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About Us Allergy & Asthma Center of Duncanville

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Allergy & Asthma Center of Duncanville is a fully staffed multi-physician group specializing in allergy and asthma treatments.

Harold DelasAlas, MD, PharmD FAAP, FACP, FAAAAI, FACAAI

Growing up in the Houston suburbs, Dr DelasAlas realized his calling in health care from two exceptional nurses and role models, his parents. He distinguished himself academically by earning his doctorate degree in Pharmacy at the University of Houston with high honors at the age of 23. He went on to excel in medical school at the  University of Texas  Medical Branch, graduating second in his class and elected in the medical honor society, Alpha Omega Alpha. He trained at one of the most prestigious residency programs in Internal Medicine at the Washington University in St Louis/Barnes Jewish Hospital. He completed his Allergy and Immunology subspecialty training at Creighton University, working under a prominent leader and researcher in the field, Dr Thomas Casale. Upon completion, he received appointment as Clinical Assistant  Professor at the University of Nebraska and Creighton University and trained both resident physicians and medical students. Missing his Texan roots, he moved back and joined the Allergy and Asthma Center of Duncanville in 2014 and has served as medical director since 2015. He has been awarded Fellowship status within the American College of Physicians, American College of Allergy, Asthma, and Immunology, and American Academy of Pediatrics.

Click Here to read Dr DelasAlas’s CV.


Anthony Huynh, PA-C

I am from New Orleans, Louisiana and I graduated from the University of New Orleans in 2017 with a Bachelor’s is Biological Sciences. I spent the next 2 years working as a medical assistant at Urgent Care/Family Medicine. I graduated from the PA program at LSU Health Science Center at Shreveport in 2021. I wanted to become a PA because I was always seeing patients come who felt confused on their symptoms, conditions, and treatments. I wanted to learn more about medicine and be able to treat patients as well as help them have a better understanding of their health.

I wanted to pursue allergy, asthma, and immunology because I feel like these patients cannot fully enjoy their daily lives. Their symptoms will always be lingering around and it’s up to us to help them. Minor changes can cause major improvements.

On my free time, I like to exercise, cook, and write poetry.


Kevin Nguyen, MPAS PA-C

Kevin Nguyen is a board-certified Physician Assistant, with experience in Emergency/Primary Care medicine, who joined Asthma and Allergy Center of Duncanville in 2020. Kevin is a graduate from AT Still University School of Osteopathic Medicine with a Master of Science in Physician Assistant Studies in 2019. Kevin is from Arlington, Texas, where he completed his Bachelor of Science at University of Texas at Arlington and Master of Public Health in Epidemiology at University of North Texas Health Science Center in Fort Worth, Texas.


Jesse Astorga, MPAS PA-C

Jesse Astorga is a board-certified Physician Assistant who joined Asthma and Allergy Center of Duncanville in 2020. He graduated from Louisiana State University Health Science Center with his Master of Physician Assistant Studies. He is a native Texan and completed his undergraduate degree in Biology at Texas Tech University. He decided to specialize in Allergy and Immunology to help patients improve their quality of life as he has first-hand experience of what it is like to battle with allergies since childhood. In his spare time, Jesse enjoys being outdoors, watching his favorite sports teams, and refining his culinary skills. Jesse looks forward to meeting you and your family!


Fanta Suwaneh, PA-C

I was born and raised in Gambia, West Africa. I came to the United States in 2009 to further my education, I attended Rust College in Mississippi and graduated with a Bachelor of Science in Biology. I also have a Master’s in Public Health from the University of Memphis. Prior to PA school, I worked as a Clinic Assistant at the Church Health Center in Memphis, TN. I also worked at the West Cancer Center as a Breast Cancer data analyst. I went to the University of Tennessee’s Health Science Center Physician Assistant program in Memphis, TN, and graduated in 2020.

I am passionate about helping people with allergies and asthma, as I myself and my son suffer from allergies and I know how they can affect our daily lives.

In my free time, I love traveling with my family, watching documentaries about different cultures, and watching food shows.

FAQs: What is a PA?

  • PA education and practice emphasize patient education, preventive care, and chronic care management. PAs’ generalist medical training enables them to provide a wide spectrum of patient care and treat the “whole patient.” PAs make it easier for patients to get the care they need when they need it.

  • PAs are medical professionals who diagnose illness, develop and manage treatment plans, prescribe medications, and often serve as a patient’s principal healthcare provider. With thousands of hours of medical training, PAs are versatile and collaborative. PAs practice in every state and in every medical setting and specialty, improving healthcare access and quality.

  • PAs are educated at the master’s degree level. There are more than 250 PA programs in the country, and admission is highly competitive, requiring a bachelor’s degree and completion of courses in basic and behavioral sciences as prerequisites. PA programs are approximately 27 months (three academic years) and include classroom instruction and more than 2,000 hours of clinical rotations.

  • A PA’s medical education and training are rigorous. The PA school curriculum is modeled on the medical school curriculum that involves both didactic and clinical education training. In the didactic phase, students take courses in basic medical sciences, behavioral sciences, and behavioral ethics. In the clinical phase, students complete more than 2,000 hours of clinical rotations in medical and surgical disciplines, including family medicine, internal medicine, obstetrics and gynecology, pediatrics, general surgery, emergency medicine, and psychiatry.

  • PAs’ specific duties depend on the setting in which they work, their level of experience, their specialty, and state laws. Generally, PAs can:

    • Take medical histories
    • Conduct physical exams
    • Diagnose and treat illness
    • Order and interpret tests
    • Develop treatment plans
    • Prescribe medication
    • Counsel on preventive care
    • Perform procedures
    • Assist in surgery
    • Make rounds in hospitals and nursing homes
    • Do clinical research
  • There are more than 123,000 PAs who practice in every medical setting in all 50 states and the District of Columbia. They work in hospitals, medical offices, community health centers, nursing homes, retail clinics, educational facilities, workplace clinics, and correctional institutions. PAs also serve in the nation’s uniformed services and work for other federal government agencies, such as the Department of Veterans Affairs.

  • PAs are committed to team practice with physicians and other healthcare providers. Currently, most state laws require PAs to have an agreement with a specific physician in order to

  • Yes. The PA profession is one of the fastest growing in the country. The U.S. Bureau of Labor Statistics projects that the profession will increase 37 percent from 2016 to 2026, significantly faster than the average for all occupations. The demand for PAs is so high that three-quarters of PAs receive multiple job offers upon graduation.

  • PAs are trusted healthcare The survey found that 93 percent regard PAs as trusted healthcare providers, and 91 percent believe that PAs improve the quality of healthcare.

  • At the practice level, there are likely more similarities than differences between PAs and NPs. However, there are two key differences:

    • PAs are educated in general medicine, which offers a comprehensive view of all aspects of medicine. NPs must choose a “population focus,” e.g., pediatric nurse practitioner or women’s health nurse practitioner.
    • PAs are trained to practice medicine using a curriculum modeled on medical school education. NPs are trained in the advanced practice of nursing.

Feel better, sooner.

Let our trained allergy providers help you and your family. Set an appointment with us today!

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