| [prevalence of intestinal parasitic infections in nursery schools from ciego de avila province, cuba. 1989-1993]. | the prevalence of intestinal parasitsm in nursery schools from ciego de avila province was annually avaluated during 1989-1993. the percentage of infected children ranged from 16.6% to 31.6%. an increase of frequence of infection was observed from 1991. protozoa were more predominant than helminths. in the whole five-year period studied giardia intestinalis had a higher prevalence (19.6%) followed by entamoeba histolytica (3.0%). the nematode most frequently found was trichuris trichiura (0.5%). | 1999 | 10488590 |