Alyssa Ammazzalorso, MD
Infectious Diseases
Accepting new patients
Sees patients age 18 and up
MacGregor Infection Medicine and Travel Program
Penn Medicine Provider

About me

  • Assistant Professor of Clinical Medicine (Infectious Diseases)

Education and training

  • Medical School: Albert Einstein College of Medicine
  • Residency: University of Pennsylvania Health System
  • Fellowship: University of Pennsylvania Health System

What my patients think about me

Average Rating

101 reviews

Comments are submitted by patients and reflect their views and opinions. The comments are not endorsed by and do not necessarily reflect the views of Penn Medicine.

November 2025
a great doctor.
September 2025
i feel quite confident in the management of my health care!
September 2025
dr. a is open minded and not opinionated. dr. a treats me like a person with a brain!!!!
August 2025
my doctor is terrific at her care with her patients! i think many of you're other doctors should do a day or week alongside doctor a so they too can take notes and copy and paste

Insurance accepted

My Locations

Penn Medicine hospital privileges

  • Hospital of the University of Pennsylvania: Has privileges to treat patients in the hospital.
  • Penn Presbyterian Medical Center: Has privileges to treat patients in the hospital.
Dr. Ammazzalorso is a Penn Medicine physician.

Qualifications and experience

Treatments and Conditions

My research

Vishnu S. Potluri, David Goldberg, Siqi Zhang, Douglas E. Schaubel, Miklos Z. Molnar, Rachel Forbes, Megan E. Sise, James L. Rogers, Vasanthi Balaraman, Anshul Bhalla, David Shaffer, Beatrice P. Concepcion, Raymond T. Chung, Ian A. Strohbehn, Shristi Mapchan, Vikas Vujjini, Akhila Sangadi, Eric Martin, Roy D. Bloom, Alyssa Ammazzalorso, Emily A. Blumberg, Peter P. Reese Risk of Cytomegalovirus Viremia Following Transplantation of Hepatitis C-Viremic Donor Kidneys Into Uninfected Recipients: A Multi-Center Retrospective Cohort Study , Transplant Infectious Disease, 27(3): 2025,e70011


Karla L. Valdes Morales MD, Marc Bornstein BA, PhD, Claire E. Hannah MD, Thomas Vazquez MD, Corinne Rauck MD, Olaf Rodriguez MD, Rosalie Elenitsas MD, Alyssa Ammazzalorso MD, Ilyas Sahrish MD, Blair C. Weikert MD, Emily Baumrin MD, Meera Sivendran MD, Amy Forrestel MD, Misha Rosenbach MD Cytomegalovirus anogenital ulcers in an immunosuppressed patient. , JAAD Case Reports, 28(65): 2025,112-115


Alyssa Ammazzalorso, M. Elle Saine, Judith O’Donnell, Leah Turner, Sarah Longworth, Blair Weikert, Emily Blumberg​ Sexually Transmitted Infections in Solid Organ Transplant Recipients , American Transplant Congress: 2024


Judith A. Anesi, Ebbing Lautenbach, Kerri A. Thom, Pranita D. Tamma, Emily A. Blumberg, Kevin Alby, Warren B. Bilker, Alissa Werzen, Alyssa Ammazzalorso, Pam Tolomeo, Jacqueline Omorogbe, Lisa Pineles, and Jennifer H. Han Clinical Outcomes and Risk Factors for Carbapenem-resistant Enterobacterales Bloodstream Infection in Solid Organ Transplant Recipients , Transplantation, 107(1): 2022,254-263


Alyssa Ammazzalorso, Jennifer Han, Ebbing Lautenbach, Pranita Tamma, Pranita Tamma, Kerri Thom, Kevin Alby, Emily A. Blumberg, Warren B. Bilker, Jacqueline Omorogbe, Pam Tolomeo, Alissa Werzen, and Judith A. Anesi Risk Factors for Subsequent Multidrug-Resistant Gram-Negative Bloodstream Infection Following an Initial Gram-Negative Bloodstream Infection among Solid Organ Transplant Recipients , IDWeek: 2021


Tracie A. Seimon, Samuel Ayebare, Robert Sekisambu, Emmanuel Muhindo, Guillain Mitamba, Eli Greenbaum, Michelle Menegon, Fabio Pupin, Denise McAloose, Alyssa Ammazzalorso, Danny Meirte, Wilbur Lukwago, Mathias Behangana, Anton Seimon, and Andrew J. Plumptre Assessing the Threat of Amphibian Chytrid Fungus in the Albertine Rift: Past, Present and Future , PLOS ONE, 10(12): 2015,e0145841


Alyssa D. Ammazzalorso, Christine P. Zolnik, Thomas J. Daniels, and Sergios-Orestis Kolokotronis To Beat or Not to Beat a Tick: Comparison of DNA Extraction Methods for Ticks (Ixodes scapularis) , PeerJ, 3(1): 2015,e1147


Alyssa Ammazzalorso, Christine Zolnik, and Sergios Kolokotronis The City Mouse and the Suburban Mouse: Urbanization and the Gut Microbiome of White-Footed Mice (Peromyscus leucopus) , Microbes in the City: Mapping the Urban Genome, The New York Academy of Sciences, New York 2015: 2015


Robert J. Ossiboff, Bonnie L. Raphael, Alyssa D. Ammazzalorso, Tracie A. Seimon, Alisa L. Newton, Tylis Y. Chang, Brian Zarate, Alison L. Whitlock, and Denise McAloose Three Novel Herpesviruses of Endangered Clemmys and Glyptemys Turtles , PLOS ONE, 10(4): 2015,e0122901


Robert J. Ossiboff, Bonnie L. Raphael, Alyssa D. Ammazzalorso, Tracie A. Seimon, Holly Niederriter, Brian Zarate, Alisa L. Newton, and Denise McAloose A Mycoplasma Species of Emydidae Turtles in the Northeastern USA , Journal of Wildlife Diseases, 51(2): 2015,466-470