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3-Pyridine-carboxaldehyde and 3-pyridine-aldoxime were effective and specific inhibitors of the uptake of both nicotinic acid (NA) and nicotinamide (ND) by Bordetella pertussis, although neither compound inhibited the growth of the bacteria in liquid medium or the oxidation of glutamate by washed suspensions. In contrast, the following pyridine derivatives did not inhibit uptake of NA or ND: iso-NA, iso-ND, isoniazid, 6-amino-NA and 6-amino-ND, 3-acetyl-pyridine, 3-pyridyl-acetic acid, N,N-diethyl-ND and 3-pyridine-sulphonic acid. 3- Pyridyl-carbinol was inhibitory, but less so than the first listed compounds.

Inhibition of Nicotinic Acid and Nicotinamide Uptake into Bordetella pertussis by Structural Analogues