pseudomembrane (redirected from Pseudomembranes)

pseudomembrane /pseu·do·mem·brane/ (-mem´brān) false membrane.pseudomem´branous

---

pseu·do·mem·brane (sd-mmbrn)

n.

See false membrane.

---

pseudomembrane

[-mem′brān]

Etymology: Gk, pseudes, false; L, membrana

a membrane consisting of coagulated fibrin, bacteria, and leukocytes that forms in the throats of diphtheria patients.

---

pseudomembrane,

n a loosely adherent, grayish false membrane typical of intracellular coagulation necrosis. It is formed by necrotic epithelium embedded in fibrin, leukocytes, and erythrocytes. It is seen in necrotizing ulcerative periodontal disease, apthous ulcers, and diphtheria. Removal leaves a raw, bleeding surface.

Pseudomonas

n a genus of gram-negative bacteria that includes several free-living species of soil and water and some opportunistic pathogens isolated from wounds, burns, and infections of the urinary tract.

---

pseudomembrane

a layer of coagulated fibrin, leukocytes and bacteria overlying a badly damaged mucous membrane and giving the appearance of being a viable tissue. Called also false membrane.

---

pseudomembrane 

A type of inflammatory response characterized by the production of mucus, which adheres to the adjacent conjunctiva. This differs from a true membrane in that the latter is firmly attached to the conjunctival surface and is composed of dead cells and debris.

---

pseudomembrane

A thin, adherent, gray-white exudative layer composed of necrotic epithelium and debris, fibrin, bacteria, PMNs, which overlies the mucosa of the–1 Colon, see Pseudomembranous colitis, and–2 Oropharynx, which extends from the tonsils to the contiguous soft and hard palates, and pharynx, the removal of which causes hemorrhage; pseudomembranes are classically seen in diphtheria–due to Corynebacterium diphtheriae, causing a bull-like neck; pseudomembranes of the oropharynx may also occur in shigellosis, staphylococcal infections, Clostridium perfringens, C difficile, less commonly in viral infections