780th Monthly Meeting
September 21, 2020
100th Year Celebration of the Eastern PA Branch ASM
Speakers: James Poupard, Alan Evangelista, Irving Nachamkin, Sunny Shin, Michele Kutzler

781st Monthly Meeting
October 26, 2020
Joe Zackular, University of Pennsylvania
“Microbial cooperation enhances Clostridioides difficile pathogenesis”

782nd Monthly Meeting
November 23rd, 2020
Daniel Portnoy, UC Berkeley
“How intracellular pathogens sense their intracellular environment to activate virulence gene expression”

December 4th 2020
Infection and Immunity Forum

783rd Monthly Meeting
January 25th, 2021
John Mekalanos, Harvard Medical School
“Protein covariance networks reveal interactions important to the emergence of SARS coronaviruses as human pathogens“

784th Monthly Meeting
February 22nd, 2021
Isabell Coppens, Johns Hopkins
“Catching What You Eat: The Secret of the Intracellular Tenure of Toxoplasma gondii

785th Monthly Meeting
March 22nd , 2021
Invited speaker

786th Monthly Meeting
April 26th, 2021
Invited speaker

787th Monthly Meeting
May 24th, 2021
Student Chapter Sponsored Meeting
Student speakers at 4-5pm, Invited Speaker 5-6pm

788th Monthly Meeting
June 14th, 2021
Norman Willett Memorial Lecture
Amy Vollmer, Swarthmore College
“Microbiology: Nevertheless, We Persisted”
(Sponsored by the Education Committee)

Joseph Zackular, Ph.D.
Assistant Professor, Department of Pathology and Laboratory Medicine
University of Pennsylvania Perelman School of Medicine
Children’s Hospital of Philadelphia

Microbial cooperation enhances Clostridioides difficile pathogenesis

Clostridioides difficile is the most commonly reported nosocomial pathogen in the United States and an urgent public health threat worldwide. The primary risk factor for C. difficile infection of the gastrointestinal tract is antibiotic use, which reduces colonization resistance to C. difficile by perturbing the resident gut microbiota. Despite the well-established link between the gut microbiota and susceptibility to C. difficile infection, the impact of polymicrobial interactions on C. difficile pathogenesis is not well understood.  In this talk, we will explore the effect of microbial cooperation on C. difficile virulence and investigate the molecular mechanisms of cross talk between C. difficile and the gut microbiota.

Congratulations to the organizers, speakers and participants for a successful program celebrating our 100th anniversary of the Eastern PA Branch ASM.

Introduction to the Meeting by Branch President Dieter M. Schifferli, Ph.D., Dr.Med.Vet., DVM and ASM President Vic DiRita, Ph.D., and talk by branch member and archivist James Poupard PhD

History Antimicrobial Resistance by branch member Alan Evangelista Ph.D., and History of Diagnostics by branch member Irving Nachamkin DrPH, MPH

Legionnaires’ Disease by branch member Sunny Shin Ph.D. and History of Vaccine Development by branch member Michele Kutzler Ph.D.

Question and Answer Session and Closing with moderators Toby Eisenstein Ph.D. and Linda Miller, Ph.D.

Please join us for an afternoon of historical and scientific lectures (virtual) to celebrate 100 years of the Eastern Pennsylvania Branch of the American Society for Microbiology. The Eastern PA Branch can trace its origin to February 24, 1920. On this date, Dr David H Bergey invited a group of individuals interested in bacteriology and pathology to attend a meeting in his office on the second floor of the Laboratory of Hygiene, at the University of Pennsylvania (34th Street between Spruce and Walnut). The purpose of the meeting was to organize the Eastern Pennsylvania Chapter of the Society of American Bacteriologists.

Link to Live Meeting on YouTube


4:00 – 4:15 pm Opening Remarks
Dieter M. Schifferli, DVM, Dr Med Vet, Ph.D., University of Pennsylvania, EPAASM Branch President
Victor DiRita, Ph.D., Michigan State University, ASM President

4:15 – 4:45 pm Plenary: Highlights from our First 100 Years
James A. Poupard, Ph.D., Pharma Inst of Philadelphia
After a brief background of Bacteriology in Philadelphia prior to 1920, the 100-year history of our Eastern PA Branch will be presented in five identifiable periods starting in 1920 and culminating in 2020

4:45 – 5:10 pm The Historic and Current Threats of Increasing Antimicrobial Resistance
Alan T. Evangelista, Ph.D., D(ABMM), St. Christopher’s Hospital for Children
A brief review of the major mechanisms of antimicrobial resistance and a focus on key historic milestones in the development of resistance.  Recent changing epidemiologic patterns of multidrug resistance and current/future treatment options will be discussed

5:10 – 5:30 pm A Century of Diagnostic Microbiology Advances with Contributions by the Eastern PA Branch ASM
Irving Nachamkin, Dr.P.H., M.P.H., D(ABMM), FAAM, University of Pennsylvania
This talk will discuss various advances in clinical microbiology diagnostics over the past 100 years, highlighting the contributions of our Branch members

Dr. Nachamkin Bio: Irving Nachamkin is Professor of Pathology and Laboratory Medicine in the Perelman School of Medicine at the University of Pennsylvania.  He served as the 10th Director of the William Pepper Laboratory of Clinical Medicine, established in 1895 and the first clinical laboratory associated with an academic center, from 2009 to 2020.  He was also the Associate Director of the Clinical Microbiology Laboratory at the Hospital of the University of Pennsylvania from 1982-2020.  Dr Nachamkin has authored or co-authored over 225 peer-reviewed research publications,  reviews and edited several subspecialty books. He has been active with our local branch since the early 80’s and served as Branch President from 1999-2001.  Dr Nachamkin has also been actively involved with our national organization, serving on numerous committees, and was Editor-in-Chief of Clinical Microbiology Reviews from 2002-2012.  He has been recognized for his contributions by election to fellowship in the American Academy of Microbiology,  and is also a fellow of the Infectious Disease Society of America and fellow of the College of Physicians of Philadelphia. Dr. Nachamkin is currently on sabbatical leave and will retire from Penn as Emeritus Professor in January.  

5:30 – 5:50 pm Eavesdropping on Bacterial:Host Conversations: Lessions Learned from Legionnaires’ Disease
Sunny Shin, Ph.D, University of Pennsylvania
In the summer of 1976, an outbreak of a severe pneumonia termed Legionnaires’ Disease occurred among attendees of a Philadelphia convention of the American Legion. This outbreak led to the discovery of the bacterium Legionella pneumophila. Since then, Legionella are now widely recognized as an important cause of community-acquired pneumonia. Legionella has also become a model pathogen studied by many research labs around the world, including several of our branch members. This talk will provide a brief overview of Legionella and highlight the fundamental insights into host cell biology and immunology that have been learned from the study of Legionella

Dr. Shin Bio: Sunny Shin is an Associate Professor in the Department of Microbiology at the University of Pennsylvania Perelman School of Medicine. She received her BS in Biology from MIT, her PhD in Microbiology and Immunology from Stanford University School of Medicine, and her postdoctoral training in the Department of Microbial Pathogenesis at Yale University School of Medicine. Her research program encompasses the fields of bacterial pathogenesis and innate immunity, with a focus on the bacterial pathogens Legionella pneumophila, Coxiella burnetii, and Salmonella Typhimurium. Her laboratory is supported in part by the National Institutes of Health and a Burroughs-Wellcome Fund Investigators in the Pathogenesis of Infectious Diseases Award.

5:50 – 6:10 pm Philadelphia’s Rich History in Vaccine Research and Development: from Empirical Approaches to Advanced Technologies
Michele A. Kutzler, Ph.D., Drexel University School of Medicine
Philadelphia’s rich history of vaccine development stretches back to the 1960s, and many of its highlights came under the direction of collaborating scientists and physicians at institutions and pharma across the city and its suburbs.  This short overview will highlight many of the advances moving from historical empirical approaches to more advanced technologies using recombinant strategies.  Philadelphia left a formidable imprint on vaccine development in the 20th century leading the world forward into the 21st century

6:10 – 7:00 pm Question and Answers and Closing Remarks
Toby Eisenstein, Ph.D., Temple University
Linda Miller, Ph.D., CMID Pharma Consulting, LLC