Serum phosphorus concentrations in dogs with leishmaniosis at different stages of chronic kidney disease.

Serum phosphorus concentrations were measured in 155 dogs with leishmaniosis at different stages of chronic kidney disease (CKD), and in 54 healthy dogs. CKD was classified into six stages, as follows: stage 0 (dogs with no evidence of CKD), serum creatinine (SCr) less than 125 micromol/l and urine protein:creatinine ratio (UPC) less than 0.2; stage 1A, SCr less than 125 micromol/l and UPC 0.2 to 0.5; stage 1B, SCr less than 125 micromol/l and UPC over 0.5; stage 2, SCr 125 micromol/l to 180 micromol/l; stage 3, SCr 181 micromol/l to 440 micromol/l; stage 4, SCr over 440 micromol/l. The dogs' serum phosphorus concentrations correlated significantly with the severity of CKD (P<0.001), and hyperphosphataemia (>1.8 mmol/l) affected 12 per cent, 11.8 per cent, 50 per cent, 76.9 per cent and 100 per cent of the dogs at stages 1A, 1B, 2, 3 and 4, respectively.