If you are given antibiotics to treat a STD, it is important that you take all of the drug prescribed to you, even if the symptoms go away. Also, do not take someone else's medication to treat your infection; it may make it more difficult to treat. Here are some specific STD treatments:
LDL and HDL are very different lipoproteins. LDL is generally fatty acid rich with cholesterol ester (CE) core. Its density is low because it carried a lot of traiglycerides (TG) and so floats. It has a specific apolipoprotein marker which tells the body which lipoprotein it is.
The LDL/HDL ratio is actually a purer ratio than total cholesterol/HDL, because LDL is a measure of bad' cholesterol and HDL is a measure of good cholesterol, whereas the total cholesterol is the sum of HDL, LDL, and the VLDL. Adding up the values for the HDL, LDL and VLDL makes up the total cholesterol measurement.