What is the main immunoglobulin isotype that colostrum contains?
See a clue in the article The immune system and immunity in swine: maternal and neonatal immunit
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incorrect answer
After birth and for 24 hours, IgGs (main isotype in colostrum) pass from mammary secretions into neonate’s blood, while IgA, once passed through the blood, circulate and reach the respiratory epithelia by exudation and also the intestinal epithelium.
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