How Blood group is classified - Explain ? and which one is the rare blood group ?

Answer 1

A rare Blood type is any Blood type that is difficult to find. A Blood type is classified as rare when more than 200 donors have to be screened to find one compatible donor with Blood of that type. In the "ABO" system, all Blood belongs to one of four major group: A, B, AB, or O. But there are more than two hundred minor Blood groups that can complicate Blood transfusions. These are known as Rare Blood Types. About one person in 1,000 will inherit a rare Blood type. Normally expressed in a letter or two, with maybe a plus or a minus, these few persons read their Blood type in an extensive series of letters in addition to their 'ABO' type designation.

Answer 2

There are protein matters on the RBCs which are called agglutinogens which determines the blood group. There are various ways of blood grouping eg ABO grouping (A,B.AB and O grouping), Rh-typing( whether +ve or -ve), Duffy typing etc...The most commonly used are ABO grouping and Rh typing. If A aglutinogen is present then the blood is of A group like wise the B group and AB group. In O, no aglutinogens are available.
Another opposite protein known as aglutinin also is found circulating in the serum thus Aglutinin A causes clumping of RBCs having Aglutinogen A and latter causes it to break down ( haemolysis). When the blood group is A the corresponding aglutinin A will not be found in the blood of that particular man. Like wise a person with O group will have no aglutinogen but will have both the A and B aglutinins. By using Aglutinin preparations we can identify the blood group by testing the clumping of RBCs.

Your blood group is inherited from your parents and production of the aglutinogen or aglutinin is determined by the genes.

Rh- typing is particularly important for pregnant women. I the husband is Rh +ve and the wife is Rh-ve then the 2nd child may suffer from hydrops foetalis and baby will be born death.

Duffy blood grouping has relevence with some type of malaria infection.

The least common blood group is AB -ve.
O positive - 40 per cent
O negative - 9 per cent
A positive - 31 per cent
A negative - 7 per cent
B positive - 8 per cent
B negative - 2 per cent
AB positive - 2 per cent
AB negative - 1 per cent

Answer 3

I think AB negative is one of the most rare blood types. I had a relative with that type, and the blood bank was always calling him to give blood. Type O and A positive are more common--they used to say Type 0 was a universal donor blood type.

Answer 4

A blood type (also called a blood group) is a classification of blood based on the presence or absence of inherited antigenic substances on the surface of red blood cells (RBCs). These antigens may be proteins, carbohydrates, glycoproteins or glycolipids, depending on the blood group system, and some of these antigens are also present on the surface of other types of cells of various tissues. Several of these red blood cell surface antigens, that stem from one allele (or very closely linked genes), collectively form a blood group system.

The two most significant blood group systems were discovered during early experiments with blood transfusion: the ABO group in 1901[4] and the Rhesus group in 1937.[Development of the Coombs test in 1945, the advent of transfusion medicine, and the understanding of hemolytic disease of the newborn led to discovery of more blood groups. Today, a total of 29 human blood group systems are recognized by the International Society of Blood Transfusion A complete blood type would describe a full set of 29 substances on the surface of RBCs, and an individual's blood type is one of the many possible combinations of blood group antigens. Across the 29 blood groups, over 600 different blood group antigens have been found,[8] but many of these are very rare or are mainly found in certain ethnic groups. Almost always, an individual has the same blood group for life; but very rarely, an individual's blood type changes through addition or suppression of an antigen in infection, malignancy or autoimmune disease.Blood types have been used in forensic science and in paternity testing, but both of these uses are being replaced by DNA analysis, which provides greater certitude.

The rare blood type is AB negative

TYPES-----DISTRIBUTION-----RATIOS

O +..........1 person in 3..............38.4%
O -...........1 person in 15..............7.7%
A +..........1 person in 3...............32.3%
A -...........1 person in16................6.5%
B +..........1 person in12................. 9.4%
B -...........1 person in 67.................1.7%
AB +........1 person in 29..................3.2%
AB -.........1 person in 167................0.7%

Answer 5

That is your RH type. Since you're mom is Rh negative they always test the baby. If you were Rh positive, and you and your mom's blood mixed while she was pregnant, she could form antibodies to the Rh factor. (also called the D antigen) This wouldn't usually effect the first baby, but if she had more kids that were Rh +, now that she has antibodies built up, they would attack the baby's blood and it could be born with severe anemia or even die. Mom's with Rh negative blood are given a shot of synthetic anti-D (called rhogam) that prevents them from learning how to make antibodies against it.

Answer 6

First of all we have:
1.Blood plasma
2.Blood cells.

The blood cells have leucocytes,erythrocytes and thrombocytes.

Now blood groups were invented by a scientist called Carl Landsteiner till then many of the persons died as the antigens and the antibodies differed from each other.

There are four groups:-
1.A+/A-
2.B+/B-
3.AB+/AB-
4.O+/O-

The signs which you see are based on Rh-factor.(Rheuses factor).

The person which has the presence of rh-factor is +ve and the one which doesnt has Rh-factor is -ve.

If the antigen on erythrocytes of the donor's blood and the antibody on the reciepents plasma are same then clotting is caused which blocks the circulation of the blood.

Answer 7

Principal blood groups are FOUR. They are A Rare blood group is o+
Classification is based on presence or absence of inherited antigenic substanceson surface of RBCs

Answer 8

blood groups are clsassified as A B AB and O.the rarest group is O negative.

Answer 9

Type Z is the rarest. Blood is classified as a gooey red substance that flows from various places in our bodies... especially when a scab has just been picked.

Answer 10

hi
each red blood cell carry one or two or non protien on it
if it carry one protien (A) we call it group a
if it carry one protien (B) we call it group b
if it carry two protien (A) and (B) we call it group ab
if it carry none protien we call it group o
and you must know that every red bloob cell may have or may not have a protien that wecall it (rizesi protien)
if it have it we call it posative
and if not we call it negative
--the rare is (o negative)
its realy not rare but you must know that we cant give him any another blood group
sorry for lingth
and hope you a nice day