PRCC Microbiology Practice Exam

Secretory IgA is a crucial component of breast milk, providing essential immune protection to infants by forming a barrier against pathogens in the gastrointestinal tract. It is consistently present in breast milk, supporting the newborn's developing immune system. In addition to secretory IgA, IgG can also be found in breast milk, particularly when the mother is experiencing an active immune response, such as during an infection. This happens because the mother’s body produces antibodies specific to the pathogens she encounters, and some of these antibodies, including IgG, can be transferred to the infant through breast milk. This transfer helps provide SAMPLEimmediate passive immunity to the infant, protecting them from similar infections. Thus, the statement is true because both secretory IgA and IgG can be present in breast milk; the presence of IgG is linked to the mother’s active immune status, which enhances the immune support provided to the infant.