Sampling Bacterial DNA on Household Surfaces (image) North Carolina State University Share Print E-Mail Caption For the NC State study, citizen scientists in 40 homes sampled nine common surfaces to help researchers determine what kinds of bacteria lived there, and in what relative numbers. Here, one of the citizen scientists is sampling the surface of a cutting board. Credit Holly Menninger, North Carolina State University Usage Restrictions Photo credit must be given. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.