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 initial days of lactation in mothers produce a fluid known as colostrum. This fluid is particularly rich in immunoglobulins, which are essential for the newborn's immune protection. 

Among the different types of immunoglobulins, colostrum is especially abundant in IgA (Immunoglobulin A). IgA plays a crucial role in mucosal immunity, which is vital for protecting the surfaces of the infant's gut, respiratory tract, and other areas exposed to the external environment.

IgA provides passive immunity to the newborn, safeguarding them from infections during the early days when their immune system is still developing.

The other types of immunoglobulins mentioned: IgM, IgE, and IgG, are present in different concentrations and serve various functions, but IgA is predominant during this period.

Therefore, the correct answer is: IgA.

Answer 2

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.