Abrar Research and Training Centre, Abrar University, Mogadishu, Somalia.
Vector-Borne Diseases Laboratory, Department of Veterinary Medicine, Universidade Federal do Paraná, Curitiba, PR, Brazil.
Parasitology. 2020 Dec;147(14):1786-1791. doi: 10.1017/S003118202000178X. Epub 2020 Sep 21.
African animal trypanosomiasis (AAT) affects the livestock of 12.3 million Somalis and constrains their development and wellbeing. There is missing data on AAT in the country after the civil war of the 1990s. Therefore, this study has aimed to assess the prevalence of Trypanosoma spp. in 614 blood samples from cattle (n = 202), goats (n = 206) and sheep (n = 206) in Afgoye and Jowhar districts, Somalia using parasitological and molecular methods. Twenty-one out of 614 (3.4%; 95% CI: 2.1-5.2%) and 101/614 (16.4%; 95% CI: 13.6-19.6%) ruminants were positive for Trypanosoma spp. by buffy coat technique (BCT) and internal transcribed spacer 1 (ITS1)-polymerase chain reaction (PCR), respectively. Using ITS1-PCR, the highest prevalence was observed in cattle (23.8%; 95% CI: 18.4-30.1%) followed by goats (17.5%; 95% CI: 12.9-23.3%) and sheep (8.3%; 95% CI: 5.1-12.9%). A total of 74/101 (73.3%; 95% CI: 63.5-81.6%) ruminants were shown coinfection with at least two Trypanosome species. The four T. brucei-positive samples have tested negative for T. b. rhodesiense, by the human-serum-resistance-associated-PCR. Trypanosoma evansi, T. godfreyi, T. vivax, T. brucei, T. simiae and T. congolense were the Trypanosoma species found in this study. This is the first study on the molecular detection of Trypanosoma sp. in ruminants in Somalia. Further investigations and control measures are needed to manage Trypanosomiasis spreading in the country. Studies should also focus on the detection of T. b. rhodesiense in the country.
非洲动物锥虫病(AAT)影响着 1230 万索马里人的牲畜,限制了他们的发展和福祉。20 世纪 90 年代的内战之后,该国关于 AAT 的数据缺失。因此,本研究旨在使用寄生虫学和分子方法评估 614 份来自索马里阿夫戈耶(Afgoye)和乔哈尔(Jowhar)地区牛(n = 202)、山羊(n = 206)和绵羊(n = 206)血液样本中锥虫属(Trypanosoma spp.)的流行率。通过血涂片技术(BCT)和内部转录间隔区 1(ITS1)-聚合酶链反应(PCR),分别有 21/614(3.4%;95%置信区间:2.1-5.2%)和 101/614(16.4%;95%置信区间:13.6-19.6%)的反刍动物呈锥虫属阳性。使用 ITS1-PCR,牛的流行率最高(23.8%;95%置信区间:18.4-30.1%),其次是山羊(17.5%;95%置信区间:12.9-23.3%)和绵羊(8.3%;95%置信区间:5.1-12.9%)。101 份阳性样本中,有 74 份(73.3%;95%置信区间:63.5-81.6%)显示至少两种锥虫种混合感染。通过人血清抗性相关-PCR,对 4 份 T. brucei 阳性样本进行检测,结果均为 T. b. rhodesiense 阴性。本研究中发现的锥虫物种包括 T. evansi、T. godfreyi、T. vivax、T. brucei、T. simiae 和 T. congolense。这是索马里首次对反刍动物锥虫属进行分子检测。需要进一步调查和控制措施来管理该国锥虫病的传播。研究还应关注该国 T. b. rhodesiense 的检测。