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Food Servings, Equivalents & Related
Tips 9
The most effective way to take in
adequate amounts of nutrients is to
eat a balanced diet. Well balanced diet should include a wide variety
of foods from four different food groups and other foods:
1. Grain Products
2. Vegetables and Fruit
3. Milk Products
4. Meat and Alternatives
5. Other Foods
Portions of food identical in weight do not necessarily have the same
caloric content, and similarly, portions identical in calorie count may
differ vastly in the amount of nutrition each provides.
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INFECTION
An infection is the detrimental colonization of a host organism by a
foreign species. The colonizing organism interferes with the normal
functioning and perhaps the survival of the host. The infecting
organism is referred to as a pathogen, which may be bacterial, a
parasite, fungal, or a virus, prion or viroid. The scientific study of
diseases in medicine caused by biological agents is infectious diseases.
All multicellular
organisms are colonized to some degree by extrinsic organisms, and the
vast majority of these exist in either a symbiotic, commensal, or
parasitic relationship with the host. An example of the former would be
the anaerobic bacteria species which colonize the mammalian colon, an
example of the latter would be the various species of staphylococcus
which exist on human skin. Neither of these colonizations would be
considered infections.
An infection is,
in effect, a war in which the infecting organism seeks to utilize the
host resources in order to multiply at the expense of the host.
The difference
between an infection and a colonization is often only a matter of
circumstance. Organisms which are normally non-pathogenic can become
pathogenic under the right conditions, and even the most virulent
organism requires certain circumstances to cause a compromising
infection. More...
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