[Bordetella pertussis in adolescent students in Mexico City].

Objective: To estimate seroprevalence of Bordetella pertussis in students and their community.

Methods: A total of 12,273 adolescent students aged 12 to 15 years from 14 public high schools in Mexico City were studied from September 2002 to March 2003. Nasopharyngeal samples were collected from those adolescents with whooping cough for more than 14 days.

Beneficial effect of retinoic acid on the outcome of experimental acute renal failure.

Background: Retinoic acid (RA) exerts beneficial effects on vascular remodelling and experimental nephritis, and plays a role in kidney development. Pathological changes caused by acute renal failure (ARF) result in high mortality. We determined whether RA ameliorates ARF-induced pathology caused by potassium dichromate (PD).