Intestinal parasites are a health problem in Peru. The aim of this study was to determine the prevalence of intestinal parasites in 66 residents of two towns in Yurimaguas: Farmhouse Grau (Location #1) and four settlements: Buena Vista, La Molina, Natividad and Madeiros (Location #2), Alto Amazonas, Loreto, Peru. An observational, analytical, descriptive cross-sectional and prospective study was performed from February to March 2010. Parasitological analyses were done using the direct method and temporary staining with Lugol. For the differentiation of species of Ancylostoma, Harada-Mori method was used. A total of 10 parasitic protozoa and five helminths were detected. Among the protozoa, the most prevalent were Entamoeba coli (Grassi, 1879) (48.4%) and Giardia lamblia (Lamb, 1859) (16.6%). The most prevalent helminths were Ascaris lumbricoides Linnaeus, 1758 (43.8%) and Trichuris trich...

The aim of this research was to use the benthic macroinvertebrates (MIB) and toxicological assessment tests to evaluate the water and sediment quality of the Rimac river (Lima-Peru) in wet and dry seasons in 2009. Twelve sampling stations (E1 to E12) were established, considering the sources of contamination. At each station, physical and chemical data, MIB, and water and sediment toxicity with Daphnia magna and Chironomus calligraphus were measured. The wet season had higher pH; however, higher values ​​of specific conductivity, total solids, dissolved oxygen and transparency were observed in the dry season. Differences in the abundance of Planorbidae, Baetidae, Chironomidae, Tipulidae and Empididae were observed between wet and dry seasons. The diversity and evenness index were higher in wet season, but the dominance and abundance index were higher in the dry season. The dendrogram...

The aim of this research was to use the benthic macroinvertebrates (MIB) and toxicological assessment tests to evaluate the water and sediment quality of the Rimac river (Lima-Peru) in wet and dry seasons in 2009. Twelve sampling stations (E1 to E12) were established, considering the sources of contamination. At each station, physical and chemical data, MIB, and water and sediment toxicity with Daphnia magna and Chironomus calligraphus were measured. The wet season had higher pH; however, higher values ​​of specific conductivity, total solids, dissolved oxygen and transparency were observed in the dry season. Differences in the abundance of Planorbidae, Baetidae, Chironomidae, Tipulidae and Empididae were observed between wet and dry seasons. The diversity and evenness index were higher in wet season, but the dominance and abundance index were higher in the dry season. The dendrogram...