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Tuberculosis
( Added:Fri Jan 13 2006)
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| Tuberculosis is an infection with the bacterium
Mycobacterium tuberculosis, which most commonly
affects the lungs (pulmonary TB) but can also affect the
central nervous system (meningitis), lymphatic system,
circulatory system (miliary TB), genitourinary system,
bones and joints.
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Water conditions
( Added:Fri Jan 13 2006)
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| The dissolved content of water is perhaps the most
important aspect of water conditions, as dissolved salts
and other constituents can dramatically impact basic
water chemistry, and therefore how organisms are able
to interact with their environment. Salt content, or
salinity, is the most basic classification of water
conditions. An aquarium may have fresh water (a salt
level of <0.5%), simulating a lake or river environment;
salt water (a salt level of 5%–18%), simulating an ocean
or sea environment; or brackish water (a salt level of
0.5%–5%), simulating environments lying between fresh
and salt, such as estuaries.
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