The scarce information on the helminth fauna in otariids from the Southeastern Pacific comes mainly from stranded individuals or killed for that purpose. In this study, we compared the abundance and composition of enteroparasitic assemblages of Otaria flavescens using coprological techniques. Three sampling localities from north to south spanning 2,200 km off the Chilean coast were considered (Iquique, Viña del Mar, and Talcahuano). In all, 60 fecal samples were collected, and eggs belonging to 5 taxa were found in 91.6% of the samples. They were the anisakid nematodes Contracaecum and Pseudoterranova, the cestode Adenocephalus (syn. Diphyllobothrium), the trematode Ogmogaster, and the acanthocephalan Corynosoma. Samples from southern Chile (Talcahuano) showed the highest prevalence. Adenocephalus eggs had the highest prevalence and abundance in Iquique and Talcahuano, whereas Ogmogaster was the less prevalent and abundant in all sampling localities. Corynosoma eggs had similar prevalence and abundance among sampling localities, and Pseudoterranova eggs were absent in Iquique and with median prevalence values in Viña del Mar and Talcahuano. Thus, the composition of parasite egg assemblages was different between sampling localities. These differences between sampling localities may help to explain differential records of some zoonotic parasitoses such as pseudoterranovosis and diphyllobothriosis in Peru and Chile, where consumption of raw or marinated fish (ceviche) is common. For example, the lower diversity of parasite egg assemblages in the northern Chilean coast may be due to the absence or lower abundance of first intermediate/paratenic hosts of Pseudoterranova.

关于东南太平洋 otariids 蠕虫动物群的稀缺信息主要来自滞留或为此目的被杀的个体。在这项研究中，我们使用粪便学技术比较了Otaria flavescens 肠道寄生虫组合的丰度和组成。考虑了距离智利海岸 2,200 公里从北到南的三个采样地点（伊基克、比尼亚德尔马和塔尔卡瓦诺）。共采集粪便样本60份，91.6%的样本中检出虫卵属于5个类群。他们是anisakid线虫Contracaecum和Pseudoterranova中，绦虫Adenocephalus（同义词裂头），吸虫Ogmogaster，和棘头颅棒状瘤。来自智利南部（塔尔卡瓦诺）的样本显示出最高的流行率。在伊基克和塔尔卡瓦诺，腺脑虫卵的流行率和丰度最高，而Ogmogaster在所有采样地点的流行率和丰度都较低。Corynosoma卵在采样地点之间具有相似的流行率和丰度，而Pseudoterranova伊基克没有鸡蛋，比尼亚德尔马和塔尔卡瓦诺的患病率中位数。因此，寄生虫卵组合的组成在采样地点之间是不同的。采样地点之间的这些差异可能有助于解释一些人畜共患寄生虫病的差异记录，例如秘鲁和智利的假性寄生虫病和双叶丝虫病，在那里食用生鱼或腌鱼（酸橘汁腌鱼）很常见。例如，智利北部海岸寄生虫卵组合的多样性较低可能是由于Pseudoterranova的第一中间/平行宿主的缺失或丰度较低。