Calcofluor-white Calcofluor-white Calcofluor-white is a special fluorescent stain that binds strongly to structures containing cellulose and chitin. In plant cell biology research, it is used for the staining of cell walls of both algae and higher plants. It is also useful in medicine and animal biology for the identification of fungi in the tissue, (it binds to the chitin in the cell walls of the fungi). In research, calcofluor-white is also used to stain bud scars of yeast cells because the bud scars have a higher content of chitin, which stains them more than the rest of the cell membrane. Due
Beta-glucan negative test does not rule out infection. False positives may occur because of fungal contaminants in the antibiotics amoxicillin-clavulanate, and piperacillin/tazobactam. False positives can also occur with contamination of clinical specimens with the bacteria "Streptococcus pneumoniae", "Pseudomonas aeruginosa", and "Alcaligenes faecalis", which also produce (1→3)β--glucan. This test can aid in the detection of Aspergillus, Candida, and Pneumocystis jirovecii. This test cannot be used to detect Mucor or Rhizopus, the fungi responsible for mucormycosis, as they do not produce (1,3)-beta--glucan. Beta-glucan β-Glucans (beta-glucans) comprise a group of β--glucose polysaccharides naturally occurring in the cell walls of cereals, bacteria, and fungi, with