Birth control necessary to limit family size in tribal couples with aberrant heterosis of G-6-PD deficiency and sickle cell disorders in India: an urgency of creating awareness and imparting genetic counseling.
OBJECTIVE
(i) To study the outcome of ignorance and lack of awareness about sickle cell disease and G-6-PD deficiency among Dhelki Kharia tribal families of Orissa, and (ii) to study the reproductive output in relation to clinical genetics and patho-physiological implications.


METHODS
A random genetic study of screening for hemoglobinopathies and G-6-PD deficiency among Dhelki Kharia tribal community in Sundargarh district of Orissa was carried out for intervention during the year 2000-2004. A total of 81 Dhelki Kharia families were screened and six families with double heterozygosity for above genetic anomalies were encountered. About 2-3 ml. intravenous blood samples were collected in EDTA by disposable syringes and needles after taking informed consent from each individual in the presence of a doctor and community leaders and sent to laboratory at Bhubaneswar for hematological investigations. Analysis was carried out following the standard procedures after cross checking for quality control.


RESULTS
There were 12 (about 52%) children out of 23 who were either suffering from sickle cell trait or disease in concurrence with G-6-PD deficiency in hemizygous/heterozygous/homozygous condition in Dhelki Kharia tribal community of Orissa. There were on an average 3.83 number of surviving (range 2-6) children per mother in families of G-6-PD deficiency and sickle cell disorders. The average number of children (3.83) born (range 2-6 children) per mother to carrier/affected mother was much higher than the average for India (2.73).


CONCLUSIONS
It is very difficult to maintain the normal health of an affected child with aberrant anomalies due to exorbitant cost of treatment, frequent transfusions and huge involvement of economy. One of the implications of aberrant heterosis is its adverse affects on routine individual physiology and hard activities. It is suggested to limit the family size in carrier couples to avoid aberrant heterosis of hereditary hemolytic disorders in their offsprings.
Department of Biochemistry, Regional Medical Research Centre for Tribals (ICMR), Near Medical College, P.O.Garha, Nagpur Road, Jabalpur-482 003, Madhya Pradesh.
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Balgir
D000293:Adolescent; D000328:Adult; D000368:Aged; D000755:Anemia, Sickle Cell / Q000208:ethnology* / Q000235:genetics / Q000517:prevention & control; D002648:Child; D002675:Child, Preschool; D003267:Contraception; D005006:Ethnicity / Q000235:genetics; D005191:Family Characteristics; D005260:Female; D005817:Genetic Counseling; D005820:Genetic Testing / Q000379:methods; D005955:Glucosephosphate Dehydrogenase Deficiency / Q000097:blood / Q000208:ethnology*; D007722:Health Knowledge, Attitudes, Practice; D006579:Heterozygote; D006801:Humans; D006823:Hybrid Vigor / Q000235:genetics; D007194:India / Q000453:epidemiology; D007223:Infant; D008297:Male; D008875:Middle Aged; D012111:Residence Characteristics; D012424:Rural Population; D055815:Young Adult