Stayer P A, Pote L M, Keirs R W
College of Veterinary Medicine, Mississippi State University, Mississippi State 39762.
Poult Sci. 1995 Jan;74(1):26-32. doi: 10.3382/ps.0740026.
Eimeria oocyst populations were monitored in broiler houses on two farms during a growout and prior to the placement of new chicks on the same litter. Numbers of oocysts in litter were enumerated at Weeks 0, 5, 6, 7, and 9 and in feces at Weeks 5,6, and 7 in broiler houses with different management practices (both farms had identical coccidiostat programs but Farm A had a history of poor performance whereas Farm B had excellent performance records). On Farm A the number of oocysts in litter increased (P < .05) at the time of slaughter (Week 7) and placement of a subsequent flock (Week 9) when compared with Day 0. The number of oocysts in feces on Farm A also increased (P < .05) from Week 5 to 7. On Farm B there were no differences in numbers of oocysts in litter or feces over time. Farm B had (P < .05) lower numbers of oocysts in litter than Farm A at Week 7. The number of oocysts in feces from Farm B were consistently lower (P < .05) than Farm A at Weeks 5, 6, and 7. There were no differences in the species of Eimeria in litter between farms; however, there were differences in the species composition over time. Small (Eimeria mitis) and medium (primarily Eimeria acervulina) oocysts increased significantly over time, whereas the large oocysts (Eimeria tenella and Eimeria brunetti) and Eimeria maxima did not change over time. An increase (P < .05) in large oocysts was observed in fecal samples from Farm A over time.
在两个农场的肉鸡舍中，于一批肉鸡的整个饲养期内以及在同一垫料上饲养新一批雏鸡之前，对艾美耳球虫卵囊数量进行了监测。在采用不同管理方式的肉鸡舍中，分别于第0、5、6、7和9周对垫料中的卵囊数量进行计数，并于第5、6和7周对粪便中的卵囊数量进行计数（两个农场的抗球虫药使用方案相同，但农场A过去的生产成绩较差，而农场B有着优异的生产记录）。与第0天相比，农场A在屠宰时（第7周）和后续一批鸡入舍时（第9周），垫料中的卵囊数量增加（P < 0.05）。农场A粪便中的卵囊数量从第5周至第7周也有所增加（P < 0.05）。农场B垫料和粪便中的卵囊数量随时间没有差异。在第7周时，农场B垫料中的卵囊数量低于农场A（P < 0.05）。在第5、6和7周时，农场B粪便中的卵囊数量始终低于农场A（P < 0.05）。两个农场垫料中艾美耳球虫的种类没有差异；然而，种类组成随时间存在差异。小型（微小艾美耳球虫）和中型（主要是堆型艾美耳球虫）卵囊数量随时间显著增加，而大型卵囊（柔嫩艾美耳球虫和布氏艾美耳球虫）以及巨型艾美耳球虫数量随时间没有变化。随着时间推移，在农场A的粪便样本中观察到大型卵囊数量增加（P < 0.05）。
