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

What is the secondary structure of a protein, The secondary protein structu...

The secondary protein structure is produced by the manner its amino acids interact by intermolecular bond. These interactions make a spatial conformation of the polypeptide filamen

What is agar-agar, What is agar-agar? Agar-agar is a sulphonated mucopo...

What is agar-agar? Agar-agar is a sulphonated mucopolysaccharide containing mainly D-galactose, D-glucuronic acid and 3,6 anhydro L-galactose. It is derived from red sea weed e

Can you describe about mechanical digestion, Q. What is mechanical digestio...

Q. What is mechanical digestion? In molluscs, earthworms, arthropods, birds and vertebrates, in general, which organs respectively participate in this type of digestion? Mechan

What is diagnosis of heart disease in the newborn, What is Diagnosis of Hea...

What is Diagnosis of Heart Disease in the Newborn ? Clinical diagnosis of heart disease in the newborn can be quite challenging. Manifestations of potentially life threatening

Explain hepaticae, Hepaticae (Liverworts) The gametophyte is thalloid b...

Hepaticae (Liverworts) The gametophyte is thalloid body or simple stem and leaves, with aquatic or semi-terrestrial habit. Rhizoids are multiceillular. Some examples : Mar

Wet and dry thermal treatment, Wet and dry thermal treatment Wet therma...

Wet and dry thermal treatment Wet thermal treatment: it is based on exposure of shredded infectious waste to high temperature, high pressure steam. It is inappropriate for the

Coronal disassembly, Coronal disassembly - Coronal restoration in the ...

Coronal disassembly - Coronal restoration in the retreatment phase called coronal deassembling or disassemblying. - Coronal deassembling means removal of coronal and radi

Skeletal tissues - cartilage, SKELETA L TISSUES - These connective ...

SKELETA L TISSUES - These connective tissues form the endoskeleton of the vertebrates. These support the body, protect the various organs and help in locomotion. Skel

Why did scientists want to map the human genome, Why did scientists want to...

Why did scientists want to map the human genome? They wanted to learn the location of all the significant genes in the genome in order to learn how the genome is organized, ho

Explain glucocorticoids, Explain Glucocorticoids The adrenal cortex se...

Explain Glucocorticoids The adrenal cortex secretes the glucocorticoids which  increase gluconeogenesis by increasing hepatic intake of amino acids accompanied by increased ac

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