Antibody response of Mexican infants to Haemophilus influenzae type b capsular polyribosylribitol phosphate. Differences between natural and vaccine induced (oligosaccharide-CRM197 conjugated vaccine) immunization. 1996

F Massó, and A Paéz, and A Arista, and L Salmón, and L Montaño
Departamento de Biología Celular, Instituto Nacional de Cardiología Ignacio Chávez, México, D.F.

In this study we compared natural vs. induced Haemophilus influenzae type b (Hib) anti-capsular polyribosylribitol phosphate (PRP) antibody response in a low socioeconomic population. One hundred twenty five 2-month-old children received the complete HbOC vaccine immunization scheme and a booster dose at 15 months of age. One hundred twenty five non-immunized children served as the control group. Serum Hib anti-PRP antibody titers were determined by ELISA in all children. We found at the end of the primary immunization scheme an antibody concentration of 27.28 micrograms/ml in the immunized group vs. 7.48 micrograms/ml in the control group. The antibody response was mainly of the IgG1 class in both groups. After the booster dose the antibody concentration was 30.14 g/ml in the vaccinated group vs. 6.06 micrograms/ml in the control group (p < 0.01). Ninety nine percent of immunized and non-immunized infants had titers greater than 1 microgram/ml. These results confirm that immunization with the HbOC vaccine induces an important increase in anti-PRP specific antibody titer, but they also demonstrate that natural exposure induces responses higher than those referred as protective (1 microgram/ml).

UI MeSH Term Description Entries
D007132 Immunoglobulin Isotypes The classes of immunoglobulins found in any species of animal. In man there are nine classes that migrate in five different groups in electrophoresis; they each consist of two light and two heavy protein chains, and each group has distinguishing structural and functional properties. Antibody Class,Ig Isotype,Ig Isotypes,Immunoglobulin Class,Immunoglobulin Isotype,Antibody Classes,Immunoglobulin Classes,Class, Antibody,Class, Immunoglobulin,Classes, Antibody,Classes, Immunoglobulin,Isotype, Ig,Isotype, Immunoglobulin,Isotypes, Ig,Isotypes, Immunoglobulin
D008297 Male Males
D008800 Mexico A country in NORTH AMERICA, bordering the Caribbean Sea and the Gulf of Mexico, between BELIZE and the UNITED STATES, and bordering the North Pacific Ocean, between Guatemala and the UNITED STATES.
D011135 Polysaccharides, Bacterial Polysaccharides found in bacteria and in capsules thereof. Bacterial Polysaccharides
D011795 Surveys and Questionnaires Collections of data obtained from voluntary subjects. The information usually takes the form of answers to questions, or suggestions. Community Survey,Nonrespondent,Questionnaire,Questionnaires,Respondent,Survey,Survey Method,Survey Methods,Surveys,Baseline Survey,Community Surveys,Methodology, Survey,Nonrespondents,Questionnaire Design,Randomized Response Technique,Repeated Rounds of Survey,Respondents,Survey Methodology,Baseline Surveys,Design, Questionnaire,Designs, Questionnaire,Methods, Survey,Questionnaire Designs,Questionnaires and Surveys,Randomized Response Techniques,Response Technique, Randomized,Response Techniques, Randomized,Survey, Baseline,Survey, Community,Surveys, Baseline,Surveys, Community,Techniques, Randomized Response
D002675 Child, Preschool A child between the ages of 2 and 5. Children, Preschool,Preschool Child,Preschool Children
D002986 Clinical Trials as Topic Works about pre-planned studies of the safety, efficacy, or optimum dosage schedule (if appropriate) of one or more diagnostic, therapeutic, or prophylactic drugs, devices, or techniques selected according to predetermined criteria of eligibility and observed for predefined evidence of favorable and unfavorable effects. This concept includes clinical trials conducted both in the U.S. and in other countries. Clinical Trial as Topic
D004797 Enzyme-Linked Immunosorbent Assay An immunoassay utilizing an antibody labeled with an enzyme marker such as horseradish peroxidase. While either the enzyme or the antibody is bound to an immunosorbent substrate, they both retain their biologic activity; the change in enzyme activity as a result of the enzyme-antibody-antigen reaction is proportional to the concentration of the antigen and can be measured spectrophotometrically or with the naked eye. Many variations of the method have been developed. ELISA,Assay, Enzyme-Linked Immunosorbent,Assays, Enzyme-Linked Immunosorbent,Enzyme Linked Immunosorbent Assay,Enzyme-Linked Immunosorbent Assays,Immunosorbent Assay, Enzyme-Linked,Immunosorbent Assays, Enzyme-Linked
D004890 Erythema Redness of the skin produced by congestion of the capillaries. This condition may result from a variety of disease processes. Erythemas
D005260 Female Females

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