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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.
What is Ascending Aortic Aneurysm ? Ascending Aortic Aneurysm : In aneurysms confined to ascending aorta well below the innominate artery origin, the technique used is
Diploidy and Haploidy :: In the chromosomal complement given species not all the chromosomes are different from each other .In fact these are in pairs ,i.e. every two chrom
Mental Health For physiological health & social status, it is necessary to maintain mental health. Mental illness is characterised by - Depression Insomnia Exces
Types of individuals in Cnidaria There are two forms of individuals in Cnidaria: Polyp Medusa Polyp is tubular, the oral end being free carrying
What are the economic importance of colenterata
What is the Senses explain their Vision ? Vision : The human eye consists of structures which evolved together to focus light on a sensitive area called the retina. Light f
Gastropods - Feeding and Digestion in Molluscs In several gastropods the digestion is extracellular. Though, some herbivore gastropods like Crepidula are ciliary feeders and h
Explain Conventional Factors ? Smoking, Hypertension, diabetes mellitus, obesity, hypercholesterolemia, and reduced physical activity are considered as conventional risk factor
How is gas exchange done in flatworms? Platyhelminthes exchange gases exclusively by diffusion by their body surface. This is only possible because all cells are localized rela
Chemical Stress - Nature of the solutes The acidic or basic reaction of soil and water of a particular habitat reflects its geochemical history beginning with its formation an
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