Anonymous
Anonymous asked in Science & MathematicsBiology · 1 decade ago

Is it possible to see bacteria with the naked eye?

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  • Anonymous
    1 decade ago
    Favourite answer

    Snitch you can:

    World’s largest bacterium—In 1999 scientists discovered a previously unknown bacterium, which is large enough to be seen with the naked eye.

    Found off the coast of Namibia, the bacteria grow in long lines of single cells, each stuffed with reflective white globules of sulfur.

    The bacteria resembled a string of pearls to its discoverers, who named it Thiomargarita namibienus (“Sulfur pearl of Namibia”).

    The bacteria have evolved to live on seafloor sediments, where they find hydrogen sulfide for energy and nitrate for respiration.

    Good day.Check in http://bisbio.in

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  • Anonymous
    4 years ago

    I think it's more likely that you're seeing the red cells travelling through capillaries across your retina (the light sensor at the back your eyes). These capillaries are there all the time, but our brain "ignores" the shadow from them, and it learns that they are not part of the visual field. When you lie down, the pressure on the eye can deform it very slightly allowing you to "see" vessels your brain usually ignores (or adapts to the presence of). Oblique light entering the eye will help this effect; as will staring at a blank wall. You may well see these tiny "microbes" moving in a column/line; capillaries are narrow and so the red cell tend to progress in a line. By the way, red cells are about 7 micrometers across, so "microbes" is about right.

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  • RoyW
    Lv 5
    1 decade ago

    Most INDIVIDUAL bacteria are too small to see without magnification, but there are a few exceptions (check the links in the previous answers).

    It is also possible to see bacteria as colonies (usually when they are deliberately grown on agar plates after swabs are taken);

    http://www.biology.ed.ac.uk/research/groups/jdeaco...

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  • Anonymous
    1 decade ago

    yes bacterium like Epulopiscium fishelsoni, largest bacterium which reaches length of 0.7 mm (thus 150 times bigger than larger bacteria). is possibly visible to our naked eye....

    search for it in:

    http://news.softpedia.com/news/The-Largest-Bacteri...

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  • ?
    Lv 6
    1 decade ago

    No, they're too small. They're about 1/10 the size of our cells, which we also can't see.

    Edit: I guess http://en.wikipedia.org/wiki/Thiomargarita_namibie... can be. In general, no, though.

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  • 1 decade ago

    No. only visible under microscope.

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  • Anonymous
    1 decade ago

    Have you seen any.. Go Figure!!

    Source(s): ME
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  • 1 decade ago

    no ,,,but their effects

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