Zeller H G, Akakpo A J, Ba M M
Institut Pasteur, Antananarivo, Madagascar.
Ann Soc Belg Med Trop. 1995 Jun;75(2):135-40.
Following the 1987 Rift Valley fever (RVF) epizootic/epidemic in southern Mauritania, RVF antibody prevalence in small ruminants decreased significantly from 1988 to 1992. In October 1993, at the end of the rainy season, an active RVF virus transmission was detected in several locations of southern Mauritania in small ruminants, in association with an increase of abortions. RVF IgM and IgG antibodies were recorded respectively in 65/390 (16.67%) and 73/390 (18.72%) animals. RVF IgM antibody prevalence was significantly higher in the > or = 2 years old group (26.02%) than in the 0.5- < 2 year old group (7.20%) (p = 0.01). The enzootic maintenance of RVF virus is discussed, as well as the risks of extension by traditional nomadic movements of herds.
1987年毛里塔尼亚南部发生裂谷热（RVF）动物流行病/流行病之后，1988年至1992年期间，小型反刍动物的RVF抗体流行率显著下降。1993年10月，在雨季结束时，在毛里塔尼亚南部的几个地区，在小型反刍动物中检测到活跃的RVF病毒传播，同时流产数量增加。在390只动物中，分别有65只（16.67%）和73只（18.72%）检测到RVF IgM和IgG抗体。≥2岁组的RVF IgM抗体流行率（26.02%）显著高于0.5-<2岁组（7.20%）（p=0.01）。本文讨论了RVF病毒的地方病维持情况，以及畜群传统游牧迁移导致疫情蔓延的风险。
