You see pus at the site of infection on your skin. How is it formed? 

Difficulty: Medium

Pus is a whitish-yellow, yellow, or yellow-brown exudate produced by vertebrates during inflammatory pyogenic bacterial infections. Pus is produced from the dead and living cells that travel into the intercellular spaces around the affected cells.

The most common agents that induce pus formation are bacteria, such as Staphylococcus aureus. In addition, some chemical agents can cause pus creation.

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