| potential for the spread of fasciola hepatica in cattle in oklahoma. | in 29 central and western oklahoma counties, 42 ranches were investigated for indigenous fasciola hepatica infections and their suitability for the transmission of liver fluke. a 10-year retrospective study of oklahoma cattle based on samples submitted to the oklahoma animal disease diagnostic laboratory also was done. indigenous fascioliasis was found in cattle in 12 counties (9 central and western counties identified in the combined field and retrospective studies and 3 additional eastern coun ... | 1990 | 2329078 |