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. 1981 Jan;13(1):22–29. doi: 10.1128/jcm.13.1.22-29.1981

Effects of antibodies, trypsin, and trypsin inhibitors on susceptibility of neonates to rotavirus infection.

B S McLean, I H Holmes
PMCID: PMC273714  PMID: 6257755

Abstract

Levels of antirotaviral secretory immunoglobulin A were measured by enzyme-linked immunosorbent assay in colostrum and milk samples collected daily for the first 5 days postpartum from 49 mothers breast-feeding their infants. The trypsin-inhibitory capacity of these lacteal secretion samples was assessed by their ability to inhibit the hydrolysis of alpha-N-benzoyl-DL-arginine-p-nitroanilide by trypsin. Stools passed by these breast-fed infants and by an additional 43 bottle-fed infants were pooled by individual and examined by electron microscopy for rotavirus. Stool trypsin levels were estimated with the gelatin hydrolysis test. Breast-fed infants were significantly less likely to become infected with rotavirus and showed significantly lower stool tryptic activity than did bottle-fed infants. Breast-fed infants who did not excrete rotavirus over the 5-day period received milk of significantly higher antirotaviral secretory immunoglobulin A or trypsin-inhibitory capacity or both than breast-fed infants who were infected with rotavirus. A case of probable maternal rotavirus infection during pregnancy, producing greatly elevated lacteal antirotaviral secretory immunoglobulin A levels lasting for 2 years, was detected. Results of this study suggest that both antibodies and trypsin inhibitors in human milk can be associated with the protection of neonates against rotavirus infection in the first 5 days of life.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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