Name: Lauren Dunnet, Pharm D
Phone: 214-276-5628

Name: Erin Powell, RPhT, CPhT
Phone: 214-276-5621

Research Assistant

Name: Gabie Walston
Phone: 214-276-5662

We Care About You

Experienced & Professional Staff at North Texas Infectious Diseases Consultants

Embrace your Health

North Texas Infectious Diseases Consultants

We daily strive for a stronger doctor-patient relationship which allows us to deliver outstanding care in a professional and compassionate manner that encompasses the total needs of our patients.

Experienced & Professional Staff at North Texas Infectious Diseases Consultants

Insurance and Patient Fees

North Texas Infectious Diseases Consultants

If you have any additional questions regarding fees or are in need of making special payment arrangements, please speak with one of our Patient Account Managers. As a courtesy to you, our office will file insurance claims. However, patients assume ultimate financial responsibility for payment.

Experienced & Professional Staff at North Texas Infectious Diseases Consultants

Request for medication refills

North Texas Infectious Diseases Consultants

Refill requests require at least 72 hours for approval. Please monitor your pill bottles and contact the pharmacy at least 5 days prior to running out of your medication. Please note that prescription refill authorizations are dependent upon you maintaining the recommended follow-up appointments with your provider.

Current Infectious Disease Clinical Trials

We are currently participating in Phases I, II, III and IV clinical trials for the study and treatment of HIV-infected individuals and are proud to offer our patients the latest experimental treatment options available.

Please contact Bryan King at for information on our current studies.

Research Patients

To be considered for the Research Department, please download and complete the following form and email it to