[Associations between geohelminths and socioenvironmental conditions among different human populations in Argentina].

Objectives: To analyze the relationship between the geohelminth species found in urban, suburban, and rural areas of the Buenos Aires and Misiones provinces of Argentina, and the socioenvironmental conditions that promote infection by these parasites.

Methods: This was a cross-sectional study that analyzed 700 human fecal samples taken from 319 families residing in an urban population (UP) and two suburban ones (SUP1, SUP2) in the Province of Buenos Aires, and a rural one in Misiones (RP). Thirty-five samples of dog feces and 205 earth samples were taken, plus surveys were performed of the socioenvironmental characteristics of the study areas.

Treatment of experimental chronic chagas disease with trifluralin.

We tested trifluralin against Trypanosoma cruzi in a model of chronic Chagas disease in mice. CF1 mice (n=148) were intraperitoneally infected with 10(5) trypomastigotes of T. cruzi, H510C8C3 clone.

Lactobacillus johnsonii La1 antagonizes Giardia intestinalis in vivo.

This study describes the in vivo activity of Lactobacillus johnsonii La1 (NCC533) in Giardia intestinalis-infected gerbils (Meriones unguiculatus). Daily administration of lactobacilli in the drinking water from 7 days before inoculation with Giardia trophozoites efficiently prevented G. intestinalis strain WB clone C6 from infecting gerbils.