Morphology and genetics of Anadenanthera colubrina var. cebil (Fabaceae) tree from salta (Northwestern Argentina).

Anadenanthera colubrina var. cebil is an important tree species for its cultural, economic, and medicinal uses in South America. In order to characterize A.

Early diagnosis of congenital Trypanosoma cruzi infection using PCR, hemoculture, and capillary concentration, as compared with delayed serology.

Congenital Trypanosoma cruzi infection is a highly pathogenic and underreported condition. Early recognition is essential for effective treatment. Umbilical chord blood from newborns (n = 302) to infected mothers was analyzed with microhematocrit, hemoculture, and PCR methods.

Targeted deletion of the gp72 gene decreases the infectivity of Trypanosoma cruzi for mice and insect vectors.

The infective behavior of a mutant Trypanosoma cruzi clone, carrying a targeted deletion of the gp72 gene, was studied in the insect vector Triatoma infestans and in mice. After feeding T. infestans with complement-resistant forms (CRF) of Ynull and wild-type clones, it was observed that the number of parasites released in the bug's feces was reduced to less than 1% in the mutant clone.