This study was designed to examine the pathogenesis of the excretory defect produced by bilateral ureteral obstruction in the rat. After release of obstruction of 24 hr duration glomerular filtration rate was reduced to 20% of normal. Free flow proximal tubular pressure was normal, excluding residual obstruction as a cause of depressed filtration, and indicating that an intrarenal hemodynamic a...

BACKGROUND The genus Hoplolaimus Daday, 1905 belongs to the subfamily Hoplolaimine Filipiev, 1934 of family Hoplolaimidae Filipiev, 1934 (Krall 1990). Daday established this genus on a single female of H. tylenchiformis recovered from a mud hole on Banco Island, Paraguay in 1905 (Sher 1963​, Krall 1990). Hoplolaimus species are distributed worldwide and cause damage on numerous agricultural cro...

The excretory bladder epithelium of the Ochetosoma aniarum (Leidy, 1891) metacercaria undergoes drastic morphological changes within 24 hours of cercanal penetration into tadpoles. The previously smooth luminal surface develops numerous folds and lamellar structures. The spongiform granules so common in cercariae disappear, and simultaneously calcareous concretion formation begins. The concreti...

Complications of surgical aspect and which may occur after renal homotransplantation following the classical techniques in the vascular anastomosis as well as in the reestablishment of the continuity of the urinary excretory tract, and which jeopardize the future of a transplanted kidney are analysed. The authors describe the technique followed in a series of cases consisting of the conservatio...

The aim of this study was to examine the relative contribution of both cyclooxygenase (COX) isoforms in producing the prostaglandins (PG) involved in the regulation of renal function, when nitric oxide (NO) synthesis is reduced. In anesthetized dogs with reduction of NO synthesis, the renal effects of a nonisozyme-specific COX inhibitor (meclofenamate) were compared with those elicited by a sel...