| risk of babesiosis and anaplasmosis in different ecological zones of santa cruz department, bolivia. | a cross-sectional study was done of seroprevalence of babesia bigemina, b.bovis, and anaplasma marginale in cattle from eastern bolivia, to characterise the risk of tick-borne disease in three ecological zones. nineteen farms were sampled in the subtropical humid zone, 13 in the dry subtropical zone and nine in the lower western valleys of the andean massif. the enzyme-linked immunosorbent assay was used. all three pathogens were widespread. for b. bovis, seroprevalences were high (75-78%) in th ... | 2000 | 11027858 |