Molecular survey of bovine Babesia species in Bactrian camels (Camelus bactrianus) in Mongolia
Molecular survey of bovine Babesia species in Bactrian camels (Camelus bactrianus) in Mongolia
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DOI：
10.1016/j.ttbdis.2021.101871
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发表时间：
2022-01-01
影响因子：
3.2
通讯作者：
Yokoyama, Naoaki
中科院分区：
文献类型：
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作者：
Otgonsuren, Davaajav;Sivakumar, Thillaiampalam;Yokoyama, Naoaki
牛巴贝虫病是由巴贝虫属（Babesium）的物种引起的，是每年给养牛业造成相当大的经济损失的主要原因。在非牛宿主（如水牛布法罗（Bubalus bubalis））中经常检测到牛Babelus属，寄生虫可通过蜱传播给牛。因此，不仅在牛中，而且在非牛携带者中，都应尽量减少巴氏杆菌感染。在本研究中，我们调查了蒙古双峰驼（Camelus bactrianus）的三种临床上重要的牛巴贝虫物种，包括牛巴贝虫、B。bigemina和Babalypsp. Mymensingh，这两种病原菌以前曾在蒙古牛中发现过。我们筛选血液DNA样本305双峰驼在蒙古6个省，这些物种，寄生虫特异性PCR检测。我们的研究结果表明，蒙古的双峰驼感染了所有三种调查的巴贝虫。B. bovis，牛湾（B. bigemina和Babysp. Mymensingh的感染率分别为32.1%、21.6%和24.3%，而52.5%的被调查动物感染了至少一种寄生虫。我们还发现，雌性双峰驼和蒙古本地骆驼品种的巴氏杆菌阳性率显著高于雄性双峰驼和Hos Zogdort品种。在蒙古，牛和双峰驼通常共用牧场放牧;此外，感染牛的蜱虫也感染双峰驼。我们的研究结果，连同这些观察结果，表明牛Bababelus物种的蜱传播可能是牛和双峰驼之间。因此，蒙古控制牛巴贝斯虫病的策略应包括尽量减少双峰驼中牛巴贝斯虫感染的方法。
Bovine babesiosis, which is caused by species of genus Babesia, is a leading cause of considerable economic losses to the cattle industry each year. Bovine Babesia species have frequently been detected in non-cattle hosts, such as water buffalo (Bubalus bubalis), from which the parasites can be transmitted by ticks to cattle. Therefore, Babesia infections should be minimized not only in cattle but also in non-cattle carriers. In the present study, we surveyed the Bactrian camels (Camelus bactrianus) in Mongolia for three clinically significant bovine Babesia species, including Babesia bovis, B. bigemina, and Babesia sp. Mymensingh, which had been detected previously in Mongolian cattle. We screened blood DNA samples from 305 Bactrian camels in six Mongolian provinces for these species, using parasite-specific PCR assays. Our findings showed that the Bactrian camels in Mongolia were infected with all three Babesia species surveyed. The overall positive rates of B. bovis, B. bigemina, and Babesia sp. Mymensingh were 32.1%, 21.6%, and 24.3%, respectively, whereas 52.5% of the surveyed animals were infected with at least one parasite species. We also found that the female Bactrian camels and the Mongolian native camel breed had significantly higher Babesia positive rates than the male Bactrian camels and the Hos Zogdort breed. In Mongolia, cattle and Bactrian camels usually share common pasture lands for grazing; furthermore, tick species infesting cattle also infest Bactrian camels. Our findings, together with these observations, suggest that the tick transmission of bovine Babesia species might be possible between cattle and Bactrian camels. Therefore, strategies for the control of bovine babesiosis in Mongolia should include methods to minimize bovine Babesia species infections in Bactrian camels.