Oh Sang-Ik, Jung Suk-Han, Lee Han-Kyoung, Choe Changyong, Hur Tai-Young, So Kyoung-Min
Division of Animal Diseases & Health, National Institute of Animal Science, Rural Development Administration, Wanju 55365, Korea.
Happy Veterinary Clinic, 289 Nambuk-ro, Gimje 54373, Korea.
Vet Sci. 2021 Jun 23;8(7):118. doi: 10.3390/vetsci8070118.
is one of the most widely occurring zoonotic protozoan parasites causing diarrheal disease in calves. This study aimed to investigate the prevalence of in Korean native calves and elucidate the causal factors associated with giardiasis in these animals. We investigated the sequences of three genes (, , and ) of in fecal samples collected from 792 Korean native calves during 2019-2020. Data were analyzed with regard to age, sex, sampling season, and the fecal sample type (based on its physical characteristics). The samples were screened for the three genes mentioned above, and 44 samples (5.6%) were -positive. Polymerase chain reaction results showed a significantly higher prevalence of the infection in calves aged ≥1 month and in those with watery diarrhea in spring season. Screening for the gene sequences (87.5%), (96.2%), and (96.7%) revealed that most of the -positive samples belonged to assemblage E. Four of the -positive samples belonged to the zoonotic assemblage A. This study highlights the importance of continuous surveillance of genetic mutations in for the detection of emerging variants of zoonotic in calves.
是引起犊牛腹泻疾病的最广泛传播的人畜共患原生动物寄生虫之一。本研究旨在调查韩国本土犊牛中该寄生虫的流行情况，并阐明这些动物中贾第虫病的相关致病因素。我们对2019 - 2020年期间从792头韩国本土犊牛采集的粪便样本中的该寄生虫的三个基因（、和）序列进行了调查。分析了年龄、性别、采样季节和粪便样本类型（基于其物理特征）的数据。对上述三个基因进行筛选，44个样本（5.6%）呈该寄生虫阳性。聚合酶链反应结果显示，≥1月龄的犊牛以及春季出现水样腹泻的犊牛中该感染的流行率显著更高。对基因序列（87.5%）、（96.2%）和（96.7%）的筛选表明，大多数该寄生虫阳性样本属于E群。4个该寄生虫阳性样本属于人畜共患的A群。本研究强调了持续监测该寄生虫基因突变对于检测犊牛中新出现的人畜共患该寄生虫变体的重要性。
