Author
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King, Daniel |
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Submitted to: American Association of Avian Pathologists
Publication Type: Abstract Only Publication Acceptance Date: 6/1/2006 Publication Date: 7/15/2006 Citation: King, D.J. 2006. Stability of selected Newcastle disease virus (NDV) strains at environmental temperatures that range from hot to cold [abstract]. American Association of Avian Pathologists. p. 157. Interpretive Summary: N/A. Technical Abstract: During the 2002-2003 Newcastle disease outbreak in the Southwestern U.S. there was concern about movement of manure from farms with infected flocks. Virus shed in the feces would be subjected to varying environmental temperatures during storage at different geographic locations. Treatment of that infective manure by composting or drying to inactivate any virus present would extend temperatures to those considerably above ambient temperature. Comparative thermostability profiles are being developed for low virulence and virulent NDV strains including LaSota, Ulster, and Chicken/California/212676/2002 as the basis for assessing risk of NDV persistence in manure held or treated at different temperatures. At a typical composting temperature of 55C (131 F) the treatment time to inactivate the test viruses varied from 20 minutes, the least thermostable, to 55 minutes, the most thermostable. Increasing the temperature reduced the difference among strains whereas decreasing the temperature expanded the difference. |
