Tropical medicine is the branch of medicine is dedicated to treatment, care and cure of tropical diseases, which are commonly occurring in developing countries due to lack of hygiene, knowledge etc. The most commonly occurring tropical diseases are Chagas disease, Dengue, Helminths, African trypanosomiasis, Leishmaniasis, Malaria, Sexually transmitted infections etc.
Infectious diseases are disorders caused by pathogenic microorganisms — such as bacteria, viruses, fungi or parasites. Some infectious diseases can be passed from person to person. Some are transmitted by bites from insects or animals. Medications used to treat infectious diseases includes antibiotics, antivirals, antifungals, antiprotozoals, and antihelminthics.