Which amongst the following is not bacteria mediated process?

Curdling of milk is due to lactic acid fermentation by lactic acid bacteria. Fermentation of idly and dosa batter is due to fermentation by bacteria such as Leuconostoc. Cheese production is by the action of bacterium Propionibacterium sharmanii. Bread making is due to fermentation by a fungus Saccharomyces cerevisiae.