Petri Dish Bathroom Bacteria

Friday, August 14, 2020

Petri Dish Bathroom Bacteria

There is more biomass of bacteria on earth than the combination of all plants and animals. Colony morphology is a method that scientists use to describe the characteristics of an individual colony of bacteria growing on agar in a petri dish.

Growing Bacteria Kit Steve Spangler Science

Growing bacteria in petri dishes.

Petri dish bathroom bacteria. We can collect and grow them in specially prepared petri dishes. Swab along any surface to test your mouth the bathroom counter etc. She went on to explain that the dish has several strains of possible pathogenic fungi and bacteria.

If you want to grow bacteria in a petri dish prepare an agar by mixing 12 teaspoon of agar powder with 14 cup of water. There are bacteria everywhere. Youll get six large petri dishes 10 cm 4 in in diameter a microwave safe plastic beaker cotton swabs and the highest quality nutrient agar.

Place the mixture in the microwave for 1 minute until the water boils and then let it cool to room temperature before pouring the mixture into the dish. Also it is shown between the comparison that the places with the most bacteria in the sinks are the drain and the place with the least amount of bacteria is the surface. Take samples around you and see what bacteria will grow in an agar filled petri dish.

This is the same nutrient agar used by. Door handles your hands under your fingernails the top of a desk a pencil or a pen the area around a bathroom sink a calculator or a favorite toy. In my results the most colonies in the petri dish are in the drain part of the petri dish and is shown to be 337 colonies in the kitchen and 177 in the bathroom.

To prepare agar plates just heat and pour into a sterile petri dish. Students should examine cultures in containers which have been taped and closed. Ward chose one of those jet like dyson hand dryers in a public womens bathroom and was surprised to find more abundant colonies on her dish than any of her classmates got.

There are about a million bacteria cells per milliliter of water. Blood agar or tryptic soy agar with 5 sheeps blood is an excellent medium for supplying bacteria with nutrients and an environment in which we can see them grow. The image shows a petri dish with several things growing quite large in it after just 48 hours.

Observing bacteria in a petri dish. Most bacteria will grow well using nutrient agar but some more fastidious bacteria prefer tryptic soy agar. Bacteria are microorganisms that grow everywhere.

The assignment was to put a petri dish loaded with sabdex agar in an environment for three minutes close it up and incubate for 48 hours.

Growing Bacteria In A Petri Dish Stem Activity For Kids Gift