Bacterial infections can result in the presence of which of the following?

Pus is a thick fluid that is usually produced as a response to infection, particularly bacterial infections. When the body fights off bacteria, white blood cells accumulate at the site of infection, leading to inflammation and the eventual formation of pus as a result of dead white blood cells, bacteria, and tissue debris. This sign is often seen in abscesses or infected wounds, making it a direct indicator of a bacterial infection.

While cough, fever, and skin rash can also be associated with infections, they are not exclusive to bacterial infections. Cough may indicate respiratory issues, fever can arise from various kinds of infections (including viral), and skin rash can be related to numerous causes, including allergic reactions or viral infections. In contrast, pus is a more specific symptom directly linked to the body’s response to bacterial pathogens.