Abstract：
METHODS: 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.
RESULTS: 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.
CONCLUSIONS: 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.
RESULTS: 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.
CONCLUSIONS: 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.
摘要：
方法：在Tapajós河口的三个地点进行采样，帕拉州,巴西,通过枕背静脉穿刺从每只海龟中收集等分血液。等分试样用于确定血液学参数和用于研究血液样品中的血液寄生虫。
结果：总共对37只海龟进行了采样：21只Podocnemisexpansa，三个六结核分枝杆菌，九个P.unifilis，和四个红脑原虫。寄生虫学分析显示，红细胞中的内含物与Haemogregarinasp。,代表寄生虫的总体患病率为64.8％，平均为94,789寄生虫/ml血液。在这项研究中,Haemogregarinaspp的进化形式。来自滋养体，pre-meronts,Meronts,在三种淡水龟物种中观察到成熟和未成熟的配子，并观察到了一种与PodocnemisHaemogregarina高度相似的寄生虫形态。
结论：尽管最近对淡水海龟进行了研究，这项研究为自由生活动物的血液寄生虫感染强度和血液学参数提供了新的信息，强调需要对来自同一种群的感染和未感染动物进行研究。
结果：总共对37只海龟进行了采样：21只Podocnemisexpansa，三个六结核分枝杆菌，九个P.unifilis，和四个红脑原虫。寄生虫学分析显示，红细胞中的内含物与Haemogregarinasp。,代表寄生虫的总体患病率为64.8％，平均为94,789寄生虫/ml血液。在这项研究中,Haemogregarinaspp的进化形式。来自滋养体，pre-meronts,Meronts,在三种淡水龟物种中观察到成熟和未成熟的配子，并观察到了一种与PodocnemisHaemogregarina高度相似的寄生虫形态。
结论：尽管最近对淡水海龟进行了研究，这项研究为自由生活动物的血液寄生虫感染强度和血液学参数提供了新的信息，强调需要对来自同一种群的感染和未感染动物进行研究。
