"strain" nach Englisch mit Beispielen - Kollokationen-Wörterbuch Englisch
- The current epidemic strain evolved at the beginning of the 20th century - probably between 1908 and 1943.
- More than 100 types of cold viruses are known, and new strains of flu evolve every few years.
- Nevertheless, new strains may evolve that escape immunity induced by vaccines; for example an updated influenza vaccine is needed each year.
- If the virus is not reproducing, he explained, it cannot mutate, and drug resistant strains cannot evolve.
- The effectiveness of chloroquine against P. falciparum has declined as resistant strains of the parasite evolved.
- As climate, diseases, and pests change, the strain evolves and selects new defenses, programmed into the ge- netic orders contained in each generation of seeds.
- Just as bacterial evolution had allowed microbes to develop resistance to penicillin, strains of S. aureus evolved to become resistant to methicillin.
- Extremely virulent strains can eventually evolve by mutation and natural selection within the virus population inside a host.
- The anthropotropic strains (genotype 1 and 2) have evolved more recently than the others suggesting that this virus was originally a zooenosis.
- Two monkeys died six days after becoming infected, in contrast to the usual eight months or more of survival with the virus from which the fast-acting strain evolved.
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