Severe acute respiratory syndrome
dry cough; shortness of breath; chest pain when coughing or breathing; diarrhea; sore throat; runny nose. A specific blood test for SARS does not exist.
Most people who get SARS need to go to the hospital and it can be fatal. Currently there are no specific anti-viral medications that are effective against SARS. See your doctor or nurse right away if there is an outbreak of SARS and you have symptoms of the infection.
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X-linked SCID, the most common type, a genetic flaw damages molecules that allow T cells and B cells to receive signals from crucial growth factors. ADA deficiency results from the lack of an enzyme called adenosine deaminase (ADA) that helps cells, especially immune cells, to get rid of toxic byproducts. Without ADA, poisons build up […]
- Severe congenital neutropenia
One of several genetic disorders of the bone marrow that is evident at birth and characterized by a lack of neutrophils (a type of white blood cells that are important in fighting infection). Children with severe congenital neutropenia suffer from frequent bacterial (but not viral or fungal) infections. They are also at increased risk for […]
- Sex before sports
“Athletes when sluggish are revitalized by lovemaking.” In fact, sex does not impair an athlete’s performance, as proved by treadmill tests before and after intercourse. And perhaps in keeping with Pliny’s observation, lovemaking raises testosterone levels in men. Whether it truly revitalizes them is unproven.
- Sex chromosome
The X or Y chromosome in humans. (Some other species have other sex chromosomes.)
- Sex region Y
A region on the Y chromosome that determines the sex of the individual. This region which goes by the symbol SRY (sex region Y) is necessary and sufficient for male sex determination. It is the testis-determining factor. Mutations in SRY give rise to XY females with gonadal dysgenesis who appear to be normal females at […]