**Pathogenic** is not just a dangerous disease, it is often associated with factors that threaten human health as a whole. This term can be used to describe diseases, bacterial or viral, fungal or parasitic, that can lead to deterioration in physical and mental health, decreased immune defenses and other negative consequences.
Some of the most common pathogens that cause infectious diseases include bacteria, viruses, fungi, and parasites. For example, Salmonella bacteria can cause food poisoning, intestinal infections and kidney disease, causing serious illness and even threat to human life. Hepatitis B and C viruses and HIV can affect the liver, gastrointestinal tract and immune system of the body. Fungal infections can lead to mycoses that spread throughout the body and cause swelling, itching, leathery and other skin lesions. Parasites