Julius R S, Schwan E V, Chimimba C T
DST-NRF Centre of Excellence for Invasion Biology (CIB), Department Zoology and Entomology, University of Pretoria, Private Bag X20, Hatfield, 0028, South Africa.
Department of Veterinary Tropical Diseases, University of Pretoria, Private Bag X04, Onderstepoort, 0110, South Africa.
Parasitol Res. 2018 Jun;117(6):1729-1736. doi: 10.1007/s00436-018-5852-4. Epub 2018 Apr 6.
Concurrent studies of helminth parasites of introduced and native rodent species are few and miss the opportunity to identify potential co-invasive parasite species. This study employed molecular tools to infer the phylogeny and elucidate the origin of potentially co-invasive parasites of commensal, murid rodents by assessing introduced Rattus norvegicus, Rattus rattus, Rattus tanezumi, and native Mastomys coucha in Gauteng Province, South Africa. Genotypes of Nippostrongylus brasiliensis recovered from R. norvegicus are nearly identical to those recovered from elsewhere in the world. The pinworms, Aspiculurus tetraptera, recovered from introduced R. tanezumi and R. rattus, Syphacia muris recovered from R. tanezumi, and Syphacia obvelata recovered from indigenous M. coucha have affiliations to those recovered of laboratory rodents from the USA and China. Syphacia obvelata was previously only known as a commensal endoparasite of laboratory rodents, and the S. muris genotype recovered from R. tanezumi in this study shows an affiliation to a genotype recovered from the same host species in Indonesia which is part of the native range. The study emphasizes the need for surveillance of potential co-invasive species and contributes in documenting genetic diversity of endoparasites of well-known hosts.
对引入的啮齿动物物种和本地啮齿动物物种的蠕虫寄生虫进行的同步研究很少，因而错失了识别潜在共入侵寄生虫物种的机会。本研究运用分子工具，通过评估南非豪登省引入的褐家鼠、黑家鼠、黄毛鼠以及本地的库氏乳鼠，推断共生鼠科啮齿动物潜在共入侵寄生虫的系统发育并阐明其起源。从褐家鼠体内分离出的巴西日圆线虫基因型与世界其他地方分离出的基因型几乎相同。从引入的黄毛鼠和黑家鼠体内分离出的四翼无刺线虫、从黄毛鼠体内分离出的鼠管状线虫以及从本地库氏乳鼠体内分离出的奥氏管状线虫，与从美国和中国的实验啮齿动物体内分离出的同类寄生虫具有亲缘关系。奥氏管状线虫以前仅被认为是实验啮齿动物的共生体内寄生虫，而本研究中从黄毛鼠体内分离出的鼠管状线虫基因型与在印度尼西亚（该物种原生范围的一部分）同一宿主物种中分离出的一种基因型具有亲缘关系。该研究强调了对潜在共入侵物种进行监测的必要性，并有助于记录知名宿主体内寄生虫的遗传多样性。
