| results of testing for intestinal parasites by state diagnostic laboratories, united states, 1987. | we analyzed results of 216,275 stool specimens examined by the state diagnostic laboratories in 1987; parasites were found in 20.1%. percentages were highest for protozoans: giardia lamblia (7.2%), entamoeba coli and endolimax nana (4.2% each), blastocystis hominis (2.6%), entamoeba histolytica (0.9%), and cryptosporidium species (0.2%). identifications of giardia lamblia increased broadly from the 4.0% average found in 1979, with 40 states reporting increases and seven decreases. most states th ... | 1991 | 1779956 |
| helminth remains from prehistoric indian coprolites on the colorado plateau. | examination of coprolites excavated from archaeological sites in the americas demonstrates excellent preservation of helminth eggs and, in some cases, larvae. to gain an understanding of helminth parasitism in prehistory on the colorado plateau of arizona, new mexico, and utah, 319 coprolites from 5 archaeological sites were analyzed. helminth eggs and larvae were recovered after the coprolites were rehydrated, screened, and sedimented. at a sixth site, soils excavated from 5 rooms used as latri ... | 1987 | 3298603 |