This study determined the research value of Igs in apparently healthy 261 rural Bangladeshi primary school children (aged 5 to14 years, imply 9.3 years). of the defense mechanism is definitely immunoglobulins (Ig), which are the effector products of differentiated B-cells and mediate the humoral arm of the immune response. Three main components of the Igs (G, M and A) are measured for many medical conditions particularly in children. Interpretation of the results depends on the known research ideals, and these ideals vary among populations. Consequently, it is necessary to determine the research value in the population under query. In Bangladesh, no statement is available on normal level of Igs in children. This study was carried out to find out the normal level of IgG, IgM and IgA in healthy school children of Bangladesh. == MATERIALS AND METHODS == Main education in Bangladesh consists of five years from marks CHMFL-ABL-039 I through V and is free of cost. Usually children enroll in to primary universities at 5 to 6 years of age, but there is no strict rule. This study was done, during February through May 1992, in Sanora Authorities Primary School located in Sanora town of Dhamrai upazilla (sub-district) in Dhaka area. Children of all socioeconomic status from your nearby area attend this school. It is run by a management committee, which consists of associates of parents, teachers and government officers. A meeting was held between the investigators and management committee, which also included the local health expert. Consent was CHMFL-ABL-039 from the management committee. Then class teachers explained the purpose of the study to the college students and requested them to participate in the study. A total of 450 boys and girls of all marks participated in the study. We excluded those who suffered from fever and sore throat during the last four weeks, and those who had medical evidence of tonsillo-pharyngitis on physical exam. None of them suffered from immunodeficiency diseases. Therefore, 361 (80.2%) children were selected for laboratory investigation. Among them 261 (72.2%) subjects were finally selected for this study after excluding those with C-reactive protein more than 0.05 mg/dl1)and yielded bacteria on throat culture (mostly streptococci and staphylococci). Blood samples were collected in fasting condition and sera were separated within two hours of venepuncture and maintained in -80C until measurement of total protein, albumin, C-reactive protein, IgG, IgM and IgA. Multipurpose Immunochemistry System Autoanalyzer Model LA-2000 (Eiken Chemical Organization, Japan) using latex reagent was used to measure Igs. All reagents used in this study were from your same organization. == Statistical analysis: == All statistical analyses were done by using SAS statistical package (Launch 6.11, SAS Institute Inc., Cary, NC). The CHMFL-ABL-039 research value for Igs were defined as the ranges that included 95% of ideals from the percentile distributions. Results are offered according to age groups RTS because there are some reports from developed countries2)that Ig levels in children are related to age. == RESULTS == Subjects are 5 to 14 years (mean 9.3 years) old, and boys and girls are related in age. Age-specific levels of proteins are offered inTable 1. Percentile distributions with mean (standard deviation) relating to age groups are offered inTable 2. There is no age related tendency of immunoglobulin levels. The 95% research value calculation in all subjects showed that the range for IgG was 1103 to 2524, IgM was 92 to 390, and IgA was 72 to 325 mg/dl. == Table 1. Mean (standard deviation) of protein CHMFL-ABL-039 levels by age. == == Table 2. Mean (standard deviation) and percentile distribution of immunoglobulins (mg/dl). == == Conversation == Estimation of Ig is now an established tool for the study of immune status or the immunologic response of an individual inside a high-risk condition. The research value of Igs should, consequently, be established by using data from a representative local healthy population. To the.