| 41. | This single amino acid change in the NS1 gene greatly increased the pathogenicity of the H5N1 influenza virus.
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| 42. | It was first isolated around breeding galleries of vascular wilt pathogenicity on " Ulmus procera ".
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| 43. | The pathogenicity of the EGFR mutation was supported by in vitro experiments and functional analysis of a skin biopsy.
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| 44. | One of the special things about this particular model is that it has two strains with vastly different pathogenicity.
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| 45. | When ( p ) ppGpp is absent, pathogenicity is compromised for reasons that vary with the organism studied.
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| 46. | It is not currently known if the strain in the British Columbia outbreak is a low or high pathogenicity form.
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| 47. | This mouse model of human poliovirus infection has proven to be an invaluable tool in understanding poliovirus biology and pathogenicity.
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| 48. | It has low pathogenicity in humans, and where infections have been found they are closely associated with immunocompromised individuals.
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| 49. | Results reported by Webster in July 2005 reveal further progression toward pathogenicity in mice and longer virus shedding by ducks.
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| 50. | However, the pathogenicity of " M . perstans " infection has been recently reconsidered in various studies.
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