Fermented foods
Lactic species acidify vegetables and milk into stable, flavourful foods.
Darker cells mean a higher score for this topic on that metric.
Familiarity95
Medical weight72
Benefit78
Risk55
Research90
Live debate30
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Last reviewed Sources & creditsMedia creditsMethodology
Quick answers
Where should I start with Bacteria?
Read Identity → How they live → Body & health, then use compare rails.
Is this page advice for Bacteria?
Public-health education — not a care plan, prescription, or outbreak briefing.
What does the local lens add?
It names everyday desks for Tree of microbes before English norms look universal.
Are the scores a ranking of Bacteria?
No — editorial 0–100 browsing aids inside this atlas only.
How do I compare Bacteria to neighbours?
Use related cards and best-of / quiz rails after the first three chapters.
Which chapter is densest?
How they live and Body & health carry mechanisms; skim Identity first.
Kitchens already run microbial factories: yoghurt, cheese, kimchi, sourdough. The same word 'bacteria' covers dinner and disease because the tree is huge.
Trying to bleach every surface is neither possible nor wise. Target high-risk moments: raw meat juices, toilets, wounds, hospital devices.
Everyday uses
Compost & soil
Decomposers return nutrients; sterilised soil is a poor garden.
Wastewater
Treatment plants farm bacteria to eat dissolved pollution.
Food safety clock
The 'danger zone' is about doubling time in warm protein, not mysticism.
Oral ecology
Plaque is a community; sugar and time shift it toward cavities.
Travel guts
New water and food mean new neighbours; most upsets are self-limited, some are not.
A useful household rule: respect moisture, time and protein — that is where unwanted growth actually happens.
Keep exploring
More in Tree of microbes
Viruses
Packets of DNA or RNA that are not cells — they replicate only inside living hosts.
Familiarity 96Fungi
A eukaryotic kingdom of yeasts, moulds and mushrooms — chitin walls, external digestion, partners of plants.
Familiarity 80Archaea
A prokaryotic domain that is not bacteria — methanogens, extremophiles and no known human pathogens.
Familiarity 35Bacteriophages
Viruses that infect bacteria — Earth's most abundant biological entities, and a concept-level idea in medicine.
Familiarity 42Protozoa
Motile unicellular eukaryotes — a teaching grade that includes pond ciliates and a minority of serious parasites.
Familiarity 58