The source of lactose is cow's milk.
There are different types of food that are a good source of hydrogen. This mostly includes sugars like lactose, fructose and sucrose among others.
Probably because that is where the gram negative bacteria have found a food source. Lactose is not the perfered diet, but it works and they are most likely there because they can tolerate the environment, and survive (on lactose) when their #1 food source is not available.
Lactose is also called "milk sugar" because it comes from milk. Think LACTose, like in lactate, lactation, etc.
Food manufacturing and processing is the predominant industry of the Philippines.
Dairy products such as milk, yogurt, and cheese contain lactose, a type of sugar.
Yes, Citrobacter species are capable of fermenting lactose. They possess the necessary enzymes to break down lactose into glucose and galactose, allowing them to use lactose as a source of energy.
no, it shows negative for lactose fermentation on MacConkey's agar
it allows bacteria to regulate the expression of genes involved in lactose metabolism in response to lactose availability. This enables efficient utilization of lactose as an energy source only when needed, conserving cellular resources when lactose is not present in the environment.
It means that the organism can use Lactose as an energy source
The genes that produce the enzymes needed to break down lactose are not expressed.
milk
Sucrose, Lactose, Maltose