A survey of abortifacient infectious agents in livestock in Luzon, the Philippines, with emphasis on the situation in a cattle herd with abortion problems
A survey of abortifacient infectious agents in livestock in Luzon, the Philippines, with emphasis on the situation in a cattle herd with abortion problems
复制标题
DOI：
10.1016/j.actatropica.2007.12.004
复制
发表时间：
2008-03-01
期刊：
影响因子：
2.7
通讯作者：
Ohashi, Kazuhiko
中科院分区：
文献类型：
--
作者：
Konnai, Satoru;Mingala, Claro N.;Ohashi, Kazuhiko
在菲律宾，没有充分考虑对牲畜中的主要堕胎传染物采取系统的控制措施。为了阐明家畜流产感染因子的流行病学，对四种流产因子的流行率进行了评估。最初，应农场主的要求，在吕宋岛的牛群中共检查了96头牛，包括17头有流产史的牛。17头流产母牛中有6头（35.3%）血清学检查为犬新孢子虫阳性。未流产母牛血清阳性率为15.9%（10/63）。6头血清学阳性流产母牛中有4头也为牛病毒性腹泻病毒（BVDV）RT-PCR阳性。检查的16头公牛中有2头（12.5%）也发现感染BVDV，表明通过精液传播的假定风险因素。基于序列分析，检测到的分离株属于BVDV 1b型组。此外，还对吕宋岛牲畜群中的各种牲畜进行了流产传染性病原体的流行病学调查。在105份布法罗样品中，有4份（3.8%）为阳性。弓形虫2例（1.9%），伊氏锥虫2例（1.9%）。N.山羊和绵羊中犬感染率分别为23.6%（21/89）和26.3%（10/38）。在这些牛群中未检出BVDV。这项探索性研究的结果表明，感染和牛流产之间的关系，需要一个更大的研究，以统计学证实这种关系。(C)2007 Elsevier B. V.保留所有权利。
In the Philippines, insufficient consideration has been given to the implementation of systematic control measures against major abortifacient infectious agents in livestock. To elucidate the epidemiology of abortifacient infectious agents in livestock, the prevalence of four abortifacient agents was assessed. Initially, a total of 96 cattle including 17 cows with history of abortion were examined in a herd in Luzon at the request of the farm owner. Six (35.3%) of the 17 aborting cows were found to be serologically positive for Neospora caninum (N. caninum), whereas the seroprevalence in non-aborting cows was 15.9% (10/63). Four of the 6 serologically positive aborting cows were also RT-PCR-positive for bovine viral diarrhea virus (BVDV). Two (12.5%) of the 16 bulls examined were also found to be infected with BVDV, suggesting a putative risk factor of transmission via semen. Based on sequence analysis, the isolates detected belong to BVDV type 1b group. Furthermore, an epidemiological survey of abortifacient infectious agents was conducted with various species of livestock from herds located in Luzon. Out of the 105 water buffalo samples collected, 4 (3.8%) were indicated positive to N. caninum, 2 (1.9%) to Toxoplasma gondii (T gondii) and 2 (1.9%) to Trypanosoma evansi (T evansi). The overall seroprevalence of N. caninum in goat and sheep were 23.6% (21/89) and 26.3% (10/38), respectively. BVDV was not detected in these herds. The findings of this exploratory study indicate a relationship between infection and bovine abortion and that a lager study is required to statistically confirm this relationship. (C) 2007 Elsevier B.V. All rights reserved.