Etiology, Biology

Assignment Help:

Etiology
The 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.


Related Discussions:- Etiology

Structure of human spermatozoon, Structure of human spermatozoon: Na...

Structure of human spermatozoon: Nature: Human sperms are minute, microscopic and motile. Structure: Each sperm have an oval shaped head piece, a neck, a middle piece and

Explain composition of malt yeast peptone glucose medium, Explain Compositi...

Explain Composition of Malt Yeast Peptone Glucose Medium? Malt Extract - 3.0 gm Yeast Extract - 3.0 gm Peptone - 5.0 gm Glucose - 10.0 gm Agar - 15.0 gm Distille

What in genetics is hybridization, What in Genetics is hybridization? H...

What in Genetics is hybridization? Hybridization in Genetics is the crossing of individuals from "pure" and dissimilar lineages in relation to a given trait, i.e., the crossing

Gene interactions (post mendelian genetics), GENE INTERACTIONS (POST MENDEL...

GENE INTERACTIONS (POST MENDELIAN GENETICS) Phenotypic expression of a gene may be altered by the influence of other genes. The modification of the normal phenotype of certain

What proportion of children with down syndrome, What proportion of children...

What proportion of children with Down syndrome do you expect when women with down syndrome have children with men who have 46 chromosomes Justify your answer

Define morphallaxis, a) Describe with the help of a suitable example for ea...

a) Describe with the help of a suitable example for each of the following terms : (i) morphallaxis (ii) epimorphosis and (iii) compensatory regeneration.

Palaeobiology, Palaeobiology : This deals with the study of fossils and rem...

Palaeobiology : This deals with the study of fossils and remains an impressions of the past organisms found in the rock of different ages. Paleobiology is a growing or comparativel

What is a vesicle, What is a vesicle? A vesicle is a relatively minute ...

What is a vesicle? A vesicle is a relatively minute intracellular, membrane-enclosed sac that keeps or transports substances

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd