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Counterimmunoelectrophoresis and latex particle agglutination in the etiologic diagnosis of presumed bacterial pneumonia in pediatric patients. 1988

F Rusconi, and L Rancilio, and B M Assael, and G Bonora, and M Cerri, and M C Pietrogrande, and S Razon, and L Serafini, and G Torti, and D Vaggi
Department of Pediatrics I, University of Milan, Italy.

A commercial latex agglutination (LA) kit (Wellcogen, Wellcome Diagnostics) used to detect bacterial polysaccharide antigens (Haemophilus influenzae type b and Streptococcus pneumoniae) was compared with a modified counterimmunoelectrophoresis technique and blood culture for etiologic diagnosis of presumptive bacterial pneumonia requiring hospitalization in 60 infants and children. Serum, urine and either sputum or nasopharyngeal secretions were collected during the first 5 days of therapy for antigen detection. Blood culture was positive in 6 of 52 (11.5%) of cases. Antigens were detected by counterimmunoelectrophoresis and/or LA in 13 of 60 (21.7%) serum samples, 2 of 16 (12.5%) unconcentrated urine samples, 19 of 42 (45.2%) urine samples concentrated 25-fold and 21 of 45 (46.7%) sputum or nasopharyngeal secretions. Antibiotic treatment for 5 days did not affect the antigen detection rate. Counter-immunoelectrophoresis was more sensitive than LA in serum and urine but not in sputum. However, because false positive reactions were frequently obtained with LA on nasopharyngeal secretions of an age-matched control group, this test appears unreliable.

UI MeSH Term Description Entries
D007122 Immunoelectrophoresis A technique that combines protein electrophoresis and double immunodiffusion. In this procedure proteins are first separated by gel electrophoresis (usually agarose), then made visible by immunodiffusion of specific antibodies. A distinct elliptical precipitin arc results for each protein detectable by the antisera.
D007223 Infant A child between 1 and 23 months of age. Infants
D007841 Latex Fixation Tests Passive agglutination tests in which antigen is adsorbed onto latex particles which then clump in the presence of antibody specific for the adsorbed antigen. (From Stedman, 26th ed) Latex Agglutination Tests,Agglutination Test, Latex,Agglutination Tests, Latex,Fixation Test, Latex,Fixation Tests, Latex,Latex Agglutination Test,Latex Fixation Test,Test, Latex Agglutination,Test, Latex Fixation,Tests, Latex Agglutination,Tests, Latex Fixation
D011014 Pneumonia Infection of the lung often accompanied by inflammation. Experimental Lung Inflammation,Lobar Pneumonia,Lung Inflammation,Pneumonia, Lobar,Pneumonitis,Pulmonary Inflammation,Experimental Lung Inflammations,Inflammation, Experimental Lung,Inflammation, Lung,Inflammation, Pulmonary,Inflammations, Lung,Inflammations, Pulmonary,Lobar Pneumonias,Lung Inflammation, Experimental,Lung Inflammations,Lung Inflammations, Experimental,Pneumonias,Pneumonias, Lobar,Pneumonitides,Pulmonary Inflammations
D002648 Child A person 6 to 12 years of age. An individual 2 to 5 years old is CHILD, PRESCHOOL. Children
D002675 Child, Preschool A child between the ages of 2 and 5. Children, Preschool,Preschool Child,Preschool Children
D003378 Counterimmunoelectrophoresis Immunoelectrophoresis in which immunoprecipitation occurs when antigen at the cathode is caused to migrate in an electric field through a suitable medium of diffusion against a stream of antibody migrating from the anode as a result of endosmotic flow. Electrosyneresis,Immunoelectroosmophoresis,Immunoelectrophoresis, Countercurrent,Immunoelectrophoresis, Crossover,Countercurrent Immunoelectrophoresis,Crossover Immunoelectrophoresis
D003937 Diagnosis, Differential Determination of which one of two or more diseases or conditions a patient is suffering from by systematically comparing and contrasting results of diagnostic measures. Diagnoses, Differential,Differential Diagnoses,Differential Diagnosis
D006192 Haemophilus Infections Infections with bacteria of the genus HAEMOPHILUS. Hemophilus Infections,Haemophilus influenzae Infection,Haemophilus influenzae Type b Infection,Hib Infection,Infections, Haemophilus,Infections, Hemophilus,Haemophilus Infection,Haemophilus influenzae Infections,Hemophilus Infection,Hib Infections,Infection, Haemophilus,Infection, Haemophilus influenzae,Infection, Hemophilus,Infection, Hib
D006193 Haemophilus influenzae A species of HAEMOPHILUS found on the mucous membranes of humans and a variety of animals. The species is further divided into biotypes I through VIII. Bacterium influenzae,Coccobacillus pfeifferi,Haemophilus meningitidis,Hemophilus influenzae,Influenza-bacillus,Mycobacterium influenzae

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