Category: S

A genus of parasitic protozoans that infect birds, reptiles, and herbivorous mammals. S. lindemanni, which occasionally infects man, forms cylindrical cysts (sarcocysts) in the muscle fibers. In heavy infections these cysts can cause tissue degeneration and so provoke muscular pain and weakness. Sarcocysts have, in the few positively diagnosed cases, been located in the heart…

An obsolete term for a fleshy tumor (sarcoma) of the testis. An enlargement of the testicle that resembles muscle tissue.  

Blood poisoning by toxins of saprophytic bacteria (bacteria living on dead or decaying matter). Poisoning resulting from the absorption of decay products into the bloodstream.  

A small hairy fly of the widely distributed genus Phlebotomus. Adult sandflies rarely exceed 3 mm in length and have long slender legs. The bloodsucking females of certain species transmit various diseases, including ‘leishmaniasis, sandfly fever, and bartonellosis.  

A British voluntary organization providing a telephone service for the suicidal and despairing.  

A group of water and alcohol soluble basic dyes used to stain cell nuclei and as counterstains for Gram-negative bacteria.  

A sac or pouch. The saccus endolymphaticus is the small sac connected to the saccule and utricle of the inner ear by the endolymphatic duct.  

Organized aggressive behavior usually committed by members of adolescent gangs. Street violence is a public health problem in more than 800 of the largest US cities, where as many as 35 percent of high school dropouts and 5 percent of elementary school children are affiliated with street gangs. Membership in a street gang increases the…

Extreme aggressive behavior occurring in a school setting. School violence includes different types of criminal behavior, ranging from theft, property offenses, and vandalism to homicide of teachers and other students. High levels of school violence are not confined to urban schools but take place at suburban and rural schools as well. School violence has been…

An abnormal, growing, longitudinal cavity that forms within the spinal cord, most frequently in the cervical or neck region. A syrinx may extend into the gray matter (as in syringomyelia) or into the lower brain stem (as in syringobulbia). A common symptom of an invading syrinx is loss of pain and temperature sensations. There may…