| the availability of state-level data on interstate cattle movements in the united states. | knowledge about the patterns of animal movement--particularly feeder-cattle movement--within the usa is necessary in order to anticipate how diseases might be spread geographically. this study was conducted to explore the availability of interstate-level movement data which might be used to develop a more coherent national picture of interstate feeder-cattle movement. state statistical offices of the national agricultural statistics service, 1996 (nass) and departments of agriculture in all 50 s ... | 1998 | 9879593 |
| rapid diagnosis of avian influenza virus in wild birds: use of a portable rrt-pcr and freeze-dried reagents in the field. | wild birds have been implicated in the spread of highly pathogenic avian influenza (hpai) of the h5n1 subtype, prompting surveillance along migratory flyways. sampling of wild birds for avian influenza virus (aiv) is often conducted in remote regions, but results are often delayed because of the need to transport samples to a laboratory equipped for molecular testing. real-time reverse transcriptase polymerase chain reaction (rrt-pcr) is a molecular technique that offers one of the most accurate ... | 2011 | 21847073 |
| potential oversummering and overwintering regions for the wheat stripe rust pathogen in the contiguous united states. | epidemics of wheat stripe rust, caused by puccinia striiformis f. sp. tritici (pst), are more frequent in the regions where pst can oversummer and overwinter. regions for potential oversummering and overwintering of pst were determined in the contiguous united states using a survival index (si) ranging from 0 (most unfavorable) to 10 (most favorable) developed based on long-term weather data. the pathogen can survive in cool summer in the most regions north of latitude 40°n, particularly washing ... | 2014 | 23722926 |