Comparison between digital and optical microscopy: Analysis in a mouse gut inflammation model.

Virtual microscopy is currently widely used for various purposes, such as teaching, archiving, collaborations and research. Although the cost of this technique has reduced, it continues to be expensive for the majority of laboratories in developing countries. The Graduate Program in Pathology at the Federal Fluminense University (Niterói, Brazil) has acquired equipment for virtual microscopy. However, this novel method faced prejudice, as students and technicians were skeptical about its reliability. Thus, the aim of the current study was to evaluate whether virtual microscopy is a reliable method of analysis for our research. Thus, a mouse gut inflammation model developed by our research group was used in the present study. Analysis was performed using optical microscopy and digital imaging using the APERIO scanning system and the ImageScope® software. Intestinal epithelial cells (IECs), intra epithelial leucocytes (IEL), and villi number and area were evaluated. No significant differences were observed in villi number, IEC and IEL; however, the villi area was significantly smaller when measured using the computer. Thus, the present study indicates that virtual microscopy is a trustworthy method for research purposes.