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I found this sentence confusing

Transitor carriers of staphylococcal infections 70% because of mupirocin i/n.

Mupirocin is drug which affects some way. I am not sure if the statement means inner neuronal.

I am little confused by the abbreviation i/n. What is the point of the sentence?

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up vote 1 down vote accepted

This comes from the usage of the Mupirocin: Its an antibiotic, which is used topically (on the skin, its not taken in form of pills). It binds specifically to the isoleucyl t-RNA synthetase in gram positive bacteria and Streptoccus and Staphylococcus and is used to fight intranasally (that what i/n stands for) infections with these bacteria. It inhibts the introduction of isoleucine into proteins. More informations can be found here.

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