What is the meaning of caseous?
ca·se·ous (kā'sē-ŭs), Pertaining to or manifesting the gross and microscopic features of tissue affected by caseation. Farlex Partner Medical Dictionary © Farlex 2012
What is caseous necrosis?
Caseous necrosis is a type of cellular death that occurs in tissues. Caseous means “cheese-like” and describes the crumbly, white appearance of the tissue after it dies. Cleveland Clinic is a non-profit academic medical center. Advertising on our site helps support our mission. We do not endorse non-Cleveland Clinic products or services. Policy
What is caseous degeneration?
Caseous necrosis or caseous degeneration[1] (/ˈkeɪsiəs/)[2] is a unique form of cell death in which the tissue maintains a cheese-like appearance.[3] It is also a distinctive form of coagulative necrosis.[4] The dead tissue appears as a soft and white proteinaceous dead cell mass.
What are the characteristics of caseous particles?
Caseous particles containing immense numbers of the bacilli are common. Its most abundant principles are cream, caseous matter or curd, and whey. Examine material from any caseous glands microscopically and inoculate freely on to Dorset's egg medium. On examination at the operation,...
What is the definition of caseous?
Caseous: Cheeselike. In caseous lymphadenitis, the lymph nodes turn into a soft, dry, crumbly mass resembling cheese, usually due to tuberculosis or a related infection. From caseum, the Latin word for cheese.
What is Caseating material?
Degeneration of dead tissue into a cheese like material. Caseation was a common feature of TUBERCULOSIS of the lungs and led to cavity formation. Also known as caseous degeneration.
What is caseous tuberculosis?
The caseous necrosis is the basic process of tuberculosis disease in humans. The interval from infection to tuberculin conversion is never more than 8 weeks and in general is 5 to 7 weeks (21). The onset of caseous necrosis coincides with the development of acquired immune resistance or CMI and DTH.
What are caseous lesions?
Caseous lesions consist of necrotic cellular debris surrounded by a zone of suppurative inflammation. Depending on the duration of the lesions, they may be partially encapsulated by fibrous tissue.
What causes Caseating?
Caseous necrosis is caused by different infections in your body. When this happens, your body's immune system responds to the infection, sometimes leading to necrosis, including caseous necrosis. In caseous necrosis, the invaders are usually bacteria or fungi.
Is TB Caseating or Noncaseating?
Both TB and sarcoidosis are granulomatous diseases; TB is characterized by caseating granulomas, whereas sarcoidosis is characterized by noncaseating granulomas.
What is caseous pneumonia?
Caseous pneumonia is a clinical X-ray form of infiltrative TB or a complication of the acute progression of fibro-cavitary TB. Aim of stady is evaluation of features and treatment outcome in CP. A retrospective study included 95 patients with CP.
What is caseous granuloma?
Caseating granuloma means necrosis involving dead cells with no nuclei and debris. Without microscope, the cheese like pattern was seen in the these granulomas . In all reports of the CREMO patients, the granulomas were noncaseating .
What is non Caseating?
Medical Definition of noncaseating : not exhibiting caseation noncaseating granulomas.
Can humans get CL from goats?
Though there have been documented cases of CL transmission to people from infected goats and sheep, the incidence is rare. Wear gloves when handling affected animals and avoid direct contact with any abscess drainage. Employ good hand-washing and other preventative/decontamination measures to prevent human infection.
What animals can get CL?
Although CL is typically considered a disease of sheep and goats, it also occurs more sporadically in horses, cattle, camelids, swine, wild ruminants, fowl, and people. Because of its zoonotic potential, care should be taken when handling infected animals or purulent exudate from active, draining lesions.
Which disease has the cheeselike physical effects of caseation?
Pathology. having the cheeselike physical effects of caseation: Patients in the new tuberculosis drug trial had hard-to-treat caseous lesions in their lungs.
Is canker a caseous material?
The caseous material of canker is also present, as is a disposition to hypertrophy of the exposed sensitive structures.
What does the word "caseous" mean?
Etymology. The word caseous means 'pertaining or related to cheese ', and comes from the Latin word caseus 'cheese'. Necrosis refers to the fact that cells do not die in a programmed and orderly way as in apoptosis .
What is a histological specimen?
Histological specimens are normally obtained from supraclavicular lymph nodes to demonstrate caseous necrosis. Caseous necrosis or caseous degeneration ( / ˈkeɪsiəs /) is a unique form of cell death in which the tissue maintains a cheese-like appearance. It is also a distinctive form of coagulative necrosis.
Is tan granulomas a caseous necrosis?
However, in the lung, extensive caseous necrosis with confluent cheesy tan granulomas is typical. The tissue destruction is so extensive that there are areas of cavitation (also known as cystic spaces). See Ghon's complex .
What is the difference between caseating and noncaseating granulomas?
The key difference between caseating and noncaseating granulomas is that caseating granuloma has a whitish, cheese like debris at the center whereas noncaseating granuloma has no such center that has undergone necrosis. Granulomatous inflammation is one aspect of the chronic inflammatory response where our body attempts to prevent the spread ...
What is a Caseating Granuloma?
The necrotic materials at the center have a cheesy white appearance. A caseating granuloma is a granuloma with such a center that has undergone caseous necrosis.
What is the vernix emulsified by?
Soon enough, part of the vernix is emulsified by increasing concentrations of pulmonary surfactants and desiccates, only to be consumed by the fetus; a corresponding increase in amniotic fluid turbidity is noticed.
What is the composition of Vernix?
Vernix has a highly variable makeup but is primarily composed of sebum, cells that have sloughed off the fetus's skin and shed lanugo hair. Chemically, it is water (80%), lipids (10%) and proteins (10%). The lipids include ceramides, cholesterol, fatty acids, triglycerides, waxes and sterol esters, squalene, and phospholipids; multiple detailed analyses of the polar components have been done. The protein composition is relatively understudied. Vernix of term infants has more squalene and a higher wax ester to sterol ester ratio than preterm infants.
What is the waxy white substance found coating the skin of newborn human babies?
Vernix caseosa. Vernix caseosa , also known as vernix or birthing custard, is the waxy white substance found coating the skin of newborn human babies. It is produced by dedicated cells and is thought to have some protective roles during fetal development and for a few hours after birth.
What is the morphology of Vernix?
Morphology. Vernix is composed of mobile corneocytes embedded in an amorphous lipid matrix. Precise biological mechanisms leading to its formation are hazily known. The cells are polygonal or ovoid in shape, malleable, and lack nuclei; typical thickness is 1-2 µm.
