Résumé
Polymorphonuclear neutrophils play an important role in host defense mechanism. To assess PMN function in neonate a micromethod using only a few drops of blood was standardised. PMN adherent to coverslip were incubated with bacteria and using a differential staining with Acridine Orange (AO) phagocytic and bactericidal capacity were estimated.
Sujets)
Activité bactéricide du sang , Humains , Nouveau-né/sang , Granulocytes neutrophiles/physiologie , Phagocytose/physiologieRésumé
In vitro effect of intravenous immunoglobulin (IVIG), Intraglobin F, on serum opsonic activity against Staphylococcus aureus was studied in 26 full term normal healthy neonates and 18 intrauterine growth retarded (IUGR) neonates by the polymorphonuclear leucocyte overlay method (requiring only a few drops of blood). Cord IgG and IgM levels were determined by single radial immunodiffusion. Serum opsonic activity against Staph. aureus was significantly lower in the IUGR neonates (49.1 +/- 0.89), as compared to that in normal neonates (61.96 +/- 0.73; P less than 0.001). Immunoglobulin supplementation in vitro at a concentration of 5 g/dl significantly enhanced the opsonic activity of IUGR neonate sera. Cord IgG levels of IUGR neonates were significantly lower (P less than 0.01) than IgG levels of normal neonates. No significant difference was observed in cord IgM levels between the normal and IUGR neonates.
Sujets)
Activité bactéricide du sang , Femelle , Retard de croissance intra-utérin/sang , Humains , Immunoglobulines/pharmacologie , Nouveau-né , Injections veineuses , Mâle , Opsonines/physiologie , Valeurs de référenceRésumé
The records of seventeen neonates (13 males and 4 females) with osteomyelitis and septic arthritis, who were admitted over a 3 year period, were reviewed. Neither prematurity nor low birth weight seemed to be a predisposing factor. The majority of the neonates (88.2%) had some antecedent illness or were subjected to certain procedures in the neonatal period. Paucity of movement of limb, fever and local swelling of the joint were the most frequent presenting symptoms. Deep soft tissue swelling was the frequently noted radiographic change (58.8%). Bone scintigraphy was abnormal in 7 out of 11 cases. Of the 21 sites involved, femur and humerus accounted for 76.1% of cases. Four of seventeen neonates had multiple bone involvement. Arthritis was present in fifteen neonates. Of the organisms isolated, Staphylococcus aureus was the commonest.