According to a recent study, ball pits pose a health risk to children. The study published in the American Journal of Infection Control examined six different ball pits and found more than 31 different kinds of bacteria.The dirtiest ball pit contained an average of 170,818 bacteria per ball. The types of bacteria found at the ball pits were linked to bladder infections and infections of the heart lining. Researchers found bugs including Enterococcus faecalis, Staphylocccus hominis, Streptococcus oralis, and Acinetobacter Iwofii. They can be the cause of sepsis meningitis, bloodstream infections, skin infections and pneumonia. Researchers also discovered a yeast that can cause fungal infections in people with weak immune systems. They also found bacteria associated with plants, dirt, water and certain foods were also found.These can cause blood and skin infections and eye infections in babies.