Dr. Tierno's work in the field of microbiology has resulted in numerous articles and texts that have been published in both medical and scientific journals and books, nationally and internationally. Articles written by Dr. Tierno have appeared in the American Journal of Public Health, Journal of Clinical Microbiology, American Journal of Clinical Pathology, Lancet, Reviews of Infectious Diseases, JAMA, Journal of Infectious Diseases, etc.

He is co-editor of a popular environmental book, "Staying Healthy in a Risky Environment", 1993 Simon & Shuster, NY. He has authored a popular book entitled "The Secret Life of Germs; Observations and Lessons from a Microbe Hunter" published by Pocket Books division of Simon & Shuster. His third book, for the public, was released in January 2002 "Protect Yourself Against Bioterriorism" also published by Pocket Books. In 2003 he coauthored "Nuclear, Chemical and Biological Protection" published by Lewis division of CRC Press. His latest book was published in 2004 by Atria division of Simon and Schuster entitled "Secret Life of Germs: What They Are, Why We Need Them, and How to Protect Ourselves Against Them."