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CASE REPORT
Year : 2012  |  Volume : 1  |  Issue : 3  |  Page : 141-143

Para-Bombay phenotype: report of a rare blood group


1 Department of Immunohaematology and Blood Transfusion, Sri Venkateswara Institute of Medical Sciences, Tirupati, India
2 Department of Medicine, Sri Venkateswara Institute of Medical Sciences, Tirupati, India

Correspondence Address:
K V Sreedhar Babu
Associate Professor, Department of Immunohaematology and Blood Transfusion, S. V. Institute of Medical Sciences, Tirupati
India
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Source of Support: None, Conflict of Interest: None


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The blood sample of a 54-year-old male patient who presented with signs and symptoms suggestive of anaemia was submitted to the Blood Bank for blood grouping and cross-matching. In forward grouping, no agglutination was observed with A, B and AB antisera, but agglutination was noticed with D antiserum (Group O). In reverse grouping, there was agglutination in tube labelled A and no agglutination in tubes B and O (Group B) resulting in discrepancy between forward and reverse grouping. Further testing confirmed that the individual’s blood group was Para-Bombay B (Para-BH), which is a rare entity. The Para-Bombay phenotype is very rare. Only a few cases of Para-Bombay were reported in India till now and none from Andhra Pradesh. This entity is characterized by the absence of H, A and B antigens on the red cells but their presence in saliva and secretions of gastrointestinal and genitourinary tracts. Proper identification of this phenotype is very important; otherwise this particular blood group may be mislabelled as group O.


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