Cellular microbiology is a branch of microbiology that combines cell biology and microbiology. Cellular microbiology aims to use pathogenic microbes as tools for cell biology research, as well as to use cell biology methodologies to better understand microorganism pathogenicity. Microbe toxins and virulence factors have been utilized to influence and research eukaryotic cell processes for decades. It's becoming clear that putting a purified toxin on a cell doesn't necessarily give you the whole picture, and that knowing the toxin's role in pathogenicity, how it promotes the microbe, how it's made, and the co-evolution of the toxin and its host-cell counterparts is critical.
In the medical field, cytology is a frequent tool for determining a diagnosis. Cytology examinations analyse specific types of cells using small volumes of biological tissue or fluid. Cytology tests can be used to examine practically any part of your body. In contrast to histology, which is the study of complete human tissue, cytology is the study of individual cells in the body. In strict terms, cytology is the study of normal cells, while cytopathology is the examination of cells in the setting of disease.