Evidence map›Paper›PMID 17195249›Full record

ReviewMolecular nutrition & food research2007

Overview of antibacterial, antitoxin, antiviral, and antifungal activities of tea flavonoids and teas.

Mendel Friedman

Abstract readReview
In one paragraph

Review in Molecular nutrition & food research, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 175 papers.

0numbers the graph read from it
0cells of the map it votes in
175citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

175 citing papers in PubMed.

  1. CanInternational journal of molecular sciences · 2026
    Article
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  4. Review
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  15. Article
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  19. Antimicrobial Activity of Leaf Aqueous Extract ofPlants (Basel, Switzerland) · 2024
    Article
  20. Antioxidant and Antidiabetic Activity ofMolecules (Basel, Switzerland) · 2024
    Article

115 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

1 author.

Mendel FriedmanWestern Regional Research Center, Agricultural Research Service, United States Department of Agriculture, Albany, CA, USA. mfried@pw.usda.gov

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Tea leaves produce organic compounds that may be involved in the defense of the plants against invading pathogens including insects, bacteria, fungi, and viruses. These metabolites include polyphenolic compounds, the six so-called catechins, and the methyl-xanthine alkaloids caffeine, theobromine, and theophylline. Postharvest inactivation of phenol oxidases in green tea leaves prevents oxidation of the catechins, whereas postharvest enzyme-catalyzed oxidation (fermentation) of catechins in tea leaves results in the formation of four theaflavins as well as polymeric thearubigins. These substances impart the black color to black teas. Black and partly fermented oolong teas contain both classes of phenolic compounds. A need exists to develop a better understanding of the roles of polyphenolic tea compounds in food and medical microbiology. This overview surveys and interprets our present knowledge of activities of tea flavonoids and teas against foodborne and other pathogenic bacteria, virulent protein toxins produced by some of the bacteria, virulent bacteriophages, pathogenic viruses and fungi. Also covered are synergistic, mechanistic, and bioavailability aspects of the antimicrobial effects. Further research is suggested for each of these categories. The herein described findings are not only of fundamental interest, but also have practical implications for nutrition, food safety, and animal and human health.

Indexed as

TeaAnti-Bacterial AgentsAntifungal AgentsAntiviral AgentsBiological AvailabilityFlavonoidsPlant LeavesToxins, BiologicalAnti-Bacterial AgentsAntifungal AgentsAntiviral AgentsFlavonoidsTeaToxins, Biological

Identifiers

PMID17195249
PMCPMC7168386

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.