In 2018 he became professor emeritus at the Lewis Katz School of Medicine at Temple University.
An authority on the listeriosis bacterial infection in humans, he has been recognized for the quality of his clinical teaching and has received distinguished teacher awards from the Association of American Medical Colleges (2018) and the American College of Physicians (2013).
He also received a lifetime achievement award from the Infectious Diseases Society of America (2003).
He was president of the College of Physicians of Philadelphia between 2010 and 2012 and of the Anaerobe Society of the Americas between 2008 and 2010.