Bibliography indicates that the larvae of the genus Contracaecum are of zoonotic importance. These papers are based on a single clinical case whose conclusions are doubtful and should be confirmed. In the present work, the results of experimental infections in Balb/cAnN mice, with L3 juvenile of the Contracaecum ogmorhini Johnston & Mawson, 1941 complex, are reported. The helminths were obtained in the stripped weakfish, Cynoscion guatucupa (Cuvier, 1830), the second most important commercial fishery resource in Argentina. The parasites were characterized by morphological and molecular criteria. Their population descriptors were established on a sample of 112 hosts. The potential for migration to the skeletal muscle of the fishes was evaluated and the background on experimental infection of Contracaecum spp. in mammalian hosts is discussed. It is concluded that the third-stage juveni...

No previous studies were carried out on aspects of the helminth assemblages of Seriolella porosa. The present study aims to analyze the metazoan parasite of S. porosa and establish the relationship between the parasitic variations and both fish size and sex. A total of 101 specimens of S. porosa from San Matías Gulf, Argentina were examined between September and October 2006. Thirteen species were reported with a total of 3366 parasites. Lecithocladium cristatum was the most prevalent, dominant and abundant species. The average species richness was 3.2 ± 1.20. The evenness showed an inverse correlation with the total number of parasites and did not reveal differences between host sexes. None of the parasite species showed interspecific associations with each other. The average richness of the infracommunity was significantly less than the component community. The helminth community of ...