Primary tubercle, Biology

Assignment Help:

Primary  Tubercle  (Ghon Tubercle):

When  an  individual with  no  previous exposure  to  tuberclosis inhale a sufficient number of  tubercle bacilli into the alveoli, tuberculosis infection occurs. Inflammation occurs within the parenchyma of  the  lungs. Body  counteracts  the infection with  the natural  body defenses. Lymph  nodes in  the  hilar region  of the  lung become  enlarged as  they  filter drainage  form  the  infected site. The inflammatroy process and cellular reaction produce a small, firm white  nodule called  the  primary tubercle.

Calcifid Nodule  or Chon Tubercle:

The center of the primary tubercles contains tubercle bacilli. Cells gather around the center, and usually the outer portion becomes fibrosed. As blood vessels get compressed interfering with nutrition of  the tubercle, necrosis occurs at the center.


The area becomes walled off by fibrotic tissue around the outside, and the center gradually becomes soft and cheesy in consistency. This process is known as caseation necrosis. This material may become calcified (Ghon tubercle). Most people who are exposed  to tuberculosis and develop infection do not have active tuberculosis. X-ray shows the calcified nodule. The hilar lymph nodes and a Ghon tubercle seen is X-ray is referred as the primary complex. Person who have primary complex will show positive result inobatin  test. However a nurse needs to explain to the clients that a positive tuberculin test does not mean that helshe has tuberculosis. Body's reaction to  the organism. A person who has been unless with tubercle bacilli harbours the organism for the remainder of he person's  life unless he or she has received prophylactic isonizid. When a person is under physical or emotional stress, the bacilli lying dormant in the lungs become active. 


Related Discussions:- Primary tubercle

Taxonmy, classification on taxonomy

classification on taxonomy

Enumerate the sizes of eukaryotic and prokaryotic cells, Enumerate the Siz...

Enumerate the Sizes and shapes of eukaryotic and prokaryotic cells It is thus possible, due to these similarities, to generalise about the structures and functions of cells. In

What is the drug permeability across the cornea, What is the drug permeabil...

What is the drug permeability across the cornea? Drug permeability across the cornea depends onto: a. Lipid and water solubility of the drug b. Molecular size, weight and

Regulation of cholesterol biosynthesis, Cholesterol can be gained either fr...

Cholesterol can be gained either from the diet or it can be synthesized de novo, mainly in the liver. Cholesterol is transported round the body in lipoprotein particles. The rate

Explain food intolerances, Food Intolerances Food Intolerances:  The in...

Food Intolerances Food Intolerances:  The intolerances of  the patient for specific food  items must be assessed. For example,  milk may lead  to diarrhoea  in some people whil

Meaning of behaviour change communication, Meaning of Behaviour Change Comm...

Meaning of Behaviour Change Communication Now day's very common term used for giving health education to people and for giving information to bring change in behaviour is Behav

Explain enzyme glutamate oxaloacetate, Enzyme  glutamate oxaloacetate tran...

Enzyme  glutamate oxaloacetate transaminase catalyzes  the  reaction between glutamate and oxaloacetate with the formation of a-ketoglutarate and aspartate due to transfer  of one

What is blood typing, What is blood typing? Blood typing is the determi...

What is blood typing? Blood typing is the determination, by means of tests, of the categorization of a blood sample concerning blood group systems (specially the ABO system and

Zoology, #question.characteristics of coelenterata?.

#question.characteristics of coelenterata?.

Animal Respiration, What type of respiration does earthworm has ? In many c...

What type of respiration does earthworm has ? In many complex animals, the cells of internal organs are distant from the outside environment; respiratory systems provide the passag

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