Which of the bacteriophage is virulent?
T-4 bacteriophage is a virulent bacteriophage that infects E. coli bacteria; virulent bacteriophages have a lytic life cycle.
Why is lytic cycle virulent?
The lytic cycle results in the destruction of the infected cell and its membrane. Bacteriophages that only use the lytic cycle are called virulent phages (in contrast to temperate phages).
What is the difference between a temperate phage and a virulent phage?
The key difference between virulent and temperate phage is that virulent phages kill bacteria during every infection cycle since they replicate only via the lytic cycle while temperate phages do not kill bacteria immediately after the infection since they replicate using both lytic and lysogenic cycles.
How might bacteriophage affect the virulence of a bacterium?
Several bacteriophages have been reported to add virulence factors to their host and to increase bacterial virulence. However, lytic bacteriophages can also exert a selective pressure allowing the proliferation of strains with reduced virulence.
What does the term virulent mean?
Definition of virulent 1a : marked by a rapid, severe, and destructive course a virulent infection. b : able to overcome bodily defensive mechanisms : markedly pathogenic virulent bacteria. 2 : extremely poisonous or venomous. 3 : full of malice : malignant virulent racists.
Do virulent phages only have lytic cycles?
Virulent phage: Phage which displays only lytic cycles (no chronic or lysogenic cycles). Temperate phage: Phage which can undergo either virion-productive or lysogenic cycles. Prophage: Phage genome that replicates with its host cell while not generating virion progeny.
What’s the difference between lytic and lysogenic cycle?
The lytic cycle involves the reproduction of viruses using a host cell to manufacture more viruses; the viruses then burst out of the cell. The lysogenic cycle involves the incorporation of the viral genome into the host cell genome, infecting it from within.
What are the two types of viral replication?
There are two processes used by viruses to replicate: the lytic cycle and lysogenic cycle. Some viruses reproduce using both methods, while others only use the lytic cycle. In the lytic cycle, the virus attaches to the host cell and injects its DNA.
What is a virulent phage?
virulent phage A bacteriophage that causes the destruction of the host bacterium by lysis. Temperate phages, on the other hand, rarely cause lysis. A Dictionary of Plant Sciences. “virulent phage .”
How do temperate viruses differ from virulent viruses?
Virulent phages are restricted to lytic infections, where rapid viral replication ends in progeny release and bacterial death. Temperate phages can follow either a lytic or a lysogenic cycle. In the latter, viral DNA maintains itself in the host as a prophage.