| [helminth parasites of pirarucu, arapaima gigas (schinz, 1822) (osteoglossiformes: arapaimidae) from araguaia river, state of mato grosso, brazil]. | sixty-five specimens of pirarucu collected in august 2004 from araguaia river, state of mato grosso, brazil, were examined to study their helminth parasites. five species were recorded parasitic arapaima gigas: dawestrema cycloancistrium (monogenea) in gills, nilonema senticosum and goezia spinulosa (nematoda) in the swimbladder and stomach, respectively; caballerotrema brasiliense (digenea) and polyacanthorhynchus rhopalorhynchus (acanthocephala) in the intestine. highest prevalence values were ... | 2008 | 19245767 |
| tissue alterations in the pirarucu, arapaima gigas, infected by goezia spinulosa (nematoda). | five specimens of arapaima gigas caught in the araguaia river (state of mato grosso, brazil) were investigated for helminths in 2004. numerous adult specimens of the rhapidascarid nematode goezia spinulosa were found in stomach ulcers in all the specimens of a. gigas and were surrounded by thickening of the mucosa. the gastric glands of all the fish were necrotic and there was a severe and diffuse inflammatory reaction composed of eosinophils (which were predominant), lymphocytes and rare macrop ... | 2011 | 21961749 |