| 41. | And tuberculosis, once battled with effective drugs, has developed a new virulent strain and is on the march.
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| 42. | Meningococcal disease, a virulent strain of meningitis, killed 25 people in outbreaks across the country of 19 million.
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| 43. | The BCG strain was isolated after subculturing 239 times during 13 years from virulent strain on glycerine potato medium.
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| 44. | A virulent strain of E . coli 0157 : H7 was first recognized as a human pathogen in 1982.
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| 45. | Miyazaki said epidemics often occur when viruses evolve into more virulent strains as they move from animals to people.
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| 46. | The mentally unstable Keeley is involved in bacteriological research designed to create a virulent strain of the bubonic plague.
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| 47. | Considering that the most virulent strains hit every 30 years on average, scientists are expecting another serious outbreak soon.
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| 48. | Scientists found that the virulent strain of E . coli shares about 3, 500 genes with its harmless cousin.
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| 49. | Considering the most virulent strains hit about every 30 years on average, scientists are expecting another serious outbreak soon.
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| 50. | He injected monkeys with high doses of the same virulent strain that Russian scientists once turned into a biological weapon.
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