All substances take up the least amount of volume in their (1.) solid phase, a little more volume in their (2.) liquid phase, and the largest amount of volume in their (3.) gas phase. The closer atoms or molecules get to one another, the less volume is occupied by the substance that they comprise.
A large, retrospective series examining human bite wounds in children found that none of the bites manifesting as abrasions became infected, while the rate of infection was much higher in bite wounds that caused punctures or lacerations.
Answer has. 2 votes. Vote for this answer. While this very long and scholarly article does not say which animal, mammal or non mammal, has the dirtiest mouth/bite, it does state that a bite from a human is more likely to become infected. Excerpt: As we continue to improve methods in trauma care, survival from major animal attacks has increased. This has resulted in a higher rate of infection (along with the evaluation of the oral microbiology of biting animals), but has also given scientists the opportunity to better prevent and, if needed, treat infected bite wounds.