Document Detail

Subclinical mastitis may not reduce breastmilk intake during established lactation.
MedLine Citation:
PMID:  19243263     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: This study determined the effect of subclinical mastitis (SCM) on infant breastmilk intake.
DESIGN: Participants (60 Ghanaian lactating mothers and their infants) were from periurban communities in the Manya Krobo district of Ghana in 2006-2007. Bilateral breastmilk samples were obtained once between months 3 and 6 postpartum and tested for SCM using the California mastitis test (CMT) and the sodium/potassium (Na/K) ratio. Infants' 12-hour breastmilk intake was assessed by test weighing. CMT scoring for SCM diagnosis was scaled as >or=1 = positive (n = 37) and <1 = negative (n = 23). SCM diagnosis was confirmed as a Na/K ratio of >1.0 (n = 14).
RESULTS: Breastmilk intake was nonsignificantly lower among infants whose mothers had elevated Na/K ratios of >1.0 (-65.1 g; 95% confidence interval -141.3 g, 11.1 g). Infants whose mothers were positive for SCM with both CMT and Na/K ratio criteria had significantly lower breastmilk intake (-88.9 g; 95% confidence interval -171.1 g, -6.9 g) compared to those whose mothers tested either negative with both tests or positive on only one. Infant weight (p < 0.01) and frequency of feeding (p = 0.01) were independently associated with breastmilk intake. However, the effect of SCM on breastmilk intake disappeared when infant weight and feeding frequency were included in a multiple linear regression model.
CONCLUSIONS: The results of this study did not show an effect of SCM on breastmilk intake among 3-6-month-old infants. A larger sample size with a longitudinal design will be needed in future studies.
Richmond N O Aryeetey; Grace S Marquis; Lucy Brakohiapa; Leo Timms; Anna Lartey
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Breastfeeding medicine : the official journal of the Academy of Breastfeeding Medicine     Volume:  4     ISSN:  1556-8342     ISO Abbreviation:  Breastfeed Med     Publication Date:  2009 Sep 
Date Detail:
Created Date:  2009-09-10     Completed Date:  2009-11-23     Revised Date:  2013-06-02    
Medline Journal Info:
Nlm Unique ID:  101260777     Medline TA:  Breastfeed Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  161-6     Citation Subset:  IM    
Department of Population, Family, and Reproductive Health, School of Public Health, University of Ghana, Legon, Ghana.
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MeSH Terms
Drinking / physiology*
Infant Nutritional Physiological Phenomena / physiology
Lactation / metabolism*
Mastitis / diagnosis,  metabolism*
Milk, Human / chemistry*,  secretion*
Postpartum Period
Potassium / adverse effects,  analysis
Sodium / adverse effects,  analysis
Time Factors
Young Adult
Grant Support
Reg. No./Substance:
7440-09-7/Potassium; 7440-23-5/Sodium

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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