| [epidemiology of diphyllobothriasis in the valdivia river basin, chile]. | in the valdivia (chile) river basin 1,295 inhabitants of 6 riverside districts were examined between march and october 1987 and showed a 1.2% of prevalence by diphyllobothrium in the districts of riñihue and las huellas. prevalence of 5.3% and 9.8% respectively were registered in dogs of the districts of riñihue and malihue. no cat or pig infection was observed in the different districts. the parasites recovered after the treatment were identified as diphyllobothrium latum. human infection by d. ... | 1989 | 2814310 |