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EtiologyThe infectious agent of psittacosis - lymphogranuloma venerum trachoma group (PLVG) is an obligate intracellular parasite and is classified as separate genera with only 2 species, viz. Chlamydia trachomatis and Chlamydia psittacii. These organisms are the members of an exclusive order Chlamydiales under the family Chlamydiaceae. The organism resembles bacteria in the composition of the cell wall, as it possesses both RNA and DNA and also multiply by binary fission. However, unlike bacteria, this multiplication occurs only within the host cells. In this respect, like viruses the organism is intracellular and can only be propagated or multiply in living cells. The elementary bodies of chlamydia stain with basic dyes and are visible as small, round red coloured dots with the light microscope when stained by the methods of Machiavello or Gimenez or modified acid-fast techniques. Their colour is purple blue in Giemenez stained preparations and appear Gram negative in Gram’s stained preparations.
Nature of Metabolites in Sieve Tubes The phloem sap contains three major classes of organic compounds - organic acids, amino acids and sucrose besides some cations, anions and
Using copious sterile saline irrigation This can be delivered from a sterile infusion bag in a pressure cuff or a peristaltic pump. The drills can be adequately cooled by spray
Q. What are the classes of lipoproteins in the blood? Blood lipids (cholesterol, triglycerides and phospholipids) being insoluble in blood need a ship to travel in our body; it
Q. What are the three major limiting factors of photosynthesis? The three major limiting factors of photosynthesis process are light intensity, carbon dioxide temperature and c
Carbohydrates form the major bulk of human diet and are also the chief sources of energy. Carbohydrates are easily digested and broken down by enzyme action into glucose and are ea
Q. What is Phenylketonuria? The essential amino acid phenylketonuria is utilized for tissue protein synthesis and hydroxylated to form tyrosine. The hydroxylation reaction requ
Which of the following best explains mechanisms by which histones interact with DNA? A. Histone core proteins interact with the main groove of DNA by the helix-turn-helix-turn
Assume you were given a mixture consisting of one molecule each of all possible sequences of a smallish protein of molecular weight 4800 daltons. If the average molecular weight of
Cystic fibrosis (CF) is caused by a variety of mutations in the CFTR gene. Imagine you have identified a new single-base pair mutation (A→T) in an exon of the CFTR gene. You wish t
Nitrification - Nutrient Cycles Ammonia or ammonium salts, are converted into nitrate in a process termed nitrification to be useful to most autotrophic and heterotrophic orga
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