21. The experts in Barcelona also expressed concern about the emergence of resistant strains . 22. He conceded that health authorities were losing the battle to control drug-resistant strains . 23. This is seen in DMI-resistant strains of " Venturia inaequalis ". 24. Moreover, some are concerned that antibacterials might lead to development of bacteria-resistant strains . 25. Some jails are breeding grounds for drug-resistant strains of tuberculosis that defy traditional treatments. 26. Gonorrhea usually can be treated with antibiotics, although some drug-resistant strains have been developed. 27. Alternative drugs to treat resistant strains are rare and expensive. 28. Every disease, he points out, has susceptible and resistant strains . 29. In Dublin, they found 88 percent containing the azithromycin-resistant strain . 30. Interruption of the therapy can promote the emergence of a resistant strain of HIV.
