RESUMO
The total serum IgE levels and the presence of anti-Staphylococcu aureus, anti-Streptococcus pneumoniae and anti-Moraxella catarrhalis specific IgE antibodies were studied in 34 asthmatic children (aged 1-12 years). Eleven of them also suffered also from subacute or chronic sinusitis. Total and specific IgE were determined by radioimmunoassay in solid phase. The total serum IgE levels were increased in 82.3% of the cases. It was observed that 73.5% of the children had detectable specific IgE antibodies to one or more bacteria. Anti-Streptococcus pneumoniae IgE and anti-Moraxella catarrhalis IgE were observed more frequently than anti-Staphylococcus aureus IgE antibodies. There was no correlation among these results. The percentage of cases with increased total serum IgE levels and detectable specific antibacterial IgE was higher in those children who did not have sinusitis. In this group anti-Streptococcus pneumoniae IgE was the most frequent finding. The detection of specific antibacterial IgE is not sufficient to explain the physiopathologic role of such antibodies in the children with asthma.
Assuntos
Anticorpos Antibacterianos/imunologia , Especificidade de Anticorpos/imunologia , Asma/imunologia , Imunoglobulina E/imunologia , Moraxella catarrhalis/imunologia , Staphylococcus aureus/imunologia , Streptococcus pneumoniae/imunologia , Anticorpos Antibacterianos/sangue , Asma/metabolismo , Criança , Pré-Escolar , Feminino , Humanos , Imunoglobulina E/sangue , Lactente , MasculinoRESUMO
The presence of specific IgE antibodies directed against common microorganisms was analyzed in a population of children. These antibodies included Escherichia coli, Proteus spp., Pseudomonas spp., Klebsiella spp., Streptococcus spp. and Staphylococcus spp. The determination of these antibodies was done by radioimmunoassay. Comparisons were made according to the parameters of age and total IgE levels. These antibodies were found in a high proportion of the cases. Statistical analysis demonstrated that the different specific IgE antibodies were present in all children, none showing special relevance. All of the antibodies studied were found to be present in a higher number of cases in the groups of older children, and in the group of children with increased total IgE levels, a significantly higher number of cases with antibacterial specific IgE antibodies was observed. The presence and the variety of the antibodies might be conditioned by individual as well as environmental factors. The role of antibodies is not well known. Although they are frequently found in allergic children, there have not been enough cases studied to establish their involvement in allergy. Understanding the role of antibodies might be of interest in the study of allergic processes exacerbated by bacterial infections.
Assuntos
Anticorpos Antibacterianos/sangue , Imunoglobulina E/sangue , Fatores Etários , Argentina , Criança , Pré-Escolar , Feminino , Humanos , Lactente , MasculinoRESUMO
The relationship between ingestion of cow's milk and lymphocyte transformation in cow's milk allergic children was studied. Fifty-six children were selected. Nineteen of them suffered from cow's milk hypersensitivity (HCM); 22 were allergic to several agents except to cow's milk (HOE) and 15 normal and healthy children composed the control group (NH). Lymphoblastogenesis was measured by tritiaded thymidine uptake and the cells were cultured with plasma from the same individual. The lymphoblastogenesis was indirectly estimated by the following equation: (formula; see text) where cpm I represents lymphoblastogenesis estimulated by PHA-M and cpm E represents lymphoblastic transformation with no antigen added to the culture medium. BTI was determined before and 30 days after the elimination of cow's milk from the diet. Lymphoblastogenesis, in the samples obtained before the elimination diet, was significantly increased (BTI decreased) in HCM group but not in the others (p less than 0.01). There was no difference in the lymphoblastogenesis behaviour of the three groups after 30 days of exclusion diet. The difference between the BTI values obtained before and after the elimination cow's milk from the diet would be helpful in the early diagnosis of cow's milk allergy.