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Prevalence and titre of ABO haemolysin antibodies in pregnant Nigerian women. 1990

E A Usanga, and J O Akwiwu
Department of Haematology & Blood Transfusion, College of Medical Sciences, University of Calabar, Nigeria.

The prevalence and titre of anti-A and anti-B haemolysin antibodies was determined in pregnant and non-pregnant women in a Nigerian community. The results show that alpha haemolysin occurs less frequently than beta-haemolysin in both pregnant and non-pregnant subjects. However, the prevalence of alpha haemolysin was significantly higher in pregnant subjects than in the non-pregnant ones. Surprisingly, the prevalence of haemolysin was significantly lower among the pregnant group than the non-pregnant group. These findings seem to suggest that the foetus probably plays a dual role in alpha and beta-haemolysin production--it enhances the production of alpha-haemolysin while suppressing that of beta-haemolysin. These findings offer explanations for the usually observed low frequency of occurrence of haemolytic disease of the newborn due to ABO incompatibility.

UI MeSH Term Description Entries
D007231 Infant, Newborn An infant during the first 28 days after birth. Neonate,Newborns,Infants, Newborn,Neonates,Newborn,Newborn Infant,Newborn Infants
D009549 Nigeria A republic in western Africa, south of NIGER between BENIN and CAMEROON. Its capital is Abuja. Federal Republic of Nigeria
D011247 Pregnancy The status during which female mammals carry their developing young (EMBRYOS or FETUSES) in utero before birth, beginning from FERTILIZATION to BIRTH. Gestation,Pregnancies
D011248 Pregnancy Complications Conditions or pathological processes associated with pregnancy. They can occur during or after pregnancy, and range from minor discomforts to serious diseases that require medical interventions. They include diseases in pregnant females, and pregnancies in females with diseases. Adverse Birth Outcomes,Complications, Pregnancy,Adverse Birth Outcome,Birth Outcome, Adverse,Complication, Pregnancy,Outcome, Adverse Birth,Pregnancy Complication
D011446 Prospective Studies Observation of a population for a sufficient number of persons over a sufficient number of years to generate incidence or mortality rates subsequent to the selection of the study group. Prospective Study,Studies, Prospective,Study, Prospective
D001787 Blood Group Incompatibility An antigenic mismatch between donor and recipient blood. Antibodies present in the recipient's serum may be directed against antigens in the donor product. Such a mismatch may result in a transfusion reaction in which, for example, donor blood is hemolyzed. (From Saunders Dictionary & Encyclopedia of Laboratory Medicine and Technology, 1984). ABO Compatibility,ABO Incompatibility,Blood Group ABO Incompatibility,Blood Type Incompatibility,Rh Compatibility,Rh Incompatibility,ABO Compatibilities,ABO Incompatibilities,Blood Group Incompatibilities,Blood Type Incompatibilities,Compatibility, ABO,Compatibility, Rh,Incompatibilities, Blood Group,Incompatibility, ABO,Incompatibility, Blood Group,Incompatibility, Blood Type,Incompatibility, Rh,Rh Compatibilities,Rh Incompatibilities
D004899 Erythroblastosis, Fetal A condition characterized by the abnormal presence of ERYTHROBLASTS in the circulation of the FETUS or NEWBORNS. It is a disorder due to BLOOD GROUP INCOMPATIBILITY, such as the maternal alloimmunization by fetal antigen RH FACTORS leading to HEMOLYSIS of ERYTHROCYTES, hemolytic anemia (ANEMIA, HEMOLYTIC), general edema (HYDROPS FETALIS), and SEVERE JAUNDICE IN NEWBORN. Hemolytic Disease of Newborn,Erythroblastosis Fetalis,Erythroblastoses, Fetal,Erythroblastosis Fetali,Fetal Erythroblastoses,Fetal Erythroblastosis,Fetali, Erythroblastosis,Fetalis, Erythroblastosis,Newborn Hemolytic Disease,Newborn Hemolytic Diseases
D005260 Female Females
D006460 Hemolysin Proteins Proteins from BACTERIA and FUNGI that are soluble enough to be secreted to target ERYTHROCYTES and insert into the membrane to form beta-barrel pores. Biosynthesis may be regulated by HEMOLYSIN FACTORS. Hemolysin,Hemolysins,Hemalysins,Proteins, Hemolysin
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man

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