In a group of women, which had children with hereditary isolated and syndromal chest deformations, acute respiratory diseases, tonsillitis or influenza occurred during pregnancy in 42.9 +/- 6.6% and 53.8 +/- 13.8% of cases, respectively, whereas in the control group only 17.8 +/- +/- 7.2% of the women were impaired with identical infectious diseases during pregnancy (P less than 0.02 and P less than 0.05, respectively). Excretion of hydroxyproline was distinctly dissimilar in 22 children with isolated and in 13 children with syndromal chest deformations depending on presence or absence of the above-mentioned infections during pregnancy. Under conditions of these infections the higher level of total hydroxyproline excretion was noted as well as relatively lower content of bound hydroxyproline was detected in those peptides, which appear to be responsible for the content of newly synthesized collagen. The data obtained suggest that acute respiratory diseases, influenza, chronic and acute tonsillitis may impair collagen metabolism in children with hereditary chest deformations as well as that these infectious diseases occurred during pregnancy may increase the risk of the pathology development in the children.
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