Isolation and Identification of some Species of Endoparasite Causing Infection in Captive Common Pheasants (Phasianus colchicus. Linné, 1758) in Algeria

Background: Parasitic infections can severely impact the health, productivity, and welfare of captive birds, yet information on their seasonal dynamics in pheasants remains scarce. This study is the first investigation of intestinal parasitism in captive common pheasants (Phasianus colchicus, Linnaeus, 1758) in Algeria, reporting the detection of Hymenolepis spp. and canid-associated parasites, including Ancylostoma spp. and Toxocara spp. Objectives: To assess the prevalence, abundance, and risk factors of endoparasitic infestations in captive pheasants at the Cynegetic Center of Zeralda (CCZ), Algeria. Methodology: Between December 2020 and June 2021, 490 composite fecal samples were collected and analyzed using flotation techniques. Results: A high parasite burden with significant seasonal fluctuations was observed. Parasite richness increased from five species in winter to nine in spring (P < 0.0001). Nematodes were the most prevalent group, followed by protozoa and cestodes. Syngamus spp. showed the highest abundance, rising from 35.29% in winter to 49.57% in spring (P < 0.0001). Capillaria, Ascaridia, and Heterakis spp. dominated in winter, whereas Trichuris, Eimeria, Ancylostoma, Toxocara, and Hymenolepis spp. were mainly detected in spring at lower levels. Several parasites, particularly Ancylostoma, Toxocara, and Eimeria spp., have zoonotic potential, posing risks to workers, domestic animals, and wildlife interacting with the facility. Conclusion: The cohabitation of multiple avian species may facilitate cross-transmission. These findings highlight the need for routine surveillance, targeted deworming, and strict biosecurity to protect staff, safeguard other captive and wild animals, and minimize zoonotic transmission.