Frequency and specificity of red blood cells alloantibodies among Sudanese multiparous women

N. Abdelateif, Abather Mohamed
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Abstract

: Background: Allo-immunization is a condition in which the body gains immunity, from another individual of the same species, against its cells. Blood group antibodies are called alloantibodies if they react with alloantigens on the red blood cells (RBCs) of other individuals. Immune antibodies are produced following exposure to foreign erythrocyte antigens through pregnancy or transfusion. Maternal alloimmunization, also known as iso-immunization, occurs when a woman's immune system is sensitized to foreign erythrocyte surface antigens, stimulating the production of immunoglobulin G (IgG) antibodies. Purpose: This study aimed to detect the frequency and specificity of alloantibodies against (RBCs) antigens among Sudanese multiparous women. Methods: This cross-sectional study was conducted on randomly selected 130 pregnant ladies, most of them were attending Soba teaching hospital and the remaining to Khartoum teaching hospital during the period from February-2008 to May-2008. Serum from each lady was collected. Each sample was grouped and screened for alloantibodies, then samples with positive antibody screening were tested for antibody identification using the gel agglutination method. Results: The overall frequency of alloantibodies detected among studied pregnant ladies was 10.8%. The results also revealed that an insignificant correlation was found between age, ethnic group, and presence of alloantibodies (( P-value : > 0.05); While a significant correlation was observed between the history of abortion, and the number of pregnancies and presence of alloantibodies ( P-value : < 0.05). Conclusion: In summary, we concluded that the alloantibodies were detected in one-tenth of the studied subjects with a significant association between detected antibodies and the number of pregnancies .
苏丹产妇女红细胞同种异体抗体的频率和特异性
背景:同种异体免疫是机体从同一物种的另一个个体获得对自身细胞的免疫力的一种情况。如果血型抗体与其他个体的红细胞(红细胞)上的同种抗原发生反应,则称为同种抗体。免疫抗体是通过妊娠或输血暴露于外来红细胞抗原后产生的。母体同种免疫,也称为同种免疫,发生在女性免疫系统对外来红细胞表面抗原敏感,刺激免疫球蛋白G (IgG)抗体产生的时候。目的:本研究旨在检测苏丹产妇女抗(红细胞)抗原的同种异体抗体的频率和特异性。方法:采用横断面研究方法,随机选取2008年2月~ 2008年5月在苏巴教学医院就诊的孕妇130例,其余孕妇在喀土穆教学医院就诊。收集了每位女士的血清。将每个样本分组筛选同种异体抗体,抗体筛选阳性样本采用凝胶凝集法进行抗体鉴定。结果:所研究孕妇同种异体抗体检出率为10.8%。结果还显示,年龄、种族和同种异体抗体的存在不显著相关(p值> 0.05);而流产史、妊娠次数和同种异体抗体存在显著相关(p值< 0.05)。结论:综上所述,我们得出的结论是,在十分之一的研究对象中检测到同种异体抗体,并且检测到的抗体与怀孕次数之间存在显著相关性。
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