Todd unit
The unit in which the results of testing for antistreptolysin O (ASO) are expressed. It denotes the reciprocal of the highest dilution of test serum at which there continues to be neutralization of a standard preparation of the streptococcal enzyme streptolysin O.
Dictionary > Todd unit
You will also like...

Plant Biology
Plantlife can be studied at a variety of levels, from the molecular, genetic and biochemical level through organelles, c..

Protein Synthesis
Part of the genetic information is devoted to the synthesis of proteins. mRNA, a type of RNA, is produced as a transcri..

Sugar Homeostasis
The blood sugar level is regulated by two hormones. The mechanism behind this type of negative feedback control is descr..

Ecosystem Succession
If the balance of nature is left untouched, landscapes can change dramatically over time. A previous ecosystem is supers..

Lotic Communities & Algae
Lotic communities have conditions that are rather harsh for typical plants. Thus, the diversity of plant species in loti..

Animal Water Regulation
Animals adapt to their environment in aspects of anatomy, physiology, and behavior. This tutorial will help you understa..