opsonic index

noun

1. the ratio of the number of bacteria destroyed by phagocytes in the blood of a test patient to the number destroyed in the blood of a normal individual

Example Sentences

It is present to a certain extent in normal serum, but can be greatly increased by the process of immunization; and the “opsonic index,” or relation between the number of organisms taken up by leucocytes when treated with the serum of a healthy person or “control,” and with the serum of a person affected with any bacterial disease and under treatment by immunization, is regarded by some as representing the degree of immunity produced.

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He goes minutely into the consideration of immunity, opsonic index, reproduction, sterilization, antiseptics, biochemic tests, culture-media, isolation of cultures, the manufacture of the various toxins, antitoxins, tuberculins, and vaccines that have proved of diagnostic or therapeutic value.

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This fraction, expressed as a percentage of unity = the opsonic index.

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A large number of favourable results obtained by such treatment controlled by the observation of the opsonic index have already been published, but it would be unwise at present to offer a decided opinion as to the ultimate value of the method.

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The effect of the injection of a small quantity of vaccine is usually to produce an increase in the opsonic index within a few days.

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