Dynamic of "Eimeria" oocyst excretion during pregnancy and early lactation in native goats raised extensively in semiarid region

The study aimed to characterize the excretion dynamic of Eimeriaoocyst during pregnancy and early lactation in native goats raised extensively in semiarid region. Twenty pregnancy does were selected and monitored during eight months. The count of oocyst per gram of feces (Oopg) was determined fortnightly from first month of pregnancy until 90^o day postpartum. The Oopg varied during pregnancy and the high stand lowest values were 3,300±709 and 1,726±215 respectively. After rise in the first fortnight, the Oopg gradually decreased until the 105^th day and increased again until the end of pregnancy. In the post partum period, following the trend of late pregnancy, there was a progressive increase in oocysts excretion until 90^th day of lactation. The average number of oocysts excreted during early lactation was greater than during pregnancy, whose values were 3,006±102.3 vs 2,312±98.03 Oopg, respectively (P<0.05). The excretion dynamics of oocysts of Eimeriasp. during pregnancy and early lactation in native goats raised extensively in semiarid region is characterized as a sharp rise in the first fortnight, followed by gradual reduction until intermediate phase and a continuous rise in the last third of gestation and early lactation.

本研究旨在阐明半干旱地区粗放饲养的本地山羊妊娠及早期泌乳阶段的艾美耳球虫（Eimeria）卵囊排泄动态。本研究选取20头妊娠母山羊，开展为期8个月的跟踪监测。自妊娠首月至产后第90天，每两周检测一次每克粪便卵囊计数（Oopg）。妊娠期间Oopg数值存在波动，最高值与最低值分别为3300±709和1726±215。Oopg在首两周上升后，逐渐下降至第105天，随后再度升高直至妊娠末期。产后阶段，卵囊排泄量延续妊娠晚期的变化趋势，直至泌乳第90天持续逐步升高。早期泌乳阶段的平均卵囊排泄量高于妊娠阶段，分别为3006±102.3 Oopg与2312±98.03 Oopg，差异具有统计学意义（P<0.05）。半干旱地区粗放饲养的本地山羊妊娠及早期泌乳阶段的艾美耳球虫卵囊排泄动态特征为：首两周快速升高，随后逐步下降至妊娠中期，在妊娠最后三分之一阶段及早期泌乳阶段持续升高。