Biomaterial Database

Direct Coombs antiglobulin reactions in Gambian children with Plasmodium falciparum malaria. II. Specificity of erythrocyte-bound IgG. 1980

C A Facer

The cause of direct Coombs (DAT) positivity in West African (Gambian) children has been investigated. Results obtained from a comparison of two groups of primary school children, one from an area hyperendemic for P. falciparum malaria and the other partially protected from malaria, indicate an association between a high incidence of DAT positivity and P. falciparum parasitaemia with raised serum antibody titres to falciparum schizonts. Erythrocytes taken from children with a high IgG DAT titre were subjected to acid elution and the eluates examined for IgG content and antigen specificity. Eluted IgG had specific antibody activity against P. falciparum schizont antigen as demonstrated by means of the indirect fluorescent antibody technique. Cross-reaction was not observed with either P. falciparum gametocytes or P. malariae schizonts. No blood group specificity could be demonstrated in either the red cell eluates or serum taken from children with DAT positive red cells. The results provide convincing evidence which implicates falciparum malaria in the aetiology of Coombs positivity in Gambian children. It is probable that erythrocyte sensitization results from passive attachment of circulating complement-fixing malaria antigen-antibody complexes.

UI	MeSH Term	Description	Entries
D007074	Immunoglobulin G	The major immunoglobulin isotype class in normal human serum. There are several isotype subclasses of IgG, for example, IgG1, IgG2A, and IgG2B.	Gamma Globulin, 7S,IgG,IgG Antibody,Allerglobuline,IgG(T),IgG1,IgG2,IgG2A,IgG2B,IgG3,IgG4,Immunoglobulin GT,Polyglobin,7S Gamma Globulin,Antibody, IgG,GT, Immunoglobulin
D007223	Infant	A child between 1 and 23 months of age.	Infants
D008288	Malaria	A protozoan disease caused in humans by four species of the PLASMODIUM genus: PLASMODIUM FALCIPARUM; PLASMODIUM VIVAX; PLASMODIUM OVALE; and PLASMODIUM MALARIAE; and transmitted by the bite of an infected female mosquito of the genus ANOPHELES. Malaria is endemic in parts of Asia, Africa, Central and South America, Oceania, and certain Caribbean islands. It is characterized by extreme exhaustion associated with paroxysms of high FEVER; SWEATING; shaking CHILLS; and ANEMIA. Malaria in ANIMALS is caused by other species of plasmodia.	Marsh Fever,Plasmodium Infections,Remittent Fever,Infections, Plasmodium,Paludism,Fever, Marsh,Fever, Remittent,Infection, Plasmodium,Plasmodium Infection
D010963	Plasmodium falciparum	A species of protozoa that is the causal agent of falciparum malaria (MALARIA, FALCIPARUM). It is most prevalent in the tropics and subtropics.	Plasmodium falciparums,falciparums, Plasmodium
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
D003080	Cold Temperature	An absence of warmth or heat or a temperature notably below an accustomed norm.	Cold,Cold Temperatures,Temperature, Cold,Temperatures, Cold
D003298	Coombs Test	A test to detect non-agglutinating ANTIBODIES against ERYTHROCYTES by use of anti-antibodies (the Coombs' reagent.) The direct test is applied to freshly drawn blood to detect antibody bound to circulating red cells. The indirect test is applied to serum to detect the presence of antibodies that can bind to red blood cells.	Anti-Human Globulin Consumption Test,Antiglobulin Consumption Test,Antiglobulin Test,Coombs' Test,Antihuman Globulin Consumption Test,Direct Antiglobulin Test,Direct Coombs Test,Indirect Antiglobulin Test,Indirect Coombs Test,Anti Human Globulin Consumption Test,Antiglobulin Consumption Tests,Antiglobulin Test, Direct,Antiglobulin Test, Indirect,Antiglobulin Tests,Antiglobulin Tests, Direct,Antiglobulin Tests, Indirect,Consumption Test, Antiglobulin,Consumption Tests, Antiglobulin,Coomb Test,Coomb's Test,Coombs Test, Direct,Coombs Test, Indirect,Direct Antiglobulin Tests,Indirect Antiglobulin Tests,Test, Antiglobulin,Test, Antiglobulin Consumption,Test, Coombs,Test, Coombs',Test, Direct Antiglobulin,Test, Direct Coombs,Test, Indirect Antiglobulin,Test, Indirect Coombs,Tests, Antiglobulin,Tests, Antiglobulin Consumption,Tests, Direct Antiglobulin,Tests, Indirect Antiglobulin
D004912	Erythrocytes	Red blood cells. Mature erythrocytes are non-nucleated, biconcave disks containing HEMOGLOBIN whose function is to transport OXYGEN.	Blood Cells, Red,Blood Corpuscles, Red,Red Blood Cells,Red Blood Corpuscles,Blood Cell, Red,Blood Corpuscle, Red,Erythrocyte,Red Blood Cell,Red Blood Corpuscle
D005455	Fluorescent Antibody Technique	Test for tissue antigen using either a direct method, by conjugation of antibody with fluorescent dye (FLUORESCENT ANTIBODY TECHNIQUE, DIRECT) or an indirect method, by formation of antigen-antibody complex which is then labeled with fluorescein-conjugated anti-immunoglobulin antibody (FLUORESCENT ANTIBODY TECHNIQUE, INDIRECT). The tissue is then examined by fluorescence microscopy.	Antinuclear Antibody Test, Fluorescent,Coon's Technique,Fluorescent Antinuclear Antibody Test,Fluorescent Protein Tracing,Immunofluorescence Technique,Coon's Technic,Fluorescent Antibody Technic,Immunofluorescence,Immunofluorescence Technic,Antibody Technic, Fluorescent,Antibody Technics, Fluorescent,Antibody Technique, Fluorescent,Antibody Techniques, Fluorescent,Coon Technic,Coon Technique,Coons Technic,Coons Technique,Fluorescent Antibody Technics,Fluorescent Antibody Techniques,Fluorescent Protein Tracings,Immunofluorescence Technics,Immunofluorescence Techniques,Protein Tracing, Fluorescent,Protein Tracings, Fluorescent,Technic, Coon's,Technic, Fluorescent Antibody,Technic, Immunofluorescence,Technics, Fluorescent Antibody,Technics, Immunofluorescence,Technique, Coon's,Technique, Fluorescent Antibody,Technique, Immunofluorescence,Techniques, Fluorescent Antibody,Techniques, Immunofluorescence,Tracing, Fluorescent Protein,Tracings, Fluorescent Protein