Bacteria are ubiquitous, mostly free-living organisms often consisting of one biological cell. They constitute a large domain of prokaryotic microorganisms. Typically a few micrometres in …

Dec 7, 2025 · Although bacterial cells are much smaller and simpler in structure than eukaryotic cells, the bacteria are an exceedingly diverse group of organisms that differ in size, shape, …

As of 2021, 1,513 bacterial pathogens have been described [1]. Despite this large number, scientists estimate that pathogens make up less than 7% of all described bacterial species [2]. …

May 21, 2025 · Several bacterial species like Bifidobacterium, E.coli, Lactobacillus, etc. are used as probiotics. Bacteria are used in producing fermented food products like fermented dairy …

Oct 19, 2023 · Bacteria are microscopic infectious agents that have a long history of infecting humans, but they also play a vital role in supporting human health.

Bacterial infections are caused by harmful bacteria and can affect many parts of your body. They can be minor or serious and are often treated with antibiotics.

Bacteria are microscopic, single-celled organisms. They are among the earliest known life forms on earth. There are millions of different kinds of bacteria, and they live in every conceivable …

Aug 8, 2025 · In 1838, the German naturalist Christian Gottfried Ehrenberg called them ‘bacteria’, from the Greek word ‘baktḗria’, meaning ‘little stick’. Later, Robert Koch’s research, famously …

5 days ago · Bacteria are small single-celled organisms. Bacteria are found almost everywhere on Earth and are vital to the planet's ecosystems. Some species can live under extreme …

Apr 18, 2025 · These tiny, single-celled organisms—bacteria—are among the most ancient, numerous, and influential forms of life on Earth. They are so small that millions can live in a …