Pond-river interactions in a pampean basin /Salado river, Buenos Aires, Argentina): an approach

Se realizó una investigación en el Río Salado en conjunto con la laguna San Miguel que se conecta con el río. Las condiciones fisico-químicas eran similares para los dos cuerpos de agua. En condiciones de alto nivel, concentraciones de fósforo y plancton. La influencia del río determinó niveles altos de nutrientes y polifenoles. En diciembre 1995-marzo 1996 hubo una sequía y la laguna se secó por completo y el flujo del río no pasó de los 100m3/segundo. La fuente del fósforo y polifenoles es el río, así que en condiciones de aguas bajas esas concentraciones disminuyeron. El plancton demostró afinidad a condiciones de alta salinidad

Campylobacter jejuni/coli in commercially reared beagles: prevalence and serotypes.

A 5 year longitudinal study involving 187 commercially reared beagles from three suppliers was undertaken to determine prevalence and serotypes of Campylobacter jejuni and C. coli. Campylobacter jejuni or C. coli was isolated from the feces in 62 of 177 asymptomatic beagles and 8 of 10 dogs with diarrhea for an overall prevalence of 37%. A total of 36 isolates were serotyped on the basis of thermostable antigens with 20 antisera prepared against frequently occurring serotypes isolated from humans with campylobacter associated enteritis (15 C. jejuni, 5 C. coli serotypes). Of these isolates, 17 (47%) serotyped with antisera to 7 C. jejuni serotypes frequently isolated in human cases of enteric campylobacteriosis (serotypes 1, 4, 10, 16, 18, 19, 37). One C. coli reacted to antisera 24, 34, 37, one strain of C. coli to antisera type 37, and another C. coli to antisera type 34. All three C. coli belonged to serotypes frequently encountered in diarrheic human patients.