ZEISS Primostar is your microscope to visualize small structures down to 0.2 – 5 μm. So you can even observe objects such as the rod-shaped Mycobacterium tuberculosis. The gold standard for sputum smear microscopy is Ziehl-Neelsen staining and brightfield light microscopy. According to WHO1, LED fluorescence microscopy is even more sensitive and less time-consuming, making it a real alternative to the conventional standard.