Neck cysts and fistulas are uncommon but important causes of swelling or lumps in the neck. While most neck swellings are due to enlarged lymph nodes, cysts and fistulas are typically congenital, meaning they are remnants from fetal development. These…
Introduction Reye’s syndrome is a rare but serious condition that causes sudden swelling in the liver and brain. It most often affects children and teenagers recovering from a viral infection, such as the flu or chickenpox. The exact cause is…
Introduction Diphtheria is a serious bacterial infection that primarily affects the mucous membranes of the throat and nose. It is caused by the bacterium Corynebacterium diphtheriae. Although rare in countries with widespread vaccination, diphtheria can be life-threatening if not treated…
Introduction Ebola virus disease (EVD), commonly known as Ebola, is a rare but severe and often fatal illness caused by infection with the Ebola virus. Outbreaks have primarily occurred in sub-Saharan Africa, but the disease is a global health concern…
Introduction Yellow fever is a serious viral infection transmitted by mosquitoes, primarily in parts of Africa and South America. The disease gets its name from the jaundice (yellowing of the skin and eyes) that can occur in severe cases. While…
Introduction Anthrax is a rare but serious infectious disease caused by the bacterium Bacillus anthracis. It primarily affects animals such as cattle, sheep, and goats, but humans can become infected through direct or indirect contact with sick animals or contaminated…
Introduction Mpox, formerly known as monkeypox, is a rare viral disease that can infect both humans and animals. It is caused by the monkeypox virus, which is related to the virus that causes smallpox, though mpox is generally less severe.…
Introduction Rabies is a deadly viral disease that affects the central nervous system of mammals, including humans. Once symptoms appear, rabies is almost always fatal. However, the disease is preventable through prompt medical care after exposure. Rabies is found worldwide,…
Introduction Tetanus, also known as lockjaw, is a serious but preventable disease caused by a toxin produced by the bacterium Clostridium tetani. The bacteria are commonly found in soil, dust, and animal feces. Tetanus can cause severe muscle stiffness and…
Introduction Toxic shock syndrome (TSS) is a rare but life-threatening condition caused by toxins produced by certain types of bacteria, most commonly Staphylococcus aureus and, less frequently, Streptococcus pyogenes. TSS can develop rapidly and affect multiple organ systems. Early recognition…
