While an allergic reaction can be a cause of hives, in the majority outbreaks, the exact cause of hives is not known. Individual hives usually last no longer than 24 hours. Hives are very common. Although they can be annoying, they usually resolve on their own.
It originating or taking place in a hospital, acquired in a hospital, especially in reference to an infection. The term “nosocomial” comes from two Greek word: “nosus” meaning “disease” + “komeion” meaning “to take care of”. Hence, “nosocomial” should apply to any disease contracted by a patient while under medical care. However, “nosocomial” has been whiltled down over the years and now just refers to hospitals- it is now synonymous with hospital- acquired. Nosocomial infections are ones that have been caught in a hospital.
A nosocomial infection is specifically one that was not present or incubating prior to the patient being admitted to the hospital, but occurred within 72 hours after admittance to the hospital. Nosocomial infections are responsible for about 20,000 deaths in the U.S. per year.
Sites of nosocomial infections from most to least common: urinary tract, skin (especially burns), blood (bacterium), gastrointestinal tract, and central nervous system