Biomedical subjects
Publications and source records attributed to K A Krishnamachari.
Nutritional anaemia is a major public-health problem in many parts of the world, and iron deficiency appears to be the most important cause. The immune response is believed to be impaired in anaemia. The results of the present study, carried out in young children, indicate that both the cell-mediated immune response and the bactericidal activity of leucocytes are impaired when levels of haemoglobin fall to 10 g/dl or less.
Circulating levels of immunoreactive parathyroid hormone (PTH) were estimated in fifteen normal subjects and twenty-five subjects suffering from the skeletal fluorosis, ten of whom had associated endemic genu valgum. Levels of PTH were high in all the subjects with fluorosis as compared to normals, but among fluorosis subjects, those who had endemic genu valgum had values strikingly higher than those without. It is suggested that secondary hyperparathyroidism may have a significant role to play in the pathogenesis of osteoporosis seen in patients with endemic genu valgum.
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Parts of Western India have experienced an outbreak of hepatitis affecting man and dogs and characterised by jaundice, rapidly developing ascites, portal hypertension, and a high mortality-rate. The disease was associated with the consumption of maize contaminated heavily with Aspergillus flavus. Analysis of contaminated samples showed that affected people could have consumed between 2 and 6 mg. of aflatoxin daily over a period of a month. A specimen of liver obtained at necropsy showed bileduct proliferation and giant cells. The disease appears to be a result of aflatoxicosis.
The effect of daily administration of 2 g of vitamin C on urinary excretion of fluoride in patients suffering from endemic fluorosis was studied. Urinary fluoride excretion was found to be constant over a period of 4 weeks in each patient. The results suggested that vitamin C does not influence the rate of resorption of fluorotic bone in man.
Bone density measurements were made in 15 paried mothers and neonates of well-to-do group and in 21 age and parity matched mothers and their neonates of the poor socioeconomic community using radiodensitometry. Radiodensities of all bones studied in the mothers and neonates of high income group were significantly higher than those of corresponding bones of the mothers and neonates of poor community. This may be a reflection of maternal malnutrition on the intrauterine development of the bone. A close correlation was observed between the bone density of mothers and neonates in the poor income group. Bone density had no relation with birth weight.
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