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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.
Considering a pair of homologous chromosomes containing a gene having two different alleles how many different genotypes can the individual present? If a gene of the diploid sp
Explain Clinical analysis Clinical analysis: This analysis includes a complete physical examination and a medical history. The physical examination begins with the patient's
Transport of Gases in Blood We know that two types of gas exchanges are constantly occurring in the animal body--one at the inter phase of the respiratory membrane and externa
Eukaryote is the type of cell found in several organisms including single-celled protists and multicellular fungi, plants, and animals as well; characterized by a membrane-bounded
Cutaneous larva migrans Cutaneous larva migrans, also known as creeping eruption, creeping verminous dermatitis or serpiginous eruption, is caused by larvae of many nematodes, viz
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Explain radiation sterilization Various studies have been conducted which show the effect of processing on vitamins especially, thiamine. In one study, which compared the effec
What is the significance of torsion? An unusual twisting of the gastropod body which has left all members of class with an asymmetric body plan and a U-shaped alimentary tract,
Non-concomitant or Paralytic Squint This subdivision of manifest squint occurs when there is a deviation of the eye in different directions. The causes for non-concomitant squ
What is the climax stage of an ecological succession? The climax stage is the stage of the ecological succession in which the community of an ecosystem becomes stable and does
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