What is the primary function of lactogenic immunity in production animals?

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BlackTom AI · Accepted Answer

Consider the concept of lactogenic immunity and its role in production animals. 
Option 1: 'To provide systemic protection against all pathogens' overstates lactogenic immunity. Lactogenic immunity primarily acts in the mucosal gut environment of the neonate rather than providing broad systemic protection against every pathogen. 
Option 2: 'To protect against enteric pathogens in suckling animals' accurately captures the core purpose. Colostrum and milk deliver antibodies, especially secretory IgA, to the newborn, creating targeted protection for the gut against enteric microbes during a vulnerable period. This is the classic function of lactogenic immunity in production animals. 
Option 3: 'To stimulate the development of the adaptive immune system' confuses passive protection with active immune maturation. Lactogenic immunity provides passive antibodies to the offspring rather than directly stimulating the neonate’s own immune system development. 
Option 4: 'To enhance the efficacy of vaccines' is not the primary function of lactogenic immunity. While maternal antibodies can influence vaccine responses in the offspring, the main purpose of lactogenic immunity is not vaccine enhancement but gut protection via passive transfer. 
Option 5: 'To transfer cell-mediated immunity to offspring' is inaccurate for lactogenic immunity, which is mainly humoral (antibody-mediated) transfer through colostrum and milk rather than transferring cell-mediated immunity. 
In summary, the statement that best aligns with the established role of lactogenic immunity is that it provides protection against enteric pathogens in suckling animals, through the transfer of antibodies via milk and colostrum, offering mucosal defense during early life.

AGRI20044_2025_SM1 Supplementary/Special Exam: Microbiology in Agriculture (AGRI20044_2025_SM1)- Requires Respondus LockDown Browser

What is the primary function of lactogenic immunity in production animals?

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