The subfamily Chordopoxvirinae encompasses viruses that infect vertebrate hosts and consists of eight genera, at least four of which cause human illness. (microbiologynote.com)
As the original cell dies from the cytolytic RNA virus , these thousands of viruses will infect nearby cells. (wikidoc.org)
Pocks2
The growth of viruses is indicated by death of embryo and/or formation of pocks. (biologyease.com)
Both vaccinia and variola viruses produce pocks in 48-72 hours on the CAM of 11- to 13-day-old chick embryos. (microbiologynote.com)
Viral3
Cell culture technique is used for isolation of viruses from the clinical specimens and for diagnosis of viral diseases. (biologyease.com)
Number of viruses are used for the production of Vaccines against different viral diseases. (biologyease.com)
This prevents viral replication and inhibits normal cell ribosome function, killing both the virus and the host cell if the response is active for a sufficient amount of time. (wikidoc.org)
Influenza2
May-October - American pathologists Ernest William Goodpasture and Alice Miles Woodruff publish their results on growing influenza and several other viruses in fertilised chicken eggs. (wikipedia.org)
Richard Shope publishes three papers identifying influenza A virus as the cause of swine influenza. (wikipedia.org)
Belong1
These viruses, which belong to the family Poxviridae, are a broad group of morphologically identical DNA viruses that share a nucleocapsid protein . (microbiologynote.com)
Eggs1
Certain viruses get fail to grow on primary inoculation into eggs. (biologyease.com)
Host3
Viruses are acellular pathogenic organisms that rely on the host cells for their multiplication and growth because of the lack of their own metabolic machinery. (biologyease.com)
Viruses are not able to grow on culture media as that of bacteria and they require healthy living cells called host cells. (biologyease.com)
The variola and vaccinia viruses can be differentiated by their growth characteristics and host range. (microbiologynote.com)
This technique is not an efficient method for the cultivation of viruses. (biologyease.com)
Cultivation of viruses by Embryonated egg method. (biologyease.com)
Cells9
Living cells support the replication of viruses from which viruses can be harvested for further tests. (biologyease.com)
The growth of the viruses in the cell line can be detected by changes in the morphology of infected cells. (biologyease.com)
Cells may get killed by the infection of viruses. (biologyease.com)
Select a layer of cells that are infected with viruses and which show morphological changes. (biologyease.com)
The morphological changes that occurred in cells are linked with the multiplication of viruses. (biologyease.com)
Cells showing any cytopathic changes is an indication of multiplication of viruses and vice-versa. (biologyease.com)
Susceptible cells should be selected for the cultivation of viruses. (biologyease.com)
Viruses such as variola and vaccinia can be cultivated in tissue cultures of monkey kidney, HeLa, and chicken embryo cells. (microbiologynote.com)
Interferons (IFNs) are natural proteins produced by the cells of the immune system of most vertebrates in response to challenges by foreign agents such as viruses , parasites and tumor cells. (wikidoc.org)
Growth1
Yolk sac is used for growth of viruses as well as parasite. (biologyease.com)
Living organisms2
It has been argued whether viruses are living organisms. (bionity.com)
Biologists debate whether or not viruses are living organisms. (wikidoc.org)
Cultures2
[3] Felix d'Herelle described viruses that caused areas of death on thin cell cultures on agar . (bionity.com)
The problem was solved in 1949 when John Franklin Enders , Thomas H. Weller and Frederick Chapman Robbins grew polio virus in cultures of living animal cells. (bionity.com)
Biological viruses2
This article relates to biological viruses. (bionity.com)
[3] Today, virus is used to describe the biological viruses discussed above and as a metaphor for other parasitically-reproducing things, such as memes or computer viruses (since 1972). (wikidoc.org)
[10] Dimitri Ivanovski used this filter to study an infection of tobacco plants, now known as tobacco mosaic virus . (wikidoc.org)
Electron microscopy1
With the invention of electron microscopy came the first images of viruses. (bionity.com)
Chicken1
[7] However, some viruses would not grow in chicken eggs. (bionity.com)
Discovery1
[2] A meaning of "agent that causes infectious disease" is first recorded in 1728, [1] before the discovery of viruses by the Russian-Ukrainian biologist Dmitry Ivanovsky in 1892. (wikidoc.org)
Similar1
[9] In the late 18th century, Edward Jenner observed and studied Miss Sarah Nelmes, a milkmaid who had previously caught cowpox and was found to be immune to smallpox , a similar, but devastating virus. (wikidoc.org)
Immune1
Often, a virus is completely eliminated by the immune system . (bionity.com)
Found1
Fertile eggs have been found to give much greater yields of some viruses than are obtainable otherwise, and they are thus a very good source of material for vaccines. (rockefeller.edu)
Animal1
Therefore viruses are either animal, plant or bacterial types. (bionity.com)