For the first family_lab this year, we welcomed children and their parents into the lab after school to have a go at growing their own yogurt. After comparing top trumps on some really horrible bacteria, we found a more friendly looking one: Lactobacillus Acidophilus: the yogurt bacteria! we found some yogurts from the shops which listed their bacteria, then mixed a spoonful of yogurt with warm milk to give the bacteria something to eat and grow in, hopefully turning the milk into yogurt.
We had to be very careful to make and keep the jars and spoons sterile by boiling then, so that only yogurt bacteria would grow. We heated the milk to 80°C to kill any cheesy bacteria hiding in it, then had to wait and cool the milk back down to 50°C so it wouldn’t kill the yogurt bacteria.
What foody microorganism shall we investigate next?