Malatji Mokgadi Pulane, Tembe Danisile, Mukaratirwa Samson
School of Life Sciences, College of Agriculture, Engineering and Science, University of KwaZulu-Natal, Durban, South Africa.
Foundational Research & Services, South African National Biodiversity Institute, Pretoria 0001, South Africa.
Parasite Epidemiol Control. 2023 Jan 13;21:e00284. doi: 10.1016/j.parepi.2023.e00284. eCollection 2023 May.
Besnoitiosis is a parasitic disease of economic importance caused by cyst-forming protozoa from the genus . The disease affects the skin, subcutis, blood vessels, and mucous membranes of the animals. It is traditionally endemic in the tropical and sub-tropical regions of the world, and causes enormous economic loss associated with impaired productivity and reproduction, as well as skin lesions. Therefore, knowledge of the epidemiology of the disease, including the current species occurring in sub-Saharan Africa, the wide range of mammalian species hosts they use as intermediate hosts, and the clinical signs manifested by infected animals is crucial in developing effective prevention and control measures. This review collected information from peer-reviewed publications involving the epidemiology and clinical signs of besnoitiosis in sub-Saharan Africa using four electronic databases. Results showed that , and unidentified spp. were found naturally infecting livestock and wildlife across nine reviewed sub-Saharan African countries. was the most common species, occurring in all nine reviewed countries, and utilised a wide range of mammalian species as intermediate hosts. Prevalence of ranged from 2.0 to 80.3%, and 5.45-46.53%. Infection rate was high with serology compared to other techniques. Some of the typical signs of besnoitiosis included sand-like cysts on the sclera conjunctiva, nodules in the skin, thickening and wrinkling of the skin and alopecia. Inflammation, thickening and wrinkling of the scrotum were observed in bulls, and lesions on the scrotum deteriorated progressively and became generalized in some cases in spite of treatment. There is still a need for surveys focusing on detecting and identifying spp. using molecular techniques in combination with serological, histology and visual observation, and scoping their natural intermediate and definitive hosts, as well as assessing the burden of the disease animals reared on different husbandry systems in sub-Saharan Africa.
贝诺孢子虫病是一种由 属的形成包囊的原生动物引起的具有经济重要性的寄生虫病。该病影响动物的皮肤、皮下组织、血管和黏膜。传统上,该病在世界热带和亚热带地区呈地方性流行,会因生产力和繁殖能力受损以及皮肤病变而造成巨大经济损失。因此,了解该病的流行病学情况,包括撒哈拉以南非洲目前存在的 物种、它们用作中间宿主的广泛的哺乳动物物种以及受感染动物表现出的临床症状,对于制定有效的预防和控制措施至关重要。本综述使用四个电子数据库,从同行评审的出版物中收集了有关撒哈拉以南非洲贝诺孢子虫病流行病学和临床症状的信息。结果表明,在九个经审查的撒哈拉以南非洲国家中,发现 、 和未鉴定的 物种自然感染家畜和野生动物。 是最常见的物种,在所有九个经审查的国家中都有出现,并以广泛的哺乳动物物种作为中间宿主。 的流行率在2.0%至80.3%之间, 为5.45 - 46.53%。与其他技术相比,血清学检测的感染率较高。贝诺孢子虫病的一些典型症状包括巩膜结膜上的沙样囊肿、皮肤结节、皮肤增厚和起皱以及脱毛。公牛出现阴囊炎症、增厚和起皱,尽管进行了治疗,但在某些情况下,阴囊病变仍会逐渐恶化并扩散。仍需要开展调查,重点是使用分子技术结合血清学、组织学和视觉观察来检测和鉴定 物种,确定它们的自然中间宿主和终末宿主,以及评估撒哈拉以南非洲不同饲养系统中饲养的患病动物的疾病负担。