The effect of controlled daily blood loss on the haemoglobin concentration, erythrocyte count and reticulocyte count of male rats.

0.2, 0.6 or 1 ml of blood was removed from rats once daily on 17 consecutive days. Haemoglobin concentration and erythrocyte counts fell rapidly until day 7 or 9 and were reflected after day 2 by an increase in reticulocytes. From 9 to 17 there was little further change and 14 days after the last bleed the haematological results were within the normal range. The increase in haemoglobin production correlated well with the increase in reticulocyte numbers.

Effect of timing of cefuroxime dosage on its protection of rats against gentamicin nephrotoxicity.

The neophrotoxic effect on rats of once daily treatment with 40 or 45 mg gentamicin/kg/day for ten days was substantially reduced by administration of 4 g cefuroxime/kg/day, either at the same time or eight hours later. This dosage of cefuroxime was protective when given for only two consecutive days starting on the first to third days of gentamicin treatment, but enhanced gentamicin nephrotoxocity when started on the sixth or subsequent days.