Geochelone carbonaria is one of the two species of tortoises that have been described in Venezuela. We report herein a severe parasitic infection with strongylid and pinworm nematodes in 15 red-footed tortoises, G. carbonaria from Upata, State of Bolivar, Venezuela. Animals were obtained from the owner of a cattle ranch in the savannah and allocated in a restricted area. Two months later, animals became ill, displaying anorexia, lethargy and diarrhea. Faeces were fluid, mucoid and haemorragic. Five animals were found dead. At necropsy, caecum and colon were enlarged due to the presence of hundreds of small nematode parasites in their lumen; mucosal haemorragy and fibrin tracts in the liver were also observed. Faecal samples and part of the intestinal content were analyzed in the laboratory. Faecal examination showed a severe strongylid and pinworm infection. Intestinal content was abunda...