粗甘油对生长猪生长性能、胴体性状及肉品的影响

通过一个为期138d的饲养试验来测定日粮中粗甘油对生长猪的生长性能,胴体性状,肉质指标和组织结构的影响。本试验使用的粗甘油包含84．51％甘油、11．95％水、2．91％氯化钠和0．32％甲醇。试验选用断奶8天后的仔猪共96头（48头公猪和48头母猪,平均体重为7．9±0．4kg）,按试验开始时的性别和体重分配到24个栏中（4头／栏）。日粮处理为玉米-豆粕型,     

A comparison of three rapid diagnostic methods for the detection of rotavirus infection in calves

Three techniques for the detection of rotavirus in faecal samples from calves with neonatal gastroenteritis were compared. A preliminary study indicated that reverse passive haemagglutination (RPHA) was at least as sensitive as the enzyme-linked immunosorbent assay (ELISA). These two immunoassays were compared with the detection of viral RNA by polyacrylamide gel electrophoresis (PAGE) on 209 field samples. Of the 77 samples in which at least one test gave a positive result, 69 were positive by both RPHA and PAGE, but only 49 were also positive by ELISA, indicating a lower sensitivity for the latter test. The overall agreement between RPHA and PAGE was 96%. The reasons for the discrepancies between the tests are discussed.