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 deoxynivalenol, Q. What is Deoxynivalenol? Deoxynivalenol (DON)...

Q. What is Deoxynivalenol? Deoxynivalenol (DON) is a far more common, but much less toxic, trichothecene and is produced by species such as F. graminearum and F. culmorum. LD

Temporary partial disability - injury from an accident, Temporary Partial D...

Temporary Partial Disability - Injury from an Accident Such types of injuries which are easily recoverable and may not incapacitate the victim to perform duty apart from for

Oogenesis., write breif notes on oogenesis

write breif notes on oogenesis

Biochemical reactions - nitrate assimilation, Biochemical Reactions - Nitra...

Biochemical Reactions - Nitrate Assimilation Nitrate is the most readily available and preferred source of nitrogen for growth. Assimilatory reduction of NO - 3 to NH 3 is

Law of Minimun, What are the examples of Law of Minimum?

What are the examples of Law of Minimum?

What are the grasslands of north and south america, What are the grasslands...

What are the grasslands of North America and of South America respectively called? The steppe the grasslands of North America are called as prairies . The grasslands of South

Define deficiency and toxicity of vitamin d, Define Deficiency and Toxicity...

Define Deficiency and Toxicity of Vitamin D? Infants constitute a population at-risk for vitamin D deficiency because of relatively large vitamin D needs brought about by their

Cyanmethaemoglobin standard - haemoglobin content in blood, Define Cyanmeth...

Define Cyanmethaemoglobin Standard - Haemoglobin Content in Blood? Certified standard haemoglobin solution may be obtained from certified or reputed laboratory supply firms. St

What are herbicide tolerant crops in ecological, What are Herbicide toleran...

What are Herbicide tolerant crops in ecological Herbicide tolerant crops (HTC)  Ecological  a)  Increased use of the herbicides that plant is  tolerant to (describes ecologi

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