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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.
CONNECTIV E TISSUE Connective tissues are formed by the mesoderm of the embryo. Three components are present in the connective tissues- (i) intercellular medium
Theca - body form Protozoans It is a close-fitting hard structure around the plasma membrane, mainly composed of cellulose. It can be compared with the ceil wall of a plant ce
a) Explain obsessive-compulsive disorder? How is it dissimilar from borderline personality disorder? What are the two most common obsessions that affect adolescents?
Minor Criteria These are arthralgia, fever, prolonged PR interval, raised ESR and C-reactive protein levels. In some cases abdominal pain and epistaxis may occur. Other non spec
FUNCTION S OF POLYSACCHARIDES Chitin is a structural component of fungal cell wall and exoskeleton of insects, crustaceans and some other arthropods. Peptidoglycan o
Q. What are intraspecific and interspecific ecological interactions? The Intraspecific ecological interactions are those between individuals of the similar species. The Intersp
Q. Of which type of defense cell do worm infections stimulate the multiplication? The main leukocytes that generally participate and multiply in the defense against worm infect
What is the function of the myelin sheath? Do all axons present a myelin sheath? The function of the myelin sheath is to get better the safety and speed of the neural impulse t
"Diversity is good" is one of the axioms of conservation biology. However in absentia of historical information, why is noting higher diversity in a system NOT the best way to eval
Q. What do you mean by Congenital Long QT Syndrome? There is a rare group of young patients who suddenly pass out due to a spontaneous ventricular tachycardia and often have fa
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