Question

Why did the particular medicine effective against disease caused by a particular group of organisms and not the others?

Answer 1

reason for every disease is different their are many helmithes that occur disease and theirfore for a specific helminth their is a specific type of medicine that can be block it's machenical pathway and different organisms have different type of pathways so medicines are also different....
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Answer 2

Answer:

A particular medicine acts by stopping or interfering with the particular biochemical pathway like cell wall synthesis or protein synthesis in microbes. A particular medicine is effective against a particular group of bacteria entering into the body have different binding sites and biochemical pathway at which the medicines can act upon.