Epidemiological survey of gastrointestinal helminths and protozoa in Testudines from Sardinia, Italy

The order Testudines comprises some of the most endangered groups of vertebrates. Under specific circumstances, infectious and parasitic diseases may affect the survival and fecundity of these animals, potentially threatening Testudines populations. In Sardinia, besides the three species of tortoises present in the wild (Testudo hermanni, Testudo graeca and Testudo marginata), many others are kept as pets. However, epidemiological studies on these animals have not been conducted so far. Thus, the aim of the work was to investigate the presence of gastrointestinal parasites in captive and wild tortoises of Sardinia, Italy, with particular regard to those of zoonotic importance. For the 215 animals examined (n = 36 wild caught and n = 179 private-owned), fecal samples were collected and processed by flotation and modified Ziehl-Neelsen technique. An overall prevalence of 81.4% for endoparasites was detected, with oxyurids being the most prevalent (74.4%), followed by Nyctotherus spp. (18.6%), Cryptosporidium spp. (12.6%), Angusticaecum spp. (2.8%), strongyles (0.9%), Balantidium spp. (0.9%), coccidia (0.9%), cestodes (0.5%), and Giardia spp. (0.5%). Data suggest that tortoises are affected by a great variety of endoparasites, and further molecular analysis are required to assess the impact of Cryptosporidium and Giardia species in these hosts. Therefore, regular health screenings are of importance for the management of these animals and for preventing emerging infectious diseases.