Raised serum calcium in tuberculosis patients in Africa.
Reports of raised serum calcium in the presence of tuberculosis have tended to be from centres where sunlight is plentiful. U.K.-based data have suggested that normocalcaemia prevails. In a prospective study of 15 African patients with pulmonary tuberculosis, resident in East Africa, corrected serum calcium was significantly lower in a control healthy group (2.59 mmol/l +/- 0.08 and 2.49 +/- 0.06 mmol/l respectively: P less than 0.001). Serum 25-hydroxy vitamin D was significantly lower in the patient group (median, 15.9 ng/ml, range 6.7-35.7) compared with the control group (median 26.2 ng/ml, range 10.5-45.9, P less than 0.05). No significant difference was found between patients and controls for 1,25-dihydroxy vitamin D or parathyroid hormone. No correlation was found between serum calcium and 1,25 (OH)2 D3. Serum albumin showed a negative correlation with radiographic extent of disease and with extent of cavitation. Where sunlight is plentiful, relatively high serum 25-hydroxy Vitamin D may give rise to raised serum calcium in the presence of tuberculosis.
Department of Thoracic Medicine, Llandough Hospital, Penarth, South Glamorgan, U.K.
P D
PD
Davies
H A
HA
Church
R C
RC
Brown
J S
JS
Woodhead
D000328:Adult; D002118:Calcium / Q000097:blood; D006801:Humans; D006934:Hypercalcemia / Q000209:etiology*; D008297:Male; D010281:Parathyroid Hormone / Q000097:blood; D012709:Serum Albumin / Q000378:metabolism; D014397:Tuberculosis, Pulmonary / Q000097:blood*; D014807:Vitamin D / Q000097:blood
D010281:Parathyroid Hormone; D012709:Serum Albumin; D014807:Vitamin D; D002118:Calcium