What is a non permissive cell?

A cell that does not allow the multiplication within it of a virus. (

What is one requirement for a cell to be permissive for infection by a specific virus?

Cells that a virus may use to replicate are called permissive. For most viruses, the molecular basis for this specificity is that a particular surface molecule known as the viral receptor must be found on the host cell surface for the virus to attach.

What is a susceptible cell?

• A susceptible cell has a functional receptor for. a given virus – the cell may or may not be able to. support viral replication. • A resistant cell has no receptor – it may or may. not be competent to support viral replication.

How can you identify that a cell may be infected with virus?

Often the first sign of viral infections is rounding of the cells. In some diseased tissues, intracellular structures called inclusion bodies appear in the nucleus and/or cytoplasm of infected cells. Inclusion bodies were first identified by light microscopy in smears and stained sections of infected tissues.

What is non permissive temperature?

The permissive temperature is the temperature at which a temperature-sensitive mutant gene product takes on a normal, functional phenotype. In contrast, the nonpermissive temperature or restrictive temperature is the temperature at which the mutant phenotype is observed.

What is a semi permissive environment?

The Semi-permissive Environment: Tactical Field Care. This environment is not safe, but the direct threat is removed (albeit prob- ably temporarily). Casualty and rescuer might be behind cover, but there is no guarantee the potential assailant or threat will not move and threaten them again.

Which kind of virus begins multiplying first?

To multiply, a virus must first infect a cell. Susceptibility defines the capacity of a cell or animal to become infected. The host range of a virus defines both the kinds of tissue cells and the animal species which it can infect and in which it can multiply.

How can viruses be detected?

Viral DNA or RNA detection test. Using a sample of tissue or blood or other fluid (such as spinal fluid), this type of test looks for the genetic material (DNA or RNA) of a specific virus. This test can show the exact virus causing an infection.

What is the most common method used to identify viruses?

The most widely employed methods are viral culture and antigen detection by FA staining or EIA. Suitable specimens include nasopharyngeal aspirates, washings, or swabs; bronchial washings; and bronchoalveolar lavage fluid.

What are conditional mutations?

In the class of conditional mutations, a mutant allele causes a mutant phenotype in only a certain environment, called the restrictive condition, but causes a wild-type phenotype in some different environment, called the permissive condition. Geneticists have studied many temperature-conditional mutations.

What does temperature sensitivity mean?

Temperature sensitivity is defined as the physiological or behavioral response of an organism to changing temperature conditions.

What’s the medical definition of the word permissive?

Medical Definition of permissive. : supporting growth or genetic replication (as of a virus) permissive temperatures permissive monkey cells.

Which is an example of a permissive cell?

per·mis·sive cell. a cell in which the late phase of viral infection follows the early phase and cell death is coupled with massive synthesis of virus; for example, monkey cells are permissive for SV40.

What makes a virus a permissive cell or host?

A permissive cell or host is one that allows a virus to circumvent its defenses and replicate.

What does it mean to be a permissive host?

For the flavor of software license, see permissive free software licence. A permissive cell or host is one that allows a virus to circumvent its defenses and replicate. Usually this occurs when the virus has modulated one or several of the host cellular intrinsic defenses and the host immune system.