| contracaecum sp. infection in hoplias malabaricus (moncholo) from rivers and marshes of colombia. | nematode infection indices were recorded in hoplias malabaricus captured in six different rivers and a marsh belonging to the north coast basin of colombia, and from the amazon river, during february 2003-december 2004. preliminary morphological analysis of nematodes indicated the presence of contracaecum sp. parasites were mostly found in the intestinal mesenteries and a very low percentage in muscle. parasite prevalence in all sampling locations at the north of colombia was 100%, whereas in th ... | 2006 | 16650597 |