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Definition Sleeping sickness is infection with germs carried by certain flies. It results in swelling of the brain. Alternative Names African trypanosomiasis Causes, incidence, and risk factors Sleeping sickness is caused by two germs, Trypanosoma brucei rhodesiense and Trypanosomoa brucei gambiense . The more severe form of the illness is caused by T. rhodesiense . Tsetse flies carry the infection. When an infected fly bites you, the infection spreads through your blood. Risk factors include living in parts of Africa where the disease is found and being bitten by tsetse flies. The disease is very rare in the United States, and is only found in travelers who have visited or lived in Africa.
Definition Serum sickness is a reaction similar to an allergy. Specifically, it is an immune system reaction to certain medications, injected proteins used to treat immune conditions, or antiserum, the liquid part of blood that contains antibodies that help protect against infectious or poisonous substances. See also: Immune response Causes, incidence, and risk factors Plasma is the clear fluid portion of blood. It does not contain blood cells, but it does contain many proteins, including antibodies, which are formed as part of the immune response to protect against infection. Antiserum is produced from the plasma of a person or animal that has immunity against a particular infection or poisonous substance. Antiserum may be used to protect a person who has been exposed to a potentially dangerous microorganism against which the person has not been immunized. For example, you may receive a certain type of antiserum injection if you have been exposed to tetanus or rabies . This is called passi...
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