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

Uses of grafting, Uses of Grafting Grafting helps to preserve and pe...

Uses of Grafting Grafting helps to preserve and perpetuate varieties that cannot reproduce by vegetative method. Grafting changes less useful varieties to more desirable

Which type of genetic disease can be identified, Which type of genetic dise...

Which type of genetic disease can be identified from the visual analysis of the number of chromosomes present in a karyotype? The counting and identification of chromosomes in

Function of promoter in transcription, Problem 1: How many different ty...

Problem 1: How many different types of RNAs are present? What is the function of Promoter in Transcription? Mention different types of RNAs Discuss function of Promot

Pomology, Pomology :  This is the study of fruits and fruit yielding plants...

Pomology :  This is the study of fruits and fruit yielding plants of commercial importance.  Pomology is a branch of botany which studies or cultivates pome fruit, and particularly

What are stomata, What are stomata? How do these structures participate in ...

What are stomata? How do these structures participate in the plant transpiration? Stomata (singular, stoma) are small specialized passages for water and gases there in the epid

Classification of animal world, plz give the classificational chart of anim...

plz give the classificational chart of animals upto speceis level

Transmissible gastroenteritis of swine, Transmissible gastroenteritis of sw...

Transmissible gastroenteritis of swine The disease, first reported from the USA in 1964, is caused by antigenic group 1 mamalian coronavirus, a member of genus Coronavirus of

Eye - conjuctiva, CONJUNCTI V A - Ectodermal in origin. Formed by epi...

CONJUNCTI V A - Ectodermal in origin. Formed by epidermis. It is thin, transparent covers cornea. Made up of stratified epithelium. It has 2 parts - (i) Ocular conjunct

Effects of cardiogenic pulmonary edema, Effects of Cardiogenic Pulmonary Ed...

Effects of Cardiogenic Pulmonary Edema Interference with oxygen transfer in the lungs Depression arterial oxygen tension Sense of suffocation and oppression in the

What is the typical localization of the tropical forests, What is the typic...

What is the typical localization of the tropical forests regarding latitude? Tropical rain forests, as the Amazon forest and the Congo forest, are typically located in low lati

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