1.   But they began to develop resistance to the insecticide.

2.   Most patients gradually develop a resistance to the drug.

3.   Over time the patient could develop a resistance to the drug.

4.   Although wider use of antibiotics could increase the risk of antibiotic resistance, the officials said group B streptococci had not yet developed resistance to penicillin.

5.   Although the body produces enough insulin, tissues develop a resistance to its actions, and sugar levels rise above normal.

6.   And as Folkman and colleagues reported last month, the vessel-making cells on which endostatin acts do not develop resistance.

7.   And normal cells, he said, do not reshuffle their genes and so do not develop drug resistance.

8.   And the real problem is they can lose their effectiveness easily because the virus readily develops resistance, Hayden said.

9.   And though farmers used stronger and stronger chemicals, the fungi just developed stronger resistance.

10.   And will patients respond to a second protease inhibitor if they develop resistance to the first?