You searched for: “amathophobia
amathophobia (s) (noun) (no plural)
An excessive horror of contaminations and germs: Those suffering from amathophobia also include dust as part of their anxieties.

Some people who are affected with amathophobia keep the windows in their residences closed at all times and install elaborate air-filtering equipment.

There are also individuals who constantly wipe surfaces and clean their living quarters so often that they may be considered to have an obsessive-compulsive disorder known as amathophobia.

An excessive dread of dust.
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Because personal hygiene is a means of controlling infectious diseases, the absence of dirt is not merely an esthetic adornment. Cleanliness is no doubt an acquired taste.

—Compiled from "Cleanliness has only recently become a virtue"
by Jay Stuller; Smithsonian; February, 1991; pages 126-135.