phage
n . 抗菌素
抗菌素
phage n 1 :
a virus that is parasitic (
reproduces itself )
in bacteria ;
"
phage uses the bacterium '
s machinery and energy to produce more phage until the bacterium is destroyed and phage is released to invade surrounding bacteria " [
synonym :
{
bacteriophage }, {
phage }]
bacteriophage \
bacteriophage \
n .
sing . &
pl .
a virus which infects bacteria ; --
also colloquially called {
phage }
in laboratory jargon .
Note :
Bacteriophages are of many varieties ,
generally specific for one or a narrow range of bacterial species ,
and almost every bacterium is susceptible to at least one bacteriophage .
They may have DNA or RNA as their genetic component .
Certain types of bacteriophage ,
called {
temperate bacteriophage },
may infect but not kill their host bacteria ,
residing in and replicating either as a plasmid or integrated into the host genome .
Under certain conditions ,
a resident temperate phage may become induced to multiply rapidly and vegetatively ,
killing and lysing its host bacterium ,
and producing multiple progeny .
The {
lambda phage }
of {
Eschericia coli },
much studied in biochemical and genetic research ,
is of the temperate type .
[
PJC ]
bacteriophagic
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