abstract objective the history of the studies on blood groups dates back to early 20th century. more than 600 antigenic structures were detected among 29 blood groups. however, abo and rh antigenic structures were taken into consideration in transfusion medicine. frequency of the blood groups in a community helps the individuals in need and blood bank employees, which could be related to some d...

Aim. To explore whether first-trimester levels of pregnancy-associated plasma protein-A (PAPPA) and serum free ß-human chorionic gonadotrophin (free ß-hCG) vary with maternal blood group and rhesus status and to determine their implications for Down syndrome. Methods. Blood samples were collected from all 539 singleton pregnancies undergoing first-trimester screening. Values of maternal serum P...

the evolution of human blood groups, without doubt, has a history as old as man himself. there are at least three hypotheses about the emergence and mutation of human blood groups. global distribution pattern of blood groups depends on various environmental factors, such as disease, climate, altitude, humidity etc. in this survey, the collection of main blood groups abo and rh, along with some ...

Determinations were carried out of the ABO blood groups and Rhesus phenotypes of a series of 142 children with Perthes' disease. Where possible their parents and sibs were also grouped. Sera from the mothers of affected children were examined for the presence of Rhesus antibodies. No apparent association was demonstrated between Perthes' disease and any ABO phenotype. The disease is also appare...

The frequencies of ABO and rhesus blood groups vary from one population to another. We studied blood group distribution in 120 Nepalese students; 34% were blood group A, 29% group B, 4% group AB and 32.5% group O. The frequency of Rh-negative blood was 3.33% and Rh-positive 96.66%.

Objective: To determine the percentage of ABO and Rhesus blood groups among population of the city of Mashhad. Design: The blood groups of studied population was performed using routine method of blood grouping. Subjects: Eight hundred sixty-seven subjects aged 8 Year and above including 436 male and 431 female. The subjects were randomly selected from 20 different areas of the city of Mashhad....

The distributions of ABO, rhesus, and Lewis blood group antigens were studied in patients with alcoholic cirrhosis, alcoholic pancreatitis, chronic active hepatitis, and primary biliary cirrhosis. There were no differences in frequencies of ABO and rhesus blood group antigens between the groups or in comparison with a control group of blood donors. Lewis phenotype Le (a- b-), however, was more ...

S Background: Periodontal disease is one of the two major dental diseases that affect human populations worldwide at high prevalence rates. Although it is primarily caused by bacterial plaque, its incidence and severity is modified by an individual’s inflammatory response, systemic health, and various local factors that predispose to plaque accumulation. The correlation between some systemic di...