Acanthogyrus (Acanthosentis) tilapiae parasites were collected from the intestines of 300 fish belonging to three tilapia species sourced at the River Nile, Giza, Egypt. The proboscis of the parasite was characterized by three rows of hooks that curved towards the posterior of the body. The first row is supported by unmodified hooks. The parasite tegument has a series of alternative folds and a...

The present study describes the ultrastructure of the interface between naturally infected isopods, Asellus aquaticus (L.), from the River Brenta (northern Italy) and larvae of Acanthocephalus anguillae (Müller, 1780) Lühe, 1911. A fully developed larva of this helminth occupies the host’s hemocoel and induces displacement of its internal organs. A transparent acellular envelope ranging in thic...

The effect of acanthocephalan parasites (Profilicollis spp.) on the hiding behaviour during low tide of two species of shore crabs (intermediate hosts), Macrophthalmus hirtipes (Brachyura: Ocypodidae) and Hemigrapsus crenulatus (Brachyura: Grapsidae), was examined at Blueskin Bay, South Island, New Zealand. Exposed M. hirtipes were found to have significantly higher infection levels than did hi...

The aim of this study was to investigate the post-cyclic transmission of Acanthocephalus tumescens (von Linstow, 1896) from Galaxias maculatus Jenyns to Oncorhynchus mykiss (Walbaum). Wild G. maculatus naturally infected with A. tumescens were fed to cultured rainbow trout, which were sacrificed at the second, third and fourth weeks post infection. Normally attached male and female acanthocepha...

The launch of The Journal of Parasitology (JP) by Henry Baldwin Ward in September 1914 was a historical landmark that witnessed the passage of the torch of acanthocephalan work, especially higher taxonomy, from Europe to the United States, with the excep-tion of the works of Anton Meyer, Yves Golvan, and a few Russian workers in the early twentieth century. At that juncture, there were only two...

Secure attachment to host tissues is essential for survival and reproduction in parasitic organisms. The production of elaborate attachment structures must be costly, however, and investments in attachment should be approximately proportional to the likelihood that a parasite will be dislodged. In the present study, relative investments in attachment as a function of body size and the type of h...

One hundred prairie rattlesnakes, Crotalus viridis viridis, from western South Dakota were examined for evidence of helminth parasites. Twenty-one percent were infected with 1 of 6 parasite species. The following species were recovered: Manodistomwn sp., Mesocestoides sp., Physaloptera sp., 2 different species of oligacanthorhynchid acanthocephala, and an unidentified species of acanthocephalan...