Antibiotic Sensitivity disc are used to determine the effectivness of an antibiotic against a microorganism as a guide to antibiotic therapy. The disc consist of a specific concentration of an antibiotic in mcg which is tested against a microorganism of a standard density, swabbed uniformly on an appropriate media following overnight incubation. Neomycin is impregnated on a filter paper disc of specified concentration. Both sides of the disc are printed with N and concentration 30 mcg for easy identification.

Antibiotic Sensitivity disc are used to determine the effectivness of an antibiotic against a microorganism as a guide to antibiotic therapy. The disc consist of a specific concentration of an antibiotic in mcg which is tested against a microorganism of a standard density, swabbed uniformly on an appropriate media following overnight incubation. Cefazolin is impregnated on a filter paper disc of specified concentration. Both sides of the disc are printed with CZ and concentration 30mcg for easy identification.

Giemsa stain is a mixture of methylene blue, eosin, and azure B. It is specific for the phosphate groups of DNA and attaches itself to adenine-thymidine rich regions. It is a high contrast polychromatic stain. It is used as a standard stain for differential staining of blood and bone marrow smears. It stains different cells in different colour. Giemsa is commonly used stain for G-banding of chromosomes. In G-banding studies, heterochromatic region of chromosomes is stained dark(G-bands) with giemsa whereas euchromatic regions are stained light(R-bands). This helps in identification of chromosomal aberrations.