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Bacterial diseases are caused by coming in contact with certain types of bacteria. Depending on the type of disease, it can be spread through coughs and sneezes, contaminated food, or contact with infected people or animals.
Human immunodeficiency virus (HIV) is a virus that causes acquired immune deficiency syndrome (AIDS). HIV/AIDS weakens your ability to fight infections. It is contracted through unprotected sex or needle sharing with an infected person.
Human papillomavirus (HPV) is a group of viruses that are often transmitted sexually. HPV is very common. In many cases, an infection causes no symptoms and may go away without treatment. In other cases, HPV may result in genital warts or warts on the hands or feet. Some types of HPV can lead to cervical cancer, or cancer of the anus or penis.
A parasitic infection, or parasitosis, is an infection caused by a parasite, a small organism that lives in or on you and survives from the nutrients in your body. Parasites may enter your body through food or water or through your skin, or they may live on your skin. While some parasites are harmless, others cause disease.
Viral diseases are caused by coming in contact with certain types of viruses, microscopic organisms that attach to the body’s cells. Depending on the type of virus, it can be spread through coughs and sneezes, contact with infected people, or touching contaminated surfaces.