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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.
Categories of Air Pollutants From the above list you can see that the air pollutants can be broadly classified into the following two categories: Primary Pollutants
what do primary tissues of a plant do
What is the Implant Placement The failure to place an implant in the correct location in the buccolingual plane, mesiodistal plane and the inciso cervical plane results in the
Because of developmental abnormality, the wall of left ventricle of an infant's heart is as thin as that of right ventricle. What would be its explicit effect on circulation of blo
how do mature sperm differ from those that are not fully developed
Crustose Lichen Stage - Xerarch On bare rocks, conditions are inhospitable for life, as there is extreme deficiency of water and nutrients, great exposure to sun, and extremes
Importance of water in the body Water is the most essential constituent of life. Life cannot exist without water. About 90% of water is present in protoplasm Water
Sublimation is the process by which solid water changes directly to vapour phase without passing through the intervening liquid phase. The gradual disappearance of flakes of ice
Q. What do you understand by Chromosome Behaviour? When we study meiosis. we not only observe the regularity of pairing which is important' for' the fertility of the plants, we
What is a burette and how is it used? A burette is a uniform-bore glass tube with fine gradations and a stopcock at the bottom, used particularly in laboratory procedures for a
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