Morphometric and richness analysis of free-living and parasite taxa-invading street wetlands in Port Said, Egypt.

Background: Protists and helminths are considered the main organisms invading different cultures, especially aquatic organisms. Morphometric characteristics remain the most trustworthy descriptors of species identification or, more broadly, pattern recognition. Aim: This study aimed to provide morphological descriptions of the most prevalent Protista and helminths found in various street wetlands in Port Said, Egypt. Methods: This study collected three water samples per area each month. The samples were sent to the Parasitology Laboratory at Port Said University, Egypt. The samples were analyzed in two ways according to organism size. Large helminths were observed within 24 hours using a microscope, and their movements were recorded. Protists and helminth eggs were isolated by filtering water through a 0.45 μm cellulose acetate filter, followed by centrifugation. The isolated organisms were counted and imaged. Results: Nine dominant organisms were identified in the collected samples, including five parasitic species ( Conclusion: The street wetlands in the surveyed area contain various free-living and pathogenic taxa. There is a need to link the presence of these organisms to physicochemical analyses. Future studies should prioritize broader geographic sampling, the integration of molecular techniques, and the exploration of host-parasite relationships.