SUMMARY A patient with glomerulonephritis and endocarditis is described who had evidence of feline Chlamydia psittaci infection. Treatment with antichlamydial drugs resulted in resolution ofthe glomerulonephritis and the endocarditis. It is recommended that screening for chlamydia is included in the investigation of patients with suspected or obscure endocarditis.Infective endocarditis is often caused by an unusual organism. The management of such cases is much more effective if the identity of the organism has been established (Friedberg, 1964;Hampton and Harrison, 1967).We describe a patient with infective endocarditis and secondary glomerulonephritis in whom there was strong evidence of infection with the feline keratoconjunctivitis agent (Chlamydia psittaci

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Two patients with autosomal dominant polycystic kidney disease (ADPKD) and concurrent glomerulonephritis are described. Both developed nephrotic-range proteinuria and one showed a concomitant acceleration in the rate of decline of renal function. Subsequent open renal biopsy revealed membrano-proliferative type-1 and mesangio-proliferative glomerulonephritis, respectively. Nephrotic-range proteinuria in the presence of ADPKD, with or without an accompanying decline in renal function, should prompt further investigation to exclude coexisting glomerular disease.

Summary:We report three cases of Raynaud's syndrome with digital ischaemic ulceration, in association with carpal tunnel syndrome. In all cases, the aetiology of the Raynaud's syndrome was probably unrelated to the nerve compression. However, symptoms were worse on the side of the median nerve lesion in two patients and worse on the side with the most severe nerve dysfunction in the third; symptoms were relieved by carpal tunnel decompression in two patients. We suggest that carpal tunnel syndrome may exacerbate Raynaud's syndrome and should be considered particularly in patients with asymmetrical digital lesions.

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1. The relationship between various body fluid compartment volumes, plasma renin activity and mean arterial blood pressure was studied in twenty-six patients with chronic renal failure.2. Mean arterial blood pressure was positively correlated with total exchangeable sodium, blood volume and plasma renin activity : there was no significant correlation with either total body water or extracellular fluid volume.3. Multiple regression analysis revealed that plasma renin activity combined with total exchangeable sodium, blood volume, red cell mass or total body water provided a better means of predicting blood pressure than any of the variables taken alone.4. In a second study performed after a period of regular dialysis treatment no correlation was found between mean arterial pressure and either body fluid compartment volumes or plasma renin activity.

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