Chlamydiosis-pathogenesis, Biology

Assignment Help:

Pathogenesis


The mode of intracellular replication of chlamydial agents is investigated morphologically and cytochemically with both light and electron microscope. It is established that the small infectious chlamydial cell retains its identity after cellular uptake in a cytoplasmic vesicle derived from the cellular membrane. Inside these vesicles the chlamydial cell is reorganised into a form known as reticulate bodies. These large cells are noninfectious, grow and multiply by binary fission. During a second process of reorganization small dense centered cells assumes infectivity but they do not divide. These small cells are released from the cytoplasm, which are known as inclusions, which are highly resistant to extra cellular environment and have the capacity of infecting the host cells. A well-balanced host-parasite relationship represents the common nature of chlamydial infections. Exceptionally, some animals may experience severe or fetal disease as a result of exposure to chlamydia. The long lasting inapparent or latent state has been reported in several species and in some cases the organisms are excreted but the latently infected animals while in others the organisms are remained in a non-infectious form. Under the conditions of stress, the carrier animals may shed organisms in large numbers and resulted into clinical disease. The intestinal tract is the natural habitat for chlamydiae and fecal shedding is the most important mode of transmission. Chlamydiae multiply within the cells of the reticulo-endothelial system, epithelial cells, synoviocytes and the cells of placenta and fetus. Lesions produced depend upon the virulence of the causative strain. The disease syndromes observed reflects the route of infection and the immune competence of the host animal.


Related Discussions:- Chlamydiosis-pathogenesis

Describe the significance of micronucleus., Describe the significance of mi...

Describe the significance of micronucleus. One of two types of dimorphic nuclei found in ciliate protozoans. The single micronucleus contains only one copy of the genome and is

Ooplasmic determinants and somatic cell determination, Ooplasmic Determinan...

Ooplasmic Determinants and Somatic Cell Determination Eggs of tunicates go through typically mosaic development in which the various blastomeres become determined to follow th

Haemolysis-complications of prosthetic valves, Haemolysis :  Mechanical va...

Haemolysis :  Mechanical valves, bioprosthetic valves as well as valves repaired with annuloplasty rings may cause haemolysis and related anaemia. This is more common when there i

What was the case of phineas gage, What was the case of Phineas Gage S...

What was the case of Phineas Gage Some Procedures are not used experimentally on humans, but sometimes brain tissue is ablated for medical reasons such as the excision of tumo

How is the nervous system characterized, Q. How is the nervous system chara...

Q. How is the nervous system characterized in beings of the phylum Annelida? How can one compare cephalization in annelids to cephalization in platyhelminthes and nematodes? An

How coacervates have facilitated emergence of life on earth, How could coac...

How could coacervates have facilitated the emergence of life on earth? Coacervates probably provided a nitid separation between an internal and an external environment and thus

Classification, what is the mode of nutrition in fungi?

what is the mode of nutrition in fungi?

Acid rain, what are the two main pollutants that contribute to acid rain

what are the two main pollutants that contribute to acid rain

Are organic solvents like benzene and ether polar, Are organic solvents lik...

Are organic solvents like benzene and ether polar or non-polar substances? Benzene and the ethers are molecules without electrically charged portions and therefore they are non

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