Introduction Traveler’s diarrhea (TD) is a common illness that affects people traveling to areas with poor sanitation and hygiene. It is typically caused by consuming food or water contaminated with bacteria, viruses, or parasites. While TD is usually mild and…
Introduction Altitude sickness, also known as acute mountain sickness (AMS), occurs when a person ascends to high altitudes too quickly, typically above 2,500 meters (8,200 feet). At higher elevations, the air contains less oxygen, which can make it difficult for…
Introduction Winter vomiting disease, commonly known as norovirus infection, is a highly contagious viral illness that causes sudden onset of vomiting and diarrhea. Norovirus, a member of the calicivirus family, is the most common cause of acute gastroenteritis worldwide. Outbreaks…
Introduction Legionnaires’ disease is a serious type of pneumonia caused by infection with Legionella bacteria. The illness is named after an outbreak at an American Legion convention in 1976, but cases now occur worldwide. Legionnaires’ disease most commonly affects older…
Introduction Bronchitis is an inflammation of the lining of the bronchial tubes, which carry air to and from the lungs. The condition can be either acute or chronic. Acute bronchitis is usually caused by a viral infection and resolves within…
Introduction Gallstones are solid particles that form in the gallbladder, a small organ located beneath the liver. The gallbladder stores bile, a digestive fluid produced by the liver. Gallstones can range in size from tiny grains to large stones and…
Introduction Hepatitis A is a contagious liver infection caused by the hepatitis A virus (HAV). It is usually a short-term illness that does not lead to chronic liver disease, but it can cause significant discomfort and, in rare cases, severe…
Introduction Hepatitis B is a liver infection caused by the hepatitis B virus (HBV). Unlike hepatitis A, hepatitis B can become chronic, leading to long-term liver damage, cirrhosis, liver cancer, and liver failure. Hepatitis B is spread through contact with…
HIV (Human Immunodeficiency Virus) is a virus that attacks the body’s immune system, specifically the CD4 cells (T cells), which help the body fight infection. If left untreated, HIV can lead to the disease known as AIDS (Acquired Immunodeficiency Syndrome),…
Syphilis is a bacterial infection typically spread through sexual contact. It can cause serious health problems if left untreated, but it is curable with antibiotics, especially when detected early. Causes Syphilis is caused by the bacterium Treponema pallidum. It is…
