Gram - negative bacteria, Biology

Assignment Help:

Organisms of the so-called HACEK group, (Haemophilus, Actinobacillus actinomycetemcomitans, Cardiobacterium hominis, Eikenella species, Kingella kingae) which are part of the upper respiratory tract and oropharyngeal flora, infect abnormal cardiac valves, causing subacute NVE and cause PVE that occurs a year or more after valve surgery. In NVE, the HACEK organisms have been associated with large vegetations and a high incidence of systemic emboli. These organisms are fastidious and slow growing; when they are suspected, blood cultures should be incubated for 3 weeks. P. Aeruginosa is the gram-negative bacillus that most commonly causes endocarditis. Pseudomonal IE involves normal and abnormal valves on both sides of the heart and often causes valve destruction and heart failure.

The rickettsia C. burnetii infects humans after inhalation of desiccated materials from infected animals or contact with infected parturient animals. At variable intervals after acute infection by C. burnetii (Q. fever), persons with abnormal mitral or aortic valves who have not been able to eradicate the organism develop subacute IE with typical manifestations and often with valve dysfunction causing heart failure. The diagnosis is typically based on high IgG and IgA antibody titers to phase I C. burnetii antigens.


Related Discussions:- Gram - negative bacteria

Codex code of practice, Codex code of practice Codex Alimentarious Comm...

Codex code of practice Codex Alimentarious Commission (CAD) was established in 1963 with the objective to develop International Food Safety Standards to protect human health, w

Mycoplasmosi, MYCOPLASMOSIS Mycoplasma organisms are the smallest free li...

MYCOPLASMOSIS Mycoplasma organisms are the smallest free living, lack of cell-wall and bounded by a triple layer of plasma membrane. The organisms are pleuomorphic in shape, viz.

What is reaction specificity, Reaction specificity Some  enzymes  catal...

Reaction specificity Some  enzymes  catalyze only one  reaction  acting  on  a specific substrate. Example: urease  and  catalase  acts  only  on  urea and  hydrogen peroxide,

What is the main moral problem about the cloning, What is the main moral pr...

What is the main moral problem about the cloning of human individuals? Besides biological perils, a very serious moral problem includes the nucleus transplantation technology c

Explain angiosperms and flowering plants, Q. What are the angiosperms, the ...

Q. What are the angiosperms, the flowering plants? What is the major feature that distinguishes them from the gymnosperms? Flowering plants have seeds and flowers (phanerogamic

Explain adverse effects of interferon alfa, Adverse Effects Of interferon a...

Adverse Effects Of interferon alfa Intramuscular or subcutaneous injection of interferon is commonly associated with an influenza-like syndrome, especially during the first wee

Explain the term lipids, Explain the term Lipids? If somebody discovers...

Explain the term Lipids? If somebody discovers that you have some knowledge of nutrition, you will be promptly shooted with two questions, first, "Oh! You really can tell how m

Method of dna techonology tp improve lives of humans, List three ways that ...

List three ways that DNA technology could be used to improve the lives of humans. Answers could include: identifying human remains, determining a person's paternity, tracing h

Hassan, function of epithelial tissue

function of epithelial tissue

Material - separation of amino acid by paper chromatography, Determine Mate...

Determine Materials for Separation of Amino Acids by Paper Chromatography? Petridishes (200 mm diameter) with lid, Whatman Chromatographic paper, brown paper, 500 ml separating

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