At what temperature range do Lactobacillus (Lacto) bacteria typically grow?

Lactobacillus bacteria thrive in environments that are conducive to their metabolic processes, which typically occur at moderate temperatures. The optimal temperature range for Lactobacillus growth is generally between 68°F to 113°F (20°C to 45°C). This makes the temperature range provided in the correct answer appropriate since it aligns closely with optimal conditions for these bacteria, facilitating their fermentation activities.

The other temperature ranges provided in the options don't align as well with the natural growth patterns of Lactobacillus. Generally, temperatures below 68°F can significantly slow down their fermentation processes, and conditions above 113°F can be too extreme, potentially leading to cell death. Thus, the temperature range in the correct answer effectively captures the ideal environment for Lactobacillus to thrive, promoting their role in various fermentation applications such as yogurt production and sour beer brewing.