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Introduction of Procalcitonin Procalcitonin (PCT) is a peptide precursor of the hormone calcitonin that is produced by various cells in the body, including the thyroid gland, lungs, liver, and intestines, in response to bacterial infections, sepsis, and systemic inflammation.  it is converted to calcitonin in the thyroid gland under normal physiological conditions, but during infections or inflammation, the production of procalcitonin is increased, and it is released into the bloodstream. In clinical practice, procalcitonin is used...

Introduction  Melanized fungi, also known as melanized or black yeasts, are a group of fungi that have the ability to produce melanin, a dark pigment that protects them from environmental stressors such as UV radiation and reactive oxygen species. They are found in a variety of environments, including soil, water, and air, and can also be found as commensal or pathogenic organisms in animals and humans. They are characterized by their unique cell wall structure, which...

Introduction of Leishman Stain Leishman stain is a type of Romanowsky stain that is commonly used in laboratory settings for staining blood smears, bone marrow, and other tissue samples for the identification of various blood cells and infectious agents. It was first introduced by a British physician named William Boog Leishman in 1901. The Leishman stain consists of a mixture of two stains, eosin and methylene blue, which are dissolved in methanol and glycerol. This combination...