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Virus Inclusion Body Stain (Modified macchiavello method) Baso Clear Colourful Stains
Testing Principle
Viruses are non-cellular microorganisms composed mainly of nucleic
acids and proteins. They can only replicate within living cells,
are extremely small in size (10–30 nm in diameter), and can pass
through bacterial filters. In cells infected by certain viruses,
round or irregular bodies of varying sizes and quantities, known as
viral inclusion bodies, can be observed under a light microscope.
RNA viruses typically form cytoplasmic inclusion bodies, while DNA
viruses form nuclear inclusion bodies. Some viral inclusion bodies
that are difficult to observe usually require special staining
methods for confirmation. The modified Macchiavello method uses
basic fuchsin and methylene blue for staining, which provides good
coloration for RNA coronavirus inclusion bodies. Basic fuchsin
readily binds to eosinophilic inclusion bodies in the cytoplasm,
staining them red. Differentiation with an acidic solution
effectively removes non-specific staining from other tissue
components. Methylene blue counterstains the background blue.
Stain Results
RNA viral inclusion bodies: Appear red within the cytoplasm of lung tissue cells.
Red blood cells: Appear pink or purplish-blue.
Fibrin exudates: Appear light pink.
Cell nuclei and connective tissue: Appear blue.
Packaging Specification
Product Name | Ref # | Specification |
Virus Inclusion Body Stain (Modified macchiavello method) | BA4358 | 6x20ml |