An object of the invention is to provide a bacterial growth inhibitor or
bacteriostatic agent against thermo-resistant and acid-resistant bacteria
(TAB: thermo acidophillic bacilli), such as bacteria belonging to the
genus Alicyclobacillus, in particular, guaiacol-producible
Alicyclobacillus acidoterrestris, Alicyclobacillus acidiphilus, and
Alicyclobacillus herbarium, the bacterial growth inhibitor or
bacteriostatic agent being derived from naturally occurring substances
and facile in procurement, preparation, and handling. The invention
provides a bacterial growth inhibitor or bacteriostatic agent against
bacteria belonging to the genus Alicyclobacillus, which contains acerola
fruit juice as an active ingredient.