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An infectious disease, also known as a transmissible disease or communicable disease, is an illness resulting from an infection. Infections can be caused by a wide range of pathogens, most prominently bacteria and viruses. [ 2] Hosts can fight infections using their immune systems.
Epstein–Barr virus infectious mononucleosis (Mono) Fever – usually lasting 14 days; often mild. Sore throat – usually severe for 3–5 days, before resolving in the next 7–10 days. Swollen glands – mobile; usually located around the back of the neck (posterior cervical lymph nodes) and sometimes throughout the body.
A contagious disease is an infectious disease that is readily spread (that is, communicated) by transmission of a pathogen through contact (direct or indirect) with an infected person. [ 1] A disease is often known to be contagious before medical science discovers its causative agent. Koch's postulates, which were published at the end of the ...
Human parvovirus B19 is a common and highly contagious seasonal respiratory infection, Dr. William Schaffner, professor of infectious diseases at Vanderbilt University Medical Center, tells TODAY ...
This is a list of the largest known epidemics and pandemics caused by an infectious disease in humans. Widespread non-communicable diseases such as cardiovascular disease and cancer are not included. An epidemic is the rapid spread of disease to a large number of people in a given population within a short period of time; in meningococcal ...
Cholera ( / ˈkɒlərə /) is an infection of the small intestine by some strains of the bacterium Vibrio cholerae. [ 4][ 3] Symptoms may range from none, to mild, to severe. [ 3] The classic symptom is large amounts of watery diarrhea lasting a few days. [ 2] Vomiting and muscle cramps may also occur. [ 3]
Measles is a highly contagious, vaccine-preventable infectious disease caused by measles virus. [3] [5] [11] [12] [13] Symptoms usually develop 10–12 days after exposure to an infected person and last 7–10 days. [7] [8] Initial symptoms typically include fever, often greater than 40 °C (104 °F), cough, runny nose, and inflamed eyes.
An asymptomatic carrier is a person or other organism that has become infected with a pathogen, but shows no signs or symptoms. [ 1] Although unaffected by the pathogen, carriers can transmit it to others or develop symptoms in later stages of the disease. Asymptomatic carriers play a critical role in the transmission of common infectious ...