Infectious diseases encompass a wide range of conditions caused by germs, including bacteria, viruses, fungi and parasites. You can contract an infectious disease by touching, eating, drinking or breathing something that contains a harmful germ. Germs can also spread through animal and insect bites, kissing and sexual contact. Infectious diseases are disorders caused by organisms such as bacteria, viruses, fungi or parasites. Many organisms live in and on our bodies. They're normally harmless or even helpful, but under certain conditions, some organisms may cause diseases. Some infectious diseases can be passed from person to person. Some are transmitted by bites from insects or animals. And others are acquired by ingesting contaminated food or water or being exposed to organisms in the environment. Signs and symptoms vary depending on the organism causing the infection, but often include fever and fatigue. Mild infections may respond to rest and home remedies, while some life-threatening infections may require hospitalization. Many infectious diseases, such as measles and chickenpox, can be prevented by vaccines. Frequent and thorough hand-washing also helps protect you from most infectious diseases. Areas of focus include, but are not limited to, bacterial and fungal infections, viral infections (including HIV/AIDS and hepatitis), parasitological diseases, tuberculosis and other mycobacterial diseases, vaccinations and other interventions, and drug-resistance, chronic infections, epidemiology and tropical, emergent, pediatric, dermal and sexually-transmitted diseases. Several antibiotics have been discovered following the discovery of penicillin. These antibiotics are helpful in treatment of infectious diseases considered death sentences for centuries. The general physician will diagnose the symptoms and prescribe the appropriate treatment.
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