Immunoglobulin levels, serum subtropics

Normal Values of Serum Immunoglobulin Levels in Subtropical and Tropical... 

It is likely that the lack of agreement of results concerning the immunoglobulin levels in children with PCM stem from the fact that the values found in children in the subtropical and tropical populations are often compared with values from the temperate regions, where it is now abundantly clear that the serum immunoglobulin patterns in the white race differs significantly from patterns in the black race. Furthermore, the nutritional status of each group of children must vary from country... 

Based on the international protein reference CRM 470, the recommended interim reference interval for albumin in serum of adults 20 to 60 years of age is 35 to 52g/L (3.5 to 5.2 g/dL). Albumin levels reach adult levels around 20 to 30 weeks of gestation and remain relatively constant until at least 20 years of age. Levels then slowly decrease with age in both sexes. Levels are lower in individuals living in the subtropics and tropics, probably because of higher immunoglobulin levels secondary to infection or parasitic infestation. Levels are very posture dependent, increasing by up to 10% to 15% if the individual is standing. 

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