A streptococcal infection is caused by bacteria known as Streptococcus. These bacteria can lead to various illnesses, ranging from mild conditions like strep throat to more severe diseases such as pneumonia or skin infections. Symptoms often include sore throat, fever, and swollen lymph nodes. Streptococcal infections are typically spread through respiratory droplets or direct contact with infected wounds. Diagnosis usually involves a physical examination and may include a throat swab. Treatment often consists of antibiotics, which can help reduce symptoms and prevent complications if started early.