Instituto de Ciências e Tecnologia das Águas-ICTA, Universidade Federal do Oeste do Pará-UFOPA, Santarém, PA, 68040‑255, Brazil.
Laboratório de Estudos Morfofisiológicos e Parasitários, Universidade Federal do Amapá-UNIFAP, Macapá, AP, 68903-419, Brazil.
Acta Parasitol. 2024 Mar;69(1):1058-1066. doi: 10.1007/s11686-024-00816-z. Epub 2024 Mar 2.
Sampling was performed at three sites in the Tapajós River mouth, Pará State, Brazil, and an aliquot of blood was collected from each turtle by post-occipital dorsal vein puncture. The aliquots were used for the determination of hematological parameters and for the study of hemoparasites in the blood samples.
A total of 37 turtles were sampled: 21 Podocnemis expansa, three P. sextuberculata, nine P. unifilis, and four P. erythrocephala. Parasitological analyses showed inclusions in erythrocytes compatible with Haemogregarina sp., representing an overall prevalence of parasitized animals of 64.8% with an average of 94,789 parasites/ml of blood. In this study, the evolutionary forms of Haemogregarina spp. from trophozoites, pre-meronts, meronts, and mature and immature gamonts were observed in three species of freshwater turtle species, and one morphotype of the parasite with high similarity to Haemogregarina podocnemis has been observed.
Despite recent research on freshwater turtles, this study provides new information on the intensity of blood parasite infection and hematological parameters of free-living animals, highlighting the need for studies on infected and uninfected animals from the same population.
在巴西帕拉州塔帕若斯河口的三个地点进行采样，通过后枕部背静脉穿刺从每只海龟中采集一份血液样本。这些样本用于测定血液学参数，并研究血液样本中的血液寄生虫。
共采集了 37 只海龟：21 只膨颈龟、3 只六棱龟、9 只南美棱背龟和 4 只红耳龟。寄生虫学分析显示红细胞内包涵体与血孢子虫属（Haemogregarina）相符，表明寄生虫感染动物的总流行率为 64.8%，平均每毫升血液中有 94789 个寄生虫。在这项研究中，从三种淡水龟种的滋养体、前裂殖体、裂殖体、成熟和未成熟裂殖体中观察到了 Haemogregarina spp. 的进化形式，还观察到一种与 Haemogregarina podocnemis 高度相似的寄生虫形态型。
尽管最近对淡水龟进行了研究，但这项研究提供了关于自由生活动物血液寄生虫感染强度和血液学参数的新信息，强调了需要对来自同一群体的感染和未感染动物进行研究。
