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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Diminished IgG, but not complement C3 or C4 or factor B, precedes nosocomial bacterial sepsis in very low birth weight neonates.

The significance of low serum IgG and complement proteins in very low birth weight (VLBW; less than 1500 g) neonates is not known. Therefore serum IgG, C3, C4 and Factor B were quantitated weekly by rate nephelometry in 15 VLBW neonates who developed proven nosocomial bacterial or candidal sepsis (Group A) and 27 VLBW neonates who did not develop sepsis (Group B). In the first week of life the serum IgG of neonates in Group A was 295 +/- 33 mg/dl (mean +/- SEM) and in Group B it was 440 +/- 21 mg/dl (P less than 0.01). In the second week, the IgG of Group A was 270 +/- 32 mg/dl and that of Group B was 473 +/- 38 mg/dl (P less than 0.01). If the IgG was less than 350 mg/dl in the first week or less than 230 mg/dl in the second week, the relative risk of acquiring sepsis was greater than or equal to 5 (95% confidence interval in the first week, 1.7 to 11.2). The serum IgG was measured before the onset of sepsis in 14 of the 15 neonates in Group A. In the week before sepsis the IgG of the 14 neonates was less than 440 mg/dl (range, 45 to 433 mg/dl) in all cases, was below the mean IgG of Group B in 12 of 14 cases (P = 0.006 vs. Group B) and was greater than 2 SD below the mean IgG of Group B in 4 of 14 cases (P = 0.0003 vs. Group B).(ABSTRACT TRUNCATED AT 250 WORDS)[1]

References

  1. Diminished IgG, but not complement C3 or C4 or factor B, precedes nosocomial bacterial sepsis in very low birth weight neonates. Lassiter, H.A., Tanner, J.E., Cost, K.M., Steger, S., Vogel, R.L. Pediatr. Infect. Dis. J. (1991) [Pubmed]
 
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