Ureaplasma(redirected from ureaplasmas)
a genus of gram-negative, nonmotile, pleomorphic bacteria that lack a cell wall and form small granular colonies. U. urealy´ticum is a common inhabitant of the genitourinary tract and is associated with sexually transmitted nongonococcal urethritis.
A genus of microaerophilic to anaerobic, nonmotile bacteria (family Mycoplasmataceae) with no cell walls. Gram-negative, they are predominantly coccoidal to coccobacillary elements, approximately 0.3 mcm in diameter, which frequently grow in short filaments; colonies are generally small, 20-30 mcm in diameter, and may have no zones of surface growth. Ureaplasma hydrolyze urea with production of ammonia, and are found in the human genitourinary tract, occasionally in the pharynx and rectum. In males, they are associated with nongonococcal urethritis and prostatitis; in females, with genitourinary tract infections and reproductive failure; in neonates, they may cause pneumonia or meningitis. The type species is Ureaplasma urealyticum.
Ureaplasma/Urea·plas·ma/ (-plaz″mah) a genus of nonmotile pleomorphic, gram-negative bacteria (family Mycoplasmataceae) lacking a cell wall and hydrolyzing urea; U. urealyt´icum is associated with nonspecific urethritis in males and genital tract infections in females.
a genus in the family Mycoplasmataceae. There are two species, U. urealyticum, found in humans, and U. diversum, which is associated with genital disease in cattle. See ureaplasmosis. Called also t-strain mycoplasma.