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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.
Q. Are the extraembryonic membranes the same in all vertebrates? The presence of each extraembryonic membrane differs according to the vertebrate class. In amphibians and fi
Explain the Techniques of Culturing? In the last practical we learnt how to prepare culture media. This practical has been introduced to make you aware of the technique of sub-
Classification of lipids A general classification of lipids based on their structural components is presented in table. Such a classification, however, is possibly too rigid f
In the long term reversible causes of heart failure like valvular lesions, myocardial ischemia, uncontrolled hypertension, arrhythmias, alcohol, negative inotropic agents, intracar
Collection of Cerebro-spinal Fluid (CSF) Examination of the CSF is one of the most useful laboratory procedures in neurological diagnosis. Four types of punctures ma
Is there a difference between something that is alive and something that is a living organism?
what is he importance of proteins for living beings
While studying evolution, a student comes across a cladogram that includes clades like amphibia, reptilia, aves, and mammalia. What must be the basal clade?
Methods of Filter Feeding More elaborate methods of filter feeding are seen in tube dwelling polychaetes which use tentacles to entangle the food particles. Figure shows some
Energy and protein deficiencies Deficiencies of protein and energy are the most common nutrient deficiencies, which adversely affect production and performance of farm animals
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