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Bombay Blood Group .pdf

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A Rare Blood Group or Bombay Blood Group
What is Bombay Blood Group??
Bombay blood group is a rare blood type that was first discovered in a patient of Bombay
(Mumbai), India in the year 1952. It is a rare condition and has been reported in 1 of 10,000
individuals in India and 1 in a million people in Europe. Hence its named as “Bombay Blood
Donating blood to the needy is a noble act of saving lives. Most of us are ready to do so. But the
doctor first ensures the type of blood we carry, since our blood comes in various physiological
types or groups. The general blood types of are A, B, AB and O. Matching of the blood types of
the donor and the recipient is vital, else it could lead to serious life-threatening complications.
It is in this connection, In Bombay (Mumbai), India, an individual was discovered to have an
interesting blood type that reacted to other blood types in a way that had not been seen before.
The youngster has a very rare blood type. His blood is not O, A, B, or AB, but a special type
called (hh)- a rare one first discovered in Bombay in 1952, and named after its discovered in
History of Bombay Blood Group:
It was in 1952 that Doctors Y.M. Bhende, C.K. Deshpande and H.M. Bhatia of the Seth
Gordhandas Sunderdas Medical College, Mumbai published a note in The Lancet (May 3, 1952)
about two patients (X, a railway worker and Y, a stab wound victim) who needed blood
transfusion. None of the blood types known until then worked for them. The moment their blood
samples were mixed with any of the known types, the blood coagulated or clumped up. The
doctor tried the blood of over 160 donors and found at last that one from Mr. Z, a resident of
Bombay, suited the type of both patients X and Y. This donor blood type was then named by Dr.
Bhende and others as the ‘Bombay Blood Type also called as hh group’.
Why it is called hh group??
It is also called the HH group. The peculiarity is that they do not express the H antigen, the
antigen which is present in blood group O. The H antigen is the precursor of A and B blood
group antigens. As a result they cannot form A antigens or B antigens on their red blood cells.
Thus they can donate blood to anybody with ABO grouping but can receive blood only from
Bombay blood group people.
Bombay Blood Group Statistics
Bombay phenotype was first reported by in 1952. Bombay phenotype is rare, since it occurs in
about 1 in 10,000 individuals in India and 1/100,000 individuals in Europe.
Regarding the distribution and spread of the Bombay phenotype in different states of India, it is
apparent that the phenotype is more common in the states of Western and Southern parts of India

as compared to other states. Of the 179 cases recorded by Sathe et al in the year 1988, most cases
belonged to the state of Maharashtra. A slightly higher frequency of the Bombay phenotype was
also found in the neighboring state of Karnataka (15 cases), Andhra Pradesh (8 cases), Goa (6
cases), Gujarat (5 cases), Uttar Pradesh (5 cases), and so on in the decreasing order.
Distribution of Bombay Blood group cases Reported from different states of India

No. of Bombay Blood
Group Cases Reported

Andhra Pradesh














Madhya Pradesh


Uttar Pradesh


Tamil Nadu






South India






Not Known




What if I have Bombay Blood Group?
A person with this rare group should always be cautious and alert. People with this blood group
can donate blood to any ABO group, but as this blood group is rare one shouldn’t be advised to
donate to any other groups. And they should maintain healthy body to avoid Health problems.
Where can I get Bombay Blood grouping done?
This can be done in most of the good reputed blood banks and laboratories on request.
What to do if you need Bombay Blood Group?
We can definitely start a search for Bombay blood group by following these steps.

Get all the family members and relatives of the patients tested for the blood group. It’s
very likely that one or the other relative has this group.
Put up a request for the requirement in the leading newspapers. Please don’t circulate
message and mails as it will only contribute to spam folder.
Be open to get blood from other cities.
The most effective way is visiting all blood banks of the city as well as neighboring big
cities. Usually blood banks have a huge list of donors who had donated in the blood bank
till date.
Out of this huge list 1 or 2 may be Bombay blood group.
Any if nothing works, Here is a list of Bombay Blood group Helpline Numbers
+91-9480044444 & 080-67335555 & or log on www.bombaybloodgroup.org and post a
request. You can also log on www.bloodforsure.com to get any type of Blood during

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