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Explain Counter Stain - Ziehl-Neelsen Method?
Methylene blue is used to stain previously decolourized cells. All non acid-fast bacteria de-stained by acid alcohol now absorbs counter stain and takes on its blue colour. All acid-fast bacteria remained red in colour due to primary stain.
Genus Mycobacterium shows acid fastness. These are aerobic, slightly curved or straight rods that sometimes branch or form filaments. These filaments readily break down into rods and coccoid bodies, when disturbed. Some grow very slowly. Some are free-living saprophytes and some are pathogens, e.g. M. bovis could cause tuberculosis in cattles, M. tuberculosis causes tuberculosis in humans, M leprae causes leprosy in humans. Acid-fast stain has a diagnostic value in identifying these pathogenic mycobacteria.
Explain about the Sugaring - methods of food processing? Water is withdrawn from the microbial cells when they are placed in a strong sugar solution (about 68%) and thus result
Regression of Primitive Streak As the inward migration of cells by the primitive streak ends progressively along its anterior to posterior regions the streak slowly regre
Define Recommended Dietary Allowances for Vitamin D? The recommendations of vitamin D are expressed as IU. 1 IU is defined as the activity contained in 0.025 mcg of cholecalci
QUESTIONS: Write an analysis of the Chapter Twelve, the concluding chapter in ROLL AWAY THE STONE. It will be worth UP TO 50 points if you do it well. Submit it through the "Ex
Q. What is the life cycle of Trypanosoma cruzi? The Trypanosoma cruzi is a heteroxenous parasite that is it has an intermediate host, the triatomine bug, and a definitive host,
Q. How to check Quality of grains? Food grains for human consumption are whole or broken kernels of cereals, millets and pulses. According to PFA, they shall be free from added
What is a distilling flask and how is it used? A distilling flask is a round bottom flask that often has two openings, and some of them have a long neck.
Arboriculture : It deals with the cultivation of ornamental plants. Arboriculture is the cultivation, management or study of individual shrubs, trees, vines, or other perennial woo
Q. Etiological factor of lactose intolerance? These diseases are referred to as idiopathic (cause unknown) and though the possible mechanism suggested includes genetic factors,
Objective of the Radiographic Technique The ball bearings are opaque and their diameter have to be measured with the help of vernier caliper prior to use. (2 to 5 mm diameter b
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