What is the basic structure of a bacteriophage?
Characteristics of bacteriophages The nucleic acid may be either DNA or RNA and may be double-stranded or single-stranded. There are three basic structural forms of phage: an icosahedral (20-sided) head with a tail, an icosahedral head without a tail, and a filamentous form.
What cycle is influenza in?
The influenza virus life cycle can be divided into the following stages: entry into the host cell; entry of vRNPs into the nucleus; transcription and replication of the viral genome; export of the vRNPs from the nucleus; and assembly and budding at the host cell plasma membrane.
Who named Ebola?
Ebola [ebʹo-lə] Johnson suggested naming the virus after a nearby river, and the rest of the commission agreed (Figure 1).. The Belgian name for the river, l’Ebola, is actually a corruption of the indigenous Ngbandi name Legbala, meaning “white water” or “pure water” (J.G. Breman, L.E.
Where did Ebola start in 1976?
In 1976, the first cases of Ebola virus disease in northern Democratic Republic of the Congo (then referred to as Zaire) were reported.
Is Ebola DNA or RNA?
The virion nucleic acid of Ebola virus consists of a single-stranded RNA with a molecular weight of approximately 4.0 x 10(6).
Is Ebola a ssRNA?
Ebolavirus (EBOV), a member of the Filoviridae family, is a negative-sense ssRNA virus that has a filamentous appearance (Fig. 9.1B).
Who was the first person in the world to get Ebola?
|Thomas Eric Duncan|
|Born||December 30, 1972 Monrovia, Liberia|
|Died||October 8, 2014 (aged 41) Dallas, Texas, United States|
|Cause of death||Ebola virus disease|
How many stages are there in Lysogenic cycle?
Does influenza go through Lysogenic cycle?
Like the lytic cycle, in the lysogenic cycle the virus attaches to the host cell and injects its DNA. For example, the flu is caused by the influenza virus. Typically, viruses cause an immune response in the host, and this kills the virus.
What is Lysogenic infection?
MOSTLY UNAMBIGUOUSLY USED TERM. A reductive infection that results in ongoing phage genome replication, as a prophage, and specifically does not involve virion production except following subsequent prophage induction.
What is the process of the lysogenic cycle?
The lysogenic cycle is a method by which a virus can replicate its DNA using a host cell. In the lysogenic cycle, the DNA is only replicated, not translated into proteins. In the lytic cycle, the DNA is multiplied many times and proteins are formed using processes stolen from the bacteria.
Who was the first Ebola victim?
On October 8, 2014, Thomas Eric Duncan, the first person diagnosed with a case of the Ebola Virus Disease in the U.S., dies at age 42 at Texas Health Presbyterian Hospital in Dallas.
What virus uses the lysogenic cycle?
As the lysogenic cycle allows the host cell to continue to survive and reproduce, the virus is reproduced in all of the cell’s offspring. An example of a bacteriophage known to follow the lysogenic cycle and the lytic cycle is the phage lambda of E. coli.
What triggers Lysogenic cycle?
In the lysogenic cycle, phage DNA is incorporated into the host genome, where it is passed on to subsequent generations. Environmental stressors such as starvation or exposure to toxic chemicals may cause the prophage to excise and enter the lytic cycle.
Is Ebola a worm?
This genus was introduced in 1998 as the “Ebola-like viruses”. In 2002, the name was changed to Ebolavirus and in 2010, the genus was emended. Ebolaviruses are closely related to marburgviruses….
What spreads Ebola?
Ebola is spread by direct contact with blood or other body fluids (such as: vomit, diarrhea, urine, breast milk, sweat, semen) of an infected person who has symptoms of Ebola or who has recently died from Ebola.
What is difference between lytic and lysogenic cycle?
The difference between lysogenic and lytic cycles is that, in lysogenic cycles, the spread of the viral DNA occurs through the usual prokaryotic reproduction, whereas a lytic cycle is more immediate in that it results in many copies of the virus being created very quickly and the cell is destroyed.
Is there a vaccine to prevent Ebola?
The U.S. Food and Drug Administration (FDA) approved the Ebola vaccine rVSV-ZEBOV (called Ervebo®) on December 19, 2019. This is the first FDA-approved vaccine for Ebola.
How can we prevent and control Ebola?
The best way to avoid Ebola is to stay away from areas where the virus is common. If you are in an outbreak area: Avoid infected people, their body fluids, and the bodies of anyone who has died from the disease. Avoid contact with wild animals, like bats and monkeys, and their meat.
What is Ebola’s life cycle?
The steps in the life cycle of the Ebola virus are: Extracellular virion, where the enveloped virus outside of a cell or host gains entry into a host cell. Recruitment of two host proteins Cathepsin B and L to process the glycoprotein needed for release from the vesicle.