It is not visible without special stains.

This includes cameras, microscopes, and special stains.

Sometimes special stains are also done.

Additionally, mycobacteria frequently require special stains and culture methods that make their detection difficult.

Chromosome analysis using a karyotype involves special stains that generate light and dark bands, allowing identification of each chromosome under a microscope.

Furthermore, special stains and studies of the patient's tissues revealed no evidence of malignancy or infection.

Zakowski began the familiar and painstaking process of examining the cells, which had been treated with special stains, to look for clues to their identity.

Pathologists have a variety of special stains, such as "immunohistochemistry" at their disposal in difficult cases.

In all of these biopsy specimens special stains for organisms (fungi, acid and alcohol-fast bacilli, etc) were negative.

This bacterium can be detected with special stains, such as the Dieterle stain.