“…General output characteristics of speckle microscope have been studied (26). It is important to note that very recently speckle-microscopy has been applied (27)(28)(29) in the investigation of a unique biological object -Chlamydia trachomatis (CT), the causative agent of chlamydial genital infection that is known as one of the greatest challenges for both Public Human and Animal Health worldwide. A specific feature of these bacterial cells is that they can live only inside other mammalian cells of larger size, for example epithelial cells.…”