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Koffie en thee tegen bacteriële infecties*
Omdat koffie en thee bekend staan om hun antibacteriële werking is in deze Amerikaanse studie gekeken of het drinken van koffie en thee ook effect heeft op de superbacterie MRSA (Meticilline-resistente Staphylococcus aureus). MRSA wordt bij wel 1,4% van de bevolking aan getroffen op de slijmvliezen in de neusholte. Uit de studie blijkt dat het regelmatig drinken van hete thee en koffie de kans op de aanwezigheid van MRSA in de neusholte wel met de helft doet verminderen. Frisdranken en ice-tea hadden dit effect niet en kunnen onder bepaalde omstandigheden de kans licht verhogen.
Tea and Coffee Consumption and MRSA Nasal Carriage
1. Eric M. Matheson, MD, MS, 2. Arch G. Mainous III, PhD, 3. Charles J. Everett, PhD and 4. Dana E. King, MD, MS
+ Author Affiliations
1. Department of Family Medicine, Medical University of South Carolina, Charleston, South Carolina
1. CORRESPONDING AUTHOR: Eric M. Matheson, MD, MS, Department of Family Medicine, Medical University of South Carolina, 295 Calhoun St, Charleston, South Carolina 29425, Matheson@musc.edu
Abstract
PURPOSE Hot tea and coffee have been found to have antimicrobial properties. The purpose of this study was to determine whether the consumption of tea, coffee, or both is associated with less frequent nasal carriage of methicillin-resistant Staphylococcus aureus (MRSA). 
METHODS We performed a secondary analysis of data from the 2003–2004 National Health and Nutrition Examination Survey to investigate the relationship between the consumption of coffee, hot tea, cold tea, and soft drinks, and MRSA nasal carriage among the noninstitutionalized population of the United States. 
RESULTS An estimated 2.5 million persons (1.4% of the population) were MRSA nasal carriers. In an adjusted logistic regression analysis controlling for age, race, sex, poverty-income ratio, current health status, hospitalization in the past 12 months, and use of antibiotics in the past month, individuals who reported consuming hot tea were one-half as likely to have MRSA nasal carriage relative to individuals who drank no hot tea (odds ratio = 0.47; 95% confidence interval, 0.31–0.71). Similarly, individuals who reported consuming coffee had about a one-half reduction in the risk of MRSA nasal carriage relative to individuals who drank no coffee (odds ratio = 0.47; 95% confidence interval, 0.24–0.93). 
CONCLUSIONS Consumption of hot tea or coffee is associated with a lower likelihood of MRSA nasal carriage. Our findings raise the possibility of a promising new method to decrease MRSA nasal carriage that is safe, inexpensive, and easily accessible. 
Het volledige artikel. (Januari 2012)