An accident victim receives a blood transfusion. Shortly thereafter, he begins to have difficulty breathing, develops a fever, and experiences nausea and vomiting. Which of the following is the most likely interpretation of these events?

a. the blood transfusion contained pyrogens. b. the blood transfusion was mismatched, and the recipient had previously been exposed to the blood group antigens of the blood transfusion. c. the blood transfusion was mismatched and contained pyrogens. d. the blood transfusion was mismatched. e. the recipient had previously been exposed to the blood group antigens of the blood transfusion.

b. the blood transfusion was mismatched, and the recipient had previously been exposed to the blood group antigens of the blood transfusion.

Explanation:

This incompatibility of blood groups, which leads to immune response of the recipient to recognise the donor's blood cells as antigens, and therefore attack the donor blood cells donated, causing lysis of the blood cells, leading to low oxygen saturation in the blood and difficulty in breathing and other complication.

b. the blood transfusion was mismatched, and the recipient had previously been exposed to the blood group antigens of the blood transfusion.

Explanation:

Blood transfusion giving a patient blood or its equivalent product intravenously. Necessary tests are normally carried out to ensure the blood to be transfused matches and is compatible with the blood or body system of the recipient.

However when symptoms like difficulty in breathing, fever, nausea and vomiting is visible after ten transfusion then it's obvious there was an error which involves blood transfusion being mismatched, and the recipient being previously been exposed to the blood group antigens of the blood transfusion