What is a bacteriophage plaque?
What is a bacteriophage plaque?
A phage plaque is a clearing in a bacterial lawn. Plaques form via an outward diffusion of phage virions that is fed by bacterial infection. Anything that slows phage diffusion can impede plaque development and thereby plaque size.
What is a plaque in virology?
A viral plaque is a visible structure formed after introducing a viral sample to a cell culture grown on some nutrient medium. The virus will replicate and spread, generating regions of cell destruction known as plaques.
What is a plaque microbiology quizlet?
Plaque is the general term for the microbial community found on the tooth surface.
What is plaque in simple words?
1 : a flat thin piece (as of metal) with writing on it that serves as a memorial of something. 2 : a sticky usually colorless thin film on the teeth that is formed by and contains bacteria. plaque. noun. variants: also placque \ ˈplak \
Why do phages form plaques?
If a phage lysogenized a host cell immediately upon infection, it would never form a plaque. Instead, when temperate phage infects a population of exponentially growing cells, each phage produces a plaque with a “bulls-eye” plaque morphology, a turbid center surrounded by a ring of clearing.
What is a plaque in terms of in virus infected cells?
When the plates are incubated, the original infected cells release viral progeny. The spread of the new viruses is restricted to neighboring cells by the gel. Consequently, each infectious particle produces a circular zone of infected cells called a plaque.
What is the plaque method quizlet?
Plaque Method. method in which a sample of bacteriophage is mixed with host bacteria and melter agar, poured into a, petri dish, and following several viral multiplication cycles, all of the bacteria in the area surrounding the virus are destroyed. Plaques.
What is the purpose of plaque assay?
The plaque assay is a well established method for measuring virus concentration as it relates to infectious dose. The assay relies on determining the number of plaque forming units (pfu) created in a monolayer of virus-infected cells.
What are the two types of plaque?
Doctors have found that there are 2 kinds of plaque: hard and soft. If hard plaque builds up in the arteries that supply blood to your heart, the blood flow slows or stops, preventing enough oxygen from getting to the heart, leading to a heart attack.
What is the meaning of plaque?
plaque (plăk) n. 1. A flat plate, slab, or disk that is ornamented or engraved for mounting, as on a wall for decoration or on a monument for information. 2. A small pin or brooch worn as an ornament or a badge of membership. 3. A scaly patch on a body part, especially the skin. 4.
What does plaque mean in medical terms?
– Lifestyle changes, such as eating a healthier (lower sodium, lower fat) diet, increasing physical activity, reaching a healthy weight, and quitting smoking – Medicines to treat risk factors for CAD, such as high cholesterol, high blood pressure, or an irregular heartbeat – Surgical procedures to help restore blood flow to the heart
What is the definition of plaque?
plaque- (pathology) a small abnormal patch on or inside the body. maculation, patch, speckle, dapple, fleck, spot- a small contrasting part of something; “a bald spot”; “a leopard’s spots”; “a patch of clouds”; “patches of thin ice”; “a fleck of red”.
What are the causes of plaque?
Tooth location: Tooth decay most frequently occurs in the back teeth.