In addition to endospores surviving, the cells that don't make it can be repaired by natural light exposure. This is because UV light exposure causes some wierd bonds to form in the DNA. Exposure to natural light can repair some of these damaged cells.
What bacteria survive best under UV light?
As far as I know there is no bacteria that can survive UV Radiation.
About the only thing I can think of that might survive are Bacterial Spores, such as the spores that are associated with Anthrax.
Reply:The greatest resistance to UV radiation, as with most environmental factors that kill bacteria, is the ability to form endospores. Spore-forming bacteria such as Bacillus are able to survive much higher doses of UV and other types of radiation. Spores can survive very harsh conditions (high/low temperature, low water, radiation, antibiotics, osmotic pressure, etc.) for extended periods of time before becoming active again when conditions improve.
Each individual organism has a inactivation curve based on amount and wavelength of UV radiation over time. Some information can be found by searching "UV inactivation curves", especially if you are looking for a particular organism. The environment of the organism also alters the amount of radiation required to inactivate (water or other fluid, embedded in meats, on surfaces, etc.).
Hope this is helpful.
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