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Just looking at ABO/Rh antibodies, you are looking at anti-A present in a B pos person.
As Blood type O contains Anti-A-Antibodies and Anti-B-Antibodies (not Antigens) Anti-A-Serum contains Anti-A-Antibodies (which reacts with A antigen not antibody) Anti-B-Serum contains Anti-B-Antibodies (which reacts with B antigen not antibody) so antibody in antiserum will not find any antigen in blood-group O to react with so no Clumping
You give the antitetanus serum because it contains passive antibodies that can immediately start attacking any antigens if present. While that is going on, the body reacts to the toxoids injected into it by producing its own antibodies, this process is slow thus we need the antitetanus serum for immediate protection.
Blood types A and AB will clump with the addition of anti-A serum. The serum reacts with the A antigen present in these blood types to produced clumping.
A person with both A and B antigens is designated as having AB bllod group
Anti-B
No, AB positive patients have neither anti-A nor anti-B antibodies. Thus, AB positive is known as the universal receiver of all blood types :).
Anti-tetanus serum is also known as tetanus immune globlulin. In the US, commercial brands available include HyperTet and BayTet. Blood from people who have been immunized with tetanus vaccine is processed to get the tetanus antibodies, which is injected to prevent tetanus in an un-immunized person.
If neither anti-A nor anti-B sera clot with donor blood, the blood type is O. The blood does not have the antigens that will close clotting with the antibodies in the serum.
Tetanus is caused by a toxin released by a bacterial organism. The serum contains antibodies to the toxin produced by the bacterium Clostridium tetani. The antibodies inactivate the toxin in the blood stream and prevent an individual from experiencing tetanus.
Antisera is blood serum containing antibodies against a specific antigen, used to treat or provide immunity to a disease. It is extracted from an animal that has immunity to a particular disease. Serum is the fluid obtained when whole blood is separated into its solid and liquid components after it has been allowed to clot. It is clear and yellow in color.
Since that person has anti-B antibodies, then A antigens are present in her red blood cells. Since that person doesnt have anti-A antibodies, then there are no B antigens present, which means the person has A type blood.