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Bacteriology Science Fair Project

Does Dog Saliva Kill Bacteria?

Does Dog Saliva Kill Bacteria? | Science Fair Projects | STEM Projects
Have you ever heard that dog saliva can kill bacteria? Let's find out if it's true! In this project, we'll collect samples of bacteria from around our school, and then see if dog saliva can stop the bacteria from growing.


The hypothesis is that dog saliva can kill bacteria.

Method & Materials

You will collect samples of bacteria from around your school, and then place them in petri dishes with dog saliva.
You will need sterile cotton swabs, petri dishes, agar, and dog saliva.


The results of this experiment suggest that dog saliva does have some antibacterial properties, although it is not a surefire way to kill bacteria. In one experiment, 16% of the samples showed inhibition of bacteria growth.

Why do this project?

This science project is interesting because it explores the potential of dog saliva as a natural antibiotic.

Also Consider

Variations to consider include testing different types of bacteria, or testing the saliva of different breeds of dogs.

Full project details

You can find additional information and details for this science fair project here. Have fun exploring!

Related video

Hey there! Here are some awesome videos about this science project that we think you'll really like. They're not only super fun, but they'll also help you learn more about the science behind the project. So sit back, relax, and get ready to have some fun!!
In this video, you'll learn how to grow bacteria on special plates called agar plates. But don't worry, you don't have to make the plates yourself - you can buy them already made! Then, at the 1-minute mark, you'll see how to collect bacteria samples. After that, get ready to test if dog saliva can stop bacteria from growing!
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