11.   Apiculturists also are breeding bee strains resistant to mites.

12.   As the infected fail to recover after treatment, the World Health Organization can track the spread of resistant strains.

13.   Because of the heavy use of antibiotics in those settings, they are breeders of the most dangerously resistant strains.

14.   Bell notes that if the pollution disappears, the sensitive strains might re-emerge to outcompete the resistant strains, which may have to waste energy to defeat the pollution.

15.   --- People on anti-HIV treatments must take their drugs religiously to suppress the emergence of resistant strains, and also practice safe sex to avoiding infecting others.

16.   Albert Einstein College of Medicine has used luciferase to test antibiotics on new resistant strains of tuberculosis.

17.   But ear infections often linger now, because widespread use of antibiotics to fight the infections has bred resistant strains of bacteria, physicians said.

18.   Computer models developed by Smith show that heavy farm use of antibiotics dramatically increases the rate at which new resistant strains of bacteria move into human populations.

19.   Continual use of antibiotics is not advisable because of side effects and the risk of promoting resistant strains of bacteria.