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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.
Types of Transport Process in Sieve Tubes The metabolites of all the mesophyll cells around the sieve elements join in a common pool to load via the surrounding transfer cells
Osmoregulation in Freshwater Metazoans Freshwater and brackish water animals that are live in hypoosmotic(of lower osmotic pressure) environment and keep a hyperosmotic (of h
What is a pigment? Scientifically, a chemical that can impart colour and is insoluble in the solvent in which it is used, is referred to as a 'pigment'. Well, you would agree
Define the Structure of Vitamins? For your convenience, however, we have given the structures of these vitamins here in the text. Look at Figure which illustrates the fat-solu
Rabies Rabies, a fatal zoonotic viral disease of dogs, cats, man and other mammals, causes an acute encephalomyelitis. The rabies virus belongs to the genus Lyssavirus in the
Are fruits always the flesh part of the "fruits"? Is the edible part of the onion a fruit? In some so-called fruits the actual fruit is not the flesh part. For instance, the fl
Explain Adverse effects of Atazanavir Atazanavir causes indirect hyperbilirubinemia. It has had no adverse effects on lipid profiles, but the drug's long-term effects are unkn
Define Freeze Concentration? This process has been known for many years and has been applied commercially to orange juice. However, high processing costs due largely to losses
The oldest fossils look as though they were formed by organisms that resemble modern?
Which disease is associated with the following symptoms? Sudden onset of profuse watery stool followed by vomiting, rapid dehydration and muscular cramps?
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