Pus

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Overview

Pus is a whitish-yellow or yellow substance produced during inflammatory responses of the body that can be found in regions of pyogenic bacterial infections. An accumulation of pus in an enclosed tissue space is known as an abscess. A visible collection of pus within or beneath the epidermis, on the other hand, is known as a pustule or pimple. Pus is produced from the dead and living white blood cells which travel into the intercellular spaces around the affected cells.

Something that creates pus is called suppurative, pyogenic, or purulent. If it creates mucus as well as pus, it is called mucopurulent.

Pus consists of a thin, protein-rich fluid, known as liquor puris, and dead neutrophils (white blood cells), which are part of the body's innate immune response. Neutrophils are produced in the bone marrow and released into the blood. When the need to fight infection arises, they move to the site of infection by a process known as chemotaxis, usually triggered by cytokine release from macrophages that sense invading organisms. At the site of infection they engulf and kill bacteria. Eventually, the neutrophils die, and these dead cells are then phagocytosed by macrophages, which break them down further. Pus, therefore, is the viscous material composed of these dead neutrophils.

Neutrophils are the most abundant type of leukocyte in human blood, composing anywhere between 40% to 75% of leukocytes.

When seen in a wound or dry skin, pus indicates the area is infected and should be cleaned with antiseptic.

Despite normally being of a whitish-yellow hue, changes in the color of pus can be observed under certain circumstances. Blue pus is found in certain infections of Pseudomonas aeruginosa as a result of the pyocyanin bacterial pigment it produces; amoebic abscesses of the liver, meanwhile, produce brownish pus. Pus might have a reddish tint to it after mixing with blood. Pus also can have an odour.

See also

Cost Effectiveness of Pus

| group5 = Clinical Trials Involving Pus | list5 = Ongoing Trials on Pus at Clinical Trials.govTrial results on PusClinical Trials on Pus at Google


| group6 = Guidelines / Policies / Government Resources (FDA/CDC) Regarding Pus | list6 = US National Guidelines Clearinghouse on PusNICE Guidance on PusNHS PRODIGY GuidanceFDA on PusCDC on Pus


| group7 = Textbook Information on Pus | list7 = Books and Textbook Information on Pus


| group8 = Pharmacology Resources on Pus | list8 = AND (Dose)}} Dosing of PusAND (drug interactions)}} Drug interactions with PusAND (side effects)}} Side effects of PusAND (Allergy)}} Allergic reactions to PusAND (overdose)}} Overdose information on PusAND (carcinogenicity)}} Carcinogenicity information on PusAND (pregnancy)}} Pus in pregnancyAND (pharmacokinetics)}} Pharmacokinetics of Pus


| group9 = Genetics, Pharmacogenomics, and Proteinomics of Pus | list9 = AND (pharmacogenomics)}} Genetics of PusAND (pharmacogenomics)}} Pharmacogenomics of PusAND (proteomics)}} Proteomics of Pus


| group10 = Newstories on Pus | list10 = Pus in the newsBe alerted to news on PusNews trends on Pus


| group11 = Commentary on Pus | list11 = Blogs on Pus

| group12 = Patient Resources on Pus | list12 = Patient resources on PusDiscussion groups on PusPatient Handouts on PusDirections to Hospitals Treating PusRisk calculators and risk factors for Pus


| group13 = Healthcare Provider Resources on Pus | list13 = Symptoms of PusCauses & Risk Factors for PusDiagnostic studies for PusTreatment of Pus

| group14 = Continuing Medical Education (CME) Programs on Pus | list14 = CME Programs on Pus

| group15 = International Resources on Pus | list15 = Pus en EspanolPus en Francais

| group16 = Business Resources on Pus | list16 = Pus in the MarketplacePatents on Pus

| group17 = Informatics Resources on Pus | list17 = List of terms related to Pus


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