Question

The yellowish fluid secreted by the mother during the initial days of lactation has abundant:

• A. IgA
• B. IgM
• C. IgE
• D. IgG

Answer 1

The Correct Option is A

The yellowish fluid secreted by the mother during the initial days of lactation is colostrum. Colostrum is rich in antibodies, particularly IgA (Immunoglobulin A), which plays a crucial role in protecting the newborn from infections.

IgA is the predominant antibody in colostrum and is vital for mucosal immunity. It helps protect the newborn’s gastrointestinal tract by preventing pathogens from entering through the mucous membranes.

Here’s the breakdown of the other options:

(2) IgM: IgM is the first antibody produced in response to an infection, but it is not the dominant antibody in colostrum.

(3) IgE: IgE is associated with allergic reactions and parasitic infections, not predominantly found in colostrum.

(4) IgG: IgG is the most abundant antibody in the blood but is less prevalent in colostrum compared to IgA.

Thus, the correct answer is (1) IgA.

Answer 2

The yellowish fluid is colostrum, which is rich in IgA antibodies. IgA provides essential immune protection to the newborn by protecting the mucous membranes from pathogens. This passive immunity is critical for early life defense.