Seroprevalence and associated risk factors of bovine neosporosis in the Khomas region of Namibia.

IF 1.5 3区 农林科学 Q2 VETERINARY SCIENCES Onderstepoort Journal of Veterinary Research Pub Date : 2023-04-05 DOI:10.4102/ojvr.v90i1.2077
Alaster Samkange, Simbarashe Chitanga, Georgina N Tjipura-Zaire, Vimanuka G Mutjavikua, Jan W Smith, Luis Neves, Tshepo Matjila
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Abstract

Neospora caninum is a coccidian parasite that occurs worldwide and is one of the most important causes of abortion, especially in cattle. However, no studies have been performed in Namibia to determine the N. caninum status in livestock. Therefore, this study aimed to determine the seroprevalence of N. caninum in cattle and the associated risk factors in the Khomas region of Namibia. A total of 736 sera were collected from cows in 32 farming establishments. These comprised 698 beef and 38 dairy cattle sera and were tested using a commercial enzyme-linked immunosorbent assay (ELISA) kit. Questionnaires were concurrently administered to determine possible risk factors associated with N. caninum seropositivity. A total of 42 sera were positive (all beef), giving an animal-level seroprevalence rate of 5.7%. Eight of the 32 establishments had at least one positive animal, giving a herd-level seroprevalence of 25%. There was no significant association between seropositivity and the presence of dogs, jackals, history of abortions, farm size, number of cattle or average annual rainfall. The establishments with moderate to high numbers of Feliformia were 9.8 times more likely to be seropositive to N. caninum than those with none to low levels of the former (p = 0.0245). The authors concluded that the seroprevalence level of N. caninum in the Khomas region was relatively low compared with other parts of the world and that the role of Feliformia in the epidemiology of bovine neosporosis needed to be further investigated.Contribution: Serological evidence of bovine neosporosis and the associated risk factors are reported in Namibia for the first time. This study contributes to the scientific body of knowledge on N. caninum in Africa, which is currently limited.

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纳米比亚Khomas地区牛新孢子病的血清患病率和相关危险因素。
犬新孢子虫是一种球虫寄生虫,发生在世界各地,是流产的最重要原因之一,特别是在牛。然而,在纳米比亚没有进行研究以确定犬奈瑟菌在牲畜中的状况。因此,本研究旨在确定纳米比亚Khomas地区牛中犬奈瑟菌的血清流行率及其相关危险因素。从32个养殖场所的奶牛中共收集了736份血清。其中包括698份牛肉血清和38份奶牛血清,并使用商用酶联免疫吸附测定(ELISA)试剂盒进行检测。同时进行问卷调查,以确定与犬奈瑟菌血清阳性相关的可能危险因素。共有42份血清呈阳性(均为牛肉),动物水平的血清阳性率为5.7%。32个场所中有8个至少有一只动物呈阳性,群体水平血清阳性率为25%。血清阳性与狗、豺的存在、流产史、农场规模、牛的数量或年平均降雨量之间没有显著关联。中高蚤孳生场所对犬北丝虫的血清阳性检出率是低蚤孳生场所的9.8倍(p = 0.0245)。作者得出结论,与世界其他地区相比,Khomas地区的N. caninum血清流行率相对较低,Feliformia在牛新孢子病流行病学中的作用有待进一步调查。贡献:首次在纳米比亚报告了牛新孢子病和相关危险因素的血清学证据。本研究为目前有限的非洲犬乳杆菌的科学知识体系做出了贡献。
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来源期刊
CiteScore
4.30
自引率
0.00%
发文量
13
审稿时长
16 weeks
期刊介绍: The Onderstepoort Journal of Veterinary Research, is the official publication of the Onderstepoort Veterinary Institute. While it considers submissions from any geographic region, its focus is on Africa and the infectious and parasitic diseases and disease vectors that affect livestock and wildlife on the continent.
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